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Genetic diversity analysis of some Egyptian Origanum and Thymus species using AFLP markers

Abstract

Background

In the present investigation, two genera of family Labiatae (genus Origanum and genus Thymus including their available species in Egypt) were analyzed genetically on DNA level using amplified fragment length polymorphism (AFLP) markers. Four selective primer combinations (E-AGC/M-CAA, E-AGC/M-CAC, E-AGG/M-CTC, and E-ACC/M-CAT) were used to detect genetic variations (polymorphisms) within and between the studied plant species of each genus and with their cultivated relatives.

Results

A total of 193 amplified fragments were obtained overall primer combinations with a disparity in the number of bands for each primer combination. The primer combination E-AGG/M-CTC exhibited a large number of amplicons (67) compared to the other primers with polymorphism percentage 69%. The polymorphism information content (PIC) was calculated for the four primer combinations showing a very high values ranging between 0.98 and 0.99. On the other hand, Thymus species (Thymus vulgaris, Thymus capitatus L., and Thymus decassatus Benth.) exhibited a total number of 171 amplicons for all primer combinations with an average of 42 bands. The primer combination E-AGG/M-CTC produced the largest number of bands (62 bands) with polymorphism percentage 35%, even though the primer combination AGC/M-CAA was more efficient to give high polymorphisms within Thymus species where it resulted in a total of 35 bands with polymorphism percentage 63%. The PIC values were calculated ranging from 0.96 to 0.99.

Conclusion

One can conclude that AFLP technique was informative and efficient technique to give a good coverage of Origanum and Thymus genomes. Furthermore, it was helpful to elucidate the genetic variations and phylogenetic relationships within the studied species as a basis for further studies on these genera and related species.

Background

Family Labiatae or Lamiaceae is a family of flowering plants commonly known as the mint or deadnettle or sage family. It contains about 236 genera and has been stated to contain 7.587 species according to the world checklist of selected plant families (WCSP, 2017). Labiatae plants are frequently aromatic in all parts and include many widely used culinary herbs [34]. In addition, many biologically active essential oils have been isolated from various members of this family. Two genera of family Labiatae were chosen for the present study (Origanum and Thymus).

Genus Origanum comprises about 38 species widely distributed in the Mediterranean, Euro-Siberian, and Irano-Siberian regions [24]. It is an important genus belonging to the Lamiaceae family [10]. This genus is very appreciated for its volatile oil and it is characterized by a great morphological and chemical diversity [15]. Origanum species have many potentialities due to their medicinal, culinary, and agricultural importance and will be mentioned briefly hereafter. The medicinal importance includes their effect on gastrointestinal diseases such as diarrhea, stomach pain, colic, and gastric ulcers; respiratory diseases (e.g., asthma, cough and chest pain) [29]; abnormal menstrual cycles [10]; kidney and liver diseases; metabolic, hormonal, and neuronal disorders; skin; and urogenital system diseases [29]. They have also been used as sedatives and, due to their biocidal properties, as antiparasitic and anthelmintic [10, 15]. Furthermore, Origanum has been used to control diabetes and obesity such as O. vulgare which can delay the development of diabetic complications and correct metabolic abnormalities due to its hypoglycemic property [26]. Moreover, these plants have antibacterial and antifungal activities which give them a very important role not only for treating infectious diseases, but also for use as food preservatives as they much delay microbial growth and better preserved food. Similarly, these plants affect plant and tree fungal pathogens which cause heavy losses to farmers, so they are important for the agricultural sector. On the other hand, although tumors are being very difficult to treat because of its enormous complexity and variability, some Origanum species demonstrated antitumor and cytotoxic activity against several cell lines such as (O. vulgare, O. syriacum, O. dictamnus, O. mycrophyllum, O. libanoticum, O. majorana, O. compactum, and O. onites) as proved by [5,6,7, 14, 16, 22, 31].

In the same context, genus Thymus is very frequent in the Mediterranean region; it consists of over 400 species of herbaceous annual and perennial plants that are extensively used for medicinal and non-medicinal purposes [28]. It has long history of being used in traditional medicine for treatment of various diseases, for instance, to treat respiratory diseases (whooping cough, bronchitis, and asthma) in the form of tea, ointment, tincture, and syrup or by steam inhalation. In addition, it is used to prevent hardening of the arteries, treatment of toothache, urinary tract infection, and dyspepsia [20]. Furthermore, the remedial potential of Thymus is due to the presence of flavonoids, thymol, carvacrol, eugenol, phenols, luteolin, and tetramethoxylated. It has several activities such as carminative, antiviral, antispasmodic, antimycotic, mammalian age-delaying properties, antiseptic, antioxidant, anthelmintic properties, anti-HIV-1 activity, antiulcer, hypoglycemic, antihyperlipidemic activity, and specific cytotoxicity against a variety of tumor cell lines [30]. In addition, it acts as a good source of iron, calcium, manganese, and vitamin K and likewise increases blood flow and is used to overcome physical and mental weakness and insomnia [1, 33].

In spite of the wide distribution of Thymus and Origanum species in Egypt, there are some species that are threatened with loss and extinction such as Origanum syriacum which is a very rare plant grown on stony grounds in Sinai Peninsula including the coastal Mediterranean strip [8], and efforts have been undertaken to increase their numbers by cultivation in their natural habitats (Saint Catherine) to protect them from extinction as reported in Egypt’s Fifth National Report to the Convention on Biological Diversity, 2014. Additionally, Thymus decussatus was listed as a one of the indigenous species threatened with extinction in natural Egyptian environments according to The State of the World’s Forest Genetic Resources Country Report, Egypt, 2012. Assi [4] mentioned that Origanum syriacum and Thymus decussatus are the most collected species for trade in Saint Catherine protectorate because of their medicinal value.

The genetic analysis of plants is considered as a basis for researchers to characterize plant materials in nature, to detect genetic diversity or the genetic homogeneity and to select plants with special characteristics such as production of desired compounds and stress tolerance mechanisms. The pool of genetic variation in plants, namely, the medicinal and the aromatic ones, serves as the base for plant breeding as well as for selection. Molecular markers are very useful in breeding program allowing germplasm screening independent to the developmental stage of the plants and/or environmental factors [27].

Amplified fragment length polymorphism (AFLP) is a powerful DNA fingerprinting technology applicable to any organism of any origin or complexity such as prokaryotes, plants, animals, and human [40]. It was originally described by [41] that the technique combines the reliability of restriction enzyme digestion with the utility of the polymerase chain reaction (PCR). It is based on the selective amplification of genomic restriction fragments by PCR [11].

It is successfully used in several studies for fingerprinting, studying genetic diversity, phylogenetic relationships, and genetic stability in many plant species such as Murraya koenigii growing in Eastern Asia Ghosh and Mandi [18], Kelussia odorotissima medicinal plant native to the Zagros Mountains in Iran [13], and different varieties of Curcubita ficifolia fruit in Mexico [32]. AFLP is a highly sensitive technique to detect genetic variations (polymorphisms) within a species or among closely related species. Population geneticists also use AFLP approaches to determine genetic variation across different populations [19, 44]. Indeed, this method has allowed researchers to refine the taxonomic classification of organisms based on AFLP-associated genetic markers [9]. In addition, AFLP offers several advantages over other currently used DNA markers, such as simple sequence repeats (SSR) and single nucleotide polymorphism (SNPs) [2, 23, 42].

Therefore, the current investigation was carried out to study the genetic diversity among Thymus and Origanum plant species and to detect genetic polymorphisms and constructing phylogenetic relationships within the studied plant species which could be helpful for an efficient management of these genera.

Methods

Plant material and study area

All plant samples were identified and authenticated by Dr. Yousri Abd-Elhady, Ecology and Range Management Department, Desert Research Center (no voucher specimen of this material has been deposited in a publicly available herbarium). The fresh young leaves were collected in spring of 2016, transferred into liquid nitrogen, and kept frozen at − 80 °C till use. The plant species under study are shown later in Fig. 5.

For two Origanum species, the cultivated type (Origanum vulgare) was collected from private farms at Kirdasa region, Giza Governorate, Egypt, and the other is the wild-type Origanum syriacum (L.) subsp. sinaicum (Boiss.) which collected from different sites around Saint Catherine Monastery, South Sinai Governorate, Egypt.

The three Thymus species chosen for the present study were Thymus vulgaris (the cultivated type) which was collected from private farms at Kirdasa region, Giza Governorate, Egypt. For two wild types of thyme, Thymus capitatus (L.) was collected from the naturally grown rocky ridge habitats, especially wet sites distributed in the North Coast, Mersa Matruh Governorate, and the other wild type is Thymus decassatus (Benth.) which was collected from Saint Catherine Protectorate, South Sinai Governorate.

Amplified fragment length polymorphisms (AFLP)

The plant samples (young leaves) were ground using liquid nitrogen, and total genomic DNA was isolated using a DNeasy Plant Mini Kit (Qiagen, Santa Clarita, CA). The AFLP analysis was carried out using the AFLP® Analysis System II (Invitrogen, USA) (Cat. No. 10483-022), according to the manufacturer’s protocol. A 400-ng DNA of each sample was digested simultaneously with restriction enzymes (EcoRI and MseI) overnight at 37 °C, the digested samples were incubated at 70 °C for 15 min to inactivate the restriction endonucleases. EcoRI and MseI adapters were ligated to the digested DNA samples to generate template DNA for amplification. Pre-amplification was carried out with EcoRI and MseI primers each carrying one selective nucleotide at the 3′ position. Selective amplification of restriction fragments was carried out using four primer combinations (E-AGC/M-CAA, E-AGC/M-CAC, E-AGG/M-CTC, and E-ACC/M-CAT) (Table 1).

Table 1 A list of AFLP primers and adapters sequence

Data analysis

Calculation of the polymorphism information content value (PIC) was based on the results obtained from AFLP according to [38] using the following formula:

$$ \mathrm{PIC}=1-\varSigma {\mathrm{fi}}^2 $$

where fi2 is the frequency of the allele. The PIC value shows the discriminatory power of a locus, and it ranges from 0 (monomorphic) to 1 (very highly discriminative).

Results

Four primer combinations were used for studying the chosen Origanum and Thymus species as shown in Figs. 1 and 2. The resulting data of each species are not scored as length polymorphisms, but instead as presence − absence polymorphisms, and it will be discussed hereafter.

  1. 1.

    Origanum species

Fig. 1
figure1

The AFLP banding patterns of Origanum species (1, O. vulgare; 2, 3, 4, and 5, O. syriacum) and Thymus species (A, T. vulgaris; B, T. capitatus; and C, T. decassatus) using two primer combinations (E-AGC/M-CAA and E-AGC/M-CAC). M: 100-bp DNA ladder

Fig. 2
figure2

The AFLP banding patterns of Origanum species (1, O. vulgare; 2, 3, 4, and 5, O. syriacum) and Thymus species (A, T. vulgaris; B, T. capitatus; and C, T. decassatus) using two primer combinations (E-AGG/M-CTC and E-ACC/M-CAT). M: 100-bp DNA ladder

AFLP profiles showed a large number of bands (193) differing in size and ranging between 105 and 1100 bp with polymorphism percentage 53% for all primer combinations (Table 2). Each primer combination will be presented separately.

  1. a.

    Combination E-AGC/M-CAA

Table 2 AFLP primer combinations, selective nucleotides, number of polymorphic bands, total bands, polymorphism percentage, and fragment size range in Origanum species

It produced a total number of 40 bands ranging in size from 130 to 990 bp of which, 14 bands were monomorphic while 26 bands were polymorphic with polymorphism percentage (65%) (Fig. 1 and Table 2). Five positive specific bands (present bands) were detected, out of which two bands at 540 and 200 bp are specific for sample no. 2. Two positive bands at 590 and 380 bp are specific for sample no.5 while the fifth band is at 410 bp, and it is unique for sample no. 4. In contrast, 510- and 390-bp bands were negatively specific (absent bands) for sample no. 5 and likewise for sample no. 2 at 215 bp.

  1. b.

    Combination E-AGC/M-CAC

This combination resulted in a total of 29 bands ranging between 260 and 1000 bp (Fig. 1). All bands were common (monomorphic) with polymorphism percentage 0% (Table 2). It produced the smallest number of bands relative to the other combinations used.

  1. c.

    Combination E-AGG/M-CTC

The combination E-AGG/M-CTC produced the largest number of bands (67 bands) compared to the other primer combinations ranging between 115 and 1100 bp with polymorphism percentage 69% (Fig. 2). The monomorphic bands were 21 while the polymorphic ones were 46 (Table 2). Five bands were positive specific, three of which at 250, 200, and 195 bp were unique for sample no. 4 while bands at 210 and 145 bp were unique for samples no. 2 and 3, respectively. On the other hand, eleven negative specific bands were counted, of which bands at 1100 and 170 bp were negatively specific for sample no. 4. Moreover, bands at 900, 680, 600, and 370 bp were absent for sample no. 2 while bands at 480, 310, and 160 bp were negatively specific for sample no. 1 (the cultivated type Origanum vulgare) and bands at 180 and 150 bp were absent for sample no. 5.

  1. d.

    Combination E-ACC/M-CAT

It gave a total number of 57 bands ranging in size from 105 to 1100 bp (Fig. 2). Thirty-one of them were polymorphic bands with polymorphism percentage 54% (Table 2). Eight bands were positively specific for particular samples, of which bands of sizes 1050, 260, 205, and 200 bp were specific for sample no. 1 representing Origanum vulgare (cultivated type). Moreover, band at size 1060 bp was specific for sample no. 2 while bands of size 245, 215, and 175 bp were specific for sample no.4. In contrast, only one band at 1000 bp was negatively specific for sample no. 1.

The PIC values were calculated according to the equation mentioned above. The obtained PIC values for Origanum species are very high, ranging from 0.98 to 0.99 (Table 3) corresponding to primer combinations E-AGG/M-CTC and E-AGC/M-CAA, respectively with an average of 0.97 all over the four primer combinations. The PIC value provides an estimate of the discriminatory power of a locus by taking into consideration, not only the number of alleles but also the relative frequencies of those alleles. PIC values vary from 0 (monomorphic) to 1 (very highly discriminative, with many alleles in equal frequencies).

  1. 2.

    Thymus species

Table 3 Information obtained from AFLP using four primer combinations in Origanum species

AFLP banding patterns revealed a total number of 171 bands for all primer combinations, ranging in size from 120 to 1000 bp (Figs. 1 and 2). The results obtained will be discussed hereafter.

  1. a.

    Combination E-AGC/M-CAA

This combination exhibited a total of 35 bands ranging in size from 180 to1000 bp (Fig. 1), out of which 13 bands were monomorphic while the remainder were polymorphic bands with polymorphism percentage 63% (Table 4). Nine bands were negatively specific (absent) at band sizes (720, 670, 610, 540, 510, 440, 420, 380, and 265 bp), and the remaining polymorphic bands were positive specific. Six positive specific bands were unique for the cultivated Thymus vulgaris corresponding to band sizes (620, 570, 560, 500, 220, and 210 bp). Five positive bands were specific for Thymus capitatus (740, 320, 250, 240, and 180 bp) while two bands are unique for Thymus decussates (690 and 300 bp).

  1. b.

    Combination E-AGC/M-CAC

Table 4 The AFLP primer combinations, selective nucleotides, number of total bands polymorphic bands, and fragment size range for Thymus species

The combination E-AGC/M-CAC produced the smallest number of bands (23 bands) relative to the other combinations; their sizes ranged from 250 to 1000 bp (Fig. 1). The number of monomorphic bands was 15, and only 8 bands were polymorphic ones showing polymorphism percentage 35% (Table 4). The positive specific bands were six bands, out of which four bands were specific for Thymus decussates (Benth.) species (sample C) at band sizes (390, 295, 270, and 250 bp) while band of size 520 bp was positively specific for sample (B) which represents Thymus Capitatus (L.). Band of size 490 bp was unique for sample (A) corresponding to the cultivated species Thymus vulgaris.

  1. c.

    Combination E-AGG/M-CTC

It resulted in the largest number of bands (62) ranged between 120 and 830 bp (Fig. 2). The monomorphic bands were 44 bands, and the polymorphic ones were 18 bands (Table 4) with polymorphism percentage 35%. Seven bands were positive specific, three of which (nos. 19, 32, and 33) were unique for the cultivated species (Thymus vulgaris) with band sizes (385, 280, and 270), respectively. Two bands (550 and 160 bp) were specific for sample (B) representing the wild type (Thymus capitatus L.). The remaining 2 bands at (660 and 210 bp) were specific for sample (C) representing the wild type (Thymus decussatus Benth.). Eleven negative specific bands were detected, seven of them were for sample A (Thymus vulgaris) at 830, 630, 400, 285, 215, 155, and 130 bp. Three negative bands were for sample (C) at 700, 190, and180, and only one negative band at 150 bp is specific for sample (B).

  1. d.

    Combination E-ACC/M-CAT

The combination E-ACC/M-CAT produced a total number of 51 bands ranging in size from 120 to 790 bp with polymorphism percentage 35% (Fig. 2). The monomorphic bands were 30 bands while the polymorphic ones were 21 bands (Table 4), of which 3 bands were unique for sample (C) (Thymus decussatus Benth.) at band sizes 790, 550, and 240 bp. Two bands were specific for sample (A), Thymus vulgaris, at band sizes 265 and 230 bp. Bands at 770, 400, 345, 270, 185, 175, 170, 153, and 150 bp were negatively specific for the studied Thymus species. Seven of them were negatively specific for sample (A) at 680, 630, 600, 385, 225, 200, and 150 bp. Five negative bands were specific for sample (C) at 345, 195, 175, 170, and153 bp while at 770, 400, and 185 bp negative specific bands were detected for sample (B).

The PIC values based on AFLP results of Thymus species were calculated. All results and the informativeness of the AFLP markers used for Thymus species genomes were depicted in Table 5. The PIC values were very high ranging between 0.96 and 0.99 with an average of 0.97.

Table 5 The PIC value and other information obtained from AFLP using four primer combinations for Thymus species

Data analyses

Applying the statistical package for social science program (SPSS) ver. 17 on the obtained results of the studied Origanum species and Thymus species using AFLP technique, the results were as follows:

  1. a.

    Origanum species

The similarity matrix of Origanum species (Table 6) revealed that the highest similarity percentage (86%) was between samples no. 4 and no. 5 representing Origanum syriacum L. subsp. sinaicum (Boiss.) collected from Saint Catherine region. However, the lowest similarity percentage (70%) was between samples no. 2 and no. 5.

Table 6 Genetic similarity matrix within Origanum samples based on AFLP data

The resulted dendrogram (Fig. 3) consisted of two main clusters. The first cluster branched into two groups, group 1 included sample no. 1 corresponding to the cultivated Origanum species (Origanum vulgare) while group 2 comprised samples no. 2 and 3 representing Origanum syriacum L. subsp. sinaicum (Boiss.) collected from different sites in Saint Catherine. However, the second cluster included samples no. 4 and no. 5 representing Origanum syriacum L. subsp. sinaicum (Boiss.) species collected from different sites in Saint Catherine.

  1. b.

    Thymus species

Fig. 3
figure3

The genetic relatedness within (1) Origanum vulgare (cultivar plant collected from Kirdasa region) and (2–5) Origanum syriacum L. subsp. sinaicum (Boiss.) (wild type collected from different locations around Saint Catherine Monastery) based on AFLP results

The similarity matrix of Thymus species (Table 7) showed that the closest relationship was between sample B and sample (C) (86%). In contrast, the lowest similarity (81%) was between the cultivated type represented by sample (A) and sample (C).

Table 7 Genetic similarity matrix within the studied Thymus species based on AFLP data

The obtained dendrogram (Fig. 4) divided the studied Thymus species into two main clusters. The first cluster included the cultivated type of Thymus (Thymus vulgaris), while the second cluster included the two wild species (Thymus capitatus L. and Thymus decussates Benth.).

Fig. 4
figure4

The genetic relatedness within (A) Thymus vulgaris (cultivated type collected from Kirdasa region), (B) Thymus capitatus (wild type collected from North Coast), and (C) Thymus decassatus (wild type collected from Saint Catherine) based on AFLP results

Discussion

The previous results of the studied Origanum species revealed that the monomorphic bands all over primer combinations are considered species-specific markers for Origanum species regardless of its type (cultivated or wild) or sampling location. Moreover, the primer combination E-AGG/M-CTC was more efficient to produce large numbers of amplified fragments (67 bands) with high levels of polymorphisms (46 polymorphic bands with 69% polymorphism percentage) compared to the other combinations. In contrast, the primer combination E-AGC/M-CAC was not useful in genetic diversity analysis of Origanum species (29 bands, 0% polymorphism). Overall primer combinations there were distinctive bands for Origanum vulgare (cultivated type) over Origanum syriacum (wild type) samples as mentioned previously. The results became more evident by the constructed dendrogram based on genetic distances where Origanum syriacum samples collected from different locations in Saint Catherine were more close to each other than Origanum vulgare.

On the other hand, the obtained results of Thymus species under study showed that the monomorphic bands are characteristic for the studied species. In addition, the primer combination E-AGG/M-CTC was informative since it produced a large number of amplified fragments (62 bands). However, the primer combination E-AGC/M-CAA resulted in a less number of bands (35 bands) but the polymorphism percentage was moderately high relative to other primer combinations clarifying its usefulness and ability to detect polymorphisms within the studied species. Furthermore, the resulted dendrogram separated the cultivated type (Thymus vulgaris) from the two wild types (Thymus capitatus and Thymus decussatus). The studied Origanum and Thymus plant species are depicted in Fig. 5.

Fig. 5
figure5

Showing the Origanum species and Thymus species under study

These findings were in agreement with [37] who studied the genetic diversity of Ambrosia trifida using AFLP markers, [12] who analyzed the genetic polymorphisms in wild Nicotiana species and Cuban cultivated tobacco using AFLP. Likewise, with Aparajita and Rout [3] who used AFLP to ascertain the extent of genetic diversity and relatedness in Albizia species. Other studies were conducted by [35] who investigated the genetic relationships among Texas bluegrass genotypes and [25]. Additionally [36] who used AFLP to study the molecular fingerprinting of the Egyptian medicinal plant Cocculus pendulus and [17] who constructed a DNA fingerprinting for some Egyptian date palm cultivars.

Conclusion

The obtained results of Origanum and Thymus species may be rendered to the variations in morphology and chemical composition of the studied species. Noteworthy to mention that the genetic diversity in plants is not only related to internal genetic background and reproductive system but also affected by population structure, spatial distribution pattern, and reproduction mode [21].

Finally, the AFLP technique is reliable and useful technique to detect genetic variations and clarify the genetic relationships among the Egyptian Thymus and Origanum species. Moreover, the obtained results could be helpful for any improvement of cultivars and biodiversity maintenance and restoration of these genera.

Availability of data and materials

All plant material was identified and collected from their natural habitats by authors and authenticated by Dr. Yousri Abd-Elhady, Ecology and Range Management Department, Desert Research Center.

Abbreviations

AFLP:

Amplified fragment length polymorphism

DNA:

Deoxyribonucleic acid

PIC:

Polymorphism information content

SSR:

Simple sequence repeat

SNPs:

Single nucleotide polymorphisms

MseI:

Restriction endonuclease enzyme isolated from Micrococcus species

EcoRI:

Restriction endonuclease enzyme isolated from Escherichia coli species

References

  1. 1.

    Abdelkader MA, Mohamed NZ (2012) Evaluation of protective and antioxidant activity of thyme (Thymus vulgaris) extract on paracetamol-induced toxicity in rats. Australian J Basic Appl Sci 6(7):467–474

    Google Scholar 

  2. 2.

    Al-Samarai FR, Al-Kazaz AA (2015) Molecular markers: an introduction and applications. Eur J Mol Biotechnol 9:3

    Article  Google Scholar 

  3. 3.

    Aparjita S, Ranjan RG (2010) Molecular analysis of Albizia species using AFLP markers for conservation strategies. J Genet 89:1

    Article  Google Scholar 

  4. 4.

    Assi, R (2007). MP Threat Analysis and Threat Reduction Assessment Report. Conservation and sustainable use of medicinal plants in arid and semi-arid ecosystems project.

  5. 5.

    Ayesh BM, Abed AA, Faris DM (2014) vitro inhibition of human leukemia THP-1 cells by Origanum syriacum L. and Thymus vulgaris L. extracts. BioMed Central Res Notes 7:612

    Google Scholar 

  6. 6.

    Begnini KR, Nedel F, Lund RG, Carvalho PH, Rodrigues MR, Beira FT (2014) Composition and antiproliferative effect of essential oil of Origanum vulgare against tumor cell lines. Journal of Medicinal Food. 17:1129–1133

    Article  Google Scholar 

  7. 7.

    Bostancıoğlu RB, Kürkçüoğlu M, Başer KH, Koparal AT (2012) Assessment of anti-angiogenic and anti-tumoral potentials of Origanum onites L. essential oil. Food and Chemical Toxicology. 50:2002–2008

    Article  Google Scholar 

  8. 8.

    Boulos L (2002) Flora of Egypt. Volume 3: Verbenaceae-Compositae. Al-Hadara Publishing, Cairo, Egypt, p 12 ISBN 9775429250

    Google Scholar 

  9. 9.

    Chial H (2008) DNA fingerprinting using amplified fragment length polymorphisms (AFLP). Nat Educ 1(1)

  10. 10.

    Chishti S, Kaloo ZA, Sultan P (2013) Medicinal importance of genus Origanum: A review. Journal of Pharmacognosy and Phytotherapy. 5:170–177

    Google Scholar 

  11. 11.

    Dhutmal RR, Mundhe AG, More AW (2018) Molecular markers techniques: a review. Int J Curr Microbiol App Sci Issue 6:816–825

    Google Scholar 

  12. 12.

    Dominguez Y, Alvarez SP, Tapia MAM, Medina JAC, Ardisana EFH (2015) Analysis of genetic polymorphism in wild Nicotiana species and Cuban cultivated tobacco (solanaceae) through AFLP. Biotechnologia Aplicada 35(2)

  13. 13.

    Ebrahimi M, Mokhtari A, Amirian R (2018) A highly efficient method for somatic embryogenesis of Kelussia odorotissima Mozaff., an endangered medicinal plant. Plant Cell. Tissue and Organ Culture 132:99–110

    Article  Google Scholar 

  14. 14.

    El Babili F, Bouajila J, Souchard JP, Bertrand C, Bellvert F, Fouraste I (2011) Oregano: chemical analysis and evaluation of its antimalarial, antioxidant, and cytotoxic activities. Journal of Food Science. 76:c512–c518

    Article  Google Scholar 

  15. 15.

    El Gendy A, Leonardi M, Mugnaini L, Bertelloni F, Valentina VE, Nardoni S (2015) Chemical composition and antimicrobial activity of essential oil of wild and cultivated Origanum syriacum plants grown in Sinai. Egypt. Industrial Crops and Products. 67:201–207

    Article  Google Scholar 

  16. 16.

    Elansary HO, Mahmoud EA (2015) Egyptian herbal tea infusions’ antioxidants and their antiproliferative and cytotoxic activities against cancer cells. Natural Product Research. 29:474–479

    Article  Google Scholar 

  17. 17.

    El-Khishin DA, Adawy SS, EHA H, El-Itriby HA (2003) AFLP fingerprinting of some Egyptian date palm (Phoenix dactylifera L.) cultivars. Arab J Biotech 6(2):223–234

    Google Scholar 

  18. 18.

    Ghosh S, Mandi SS (2018) Altitudinal effect in active principle content in Murraya koenigii (L) correlated with DNA fingerprinting study. Journal of Medicinal Plants Studies 6:20–26

    Google Scholar 

  19. 19.

    Hansen M, Kraft T, Christiansson M, Nilsson N (1999) Evaluation of AFLP in Beta. Theor Appl Genet. 98:845–852

    Article  Google Scholar 

  20. 20.

    Hashim S, Gamil M (1988) Plants and herbs between the Iraqi folk medicine and scientific research. Dar revolution of Press and Publication, Baghdad

    Google Scholar 

  21. 21.

    Hu, Sh., Wu Sh, Wang Y, Zhao H and Zhang Y (2014). Genetic diversity and genetic structure of different types of natural populations in Osmanthus fragrans Lour. and the relationships with sex ratio, population structure, and geographic isolation. The Scientific World Journal, article ID 817080.

  22. 22.

    Hussain, AI, Anwar, F, Rasheed, Sh, Nigam, PS, Janneh, O, Sarker, SD (2011). Composition, antioxidant and chemotherapeutic properties of the essential oils from two Origanum species growing in Pakistan. Revista Brasileira de Farmacognosia. 21: 943- 952.

    Article  Google Scholar 

  23. 23.

    Idrees, M and Irshad, M (2014). Molecular markers in plants for analysis of genetic diversity: a review. Eur Acad Res, Vol. (II); 1.

  24. 24.

    Kokkini, F (1997). Taxonomy, diversity and distribution of Origanum species. In Proceedings of the IPGRI International Workshop on Oregano, Italy, Rome, pp:2-12.

  25. 25.

    Koopman WJM, Zevenbergen MJ, Vander Berg RG (2001) Species relationship in Lactuceae s.l. (Lactuceae, Aseraceae) inferred from AFLP fingerprints Am. J. Bot. 88:1881–1887

    Article  Google Scholar 

  26. 26.

    Kumar AS, Kavimani S, Jayaveera KN (2011) A review on medicinal plants with potential antidiabetic activity. International Journal of Phytopharmacology. 2:53–60

    Google Scholar 

  27. 27.

    Kumar P, Gupta VK, Misra AK, Modi DR, Pandey BK (2009) Potential of molecular markers in plant biotechnology. Plant Omics Journal 2(4):141–162 ISSN: 1836-3644

    Google Scholar 

  28. 28.

    Leal F, Taghouti M, Nunes F, Silva A, Claudia A, Matos M (2017) Thymus Plants: a review micropropagation, molecular and antifungal activity. DOI. https://doi.org/10.5772/66623

    Google Scholar 

  29. 29.

    Liolios C, Graikou K, Skaltsa E, Chinou L (2010) Dittany of Crete: A botanical and ethnopharmacological review. Journal of ethnopharmacology. 131:229–241

    Article  Google Scholar 

  30. 30.

    Liu J (2005) Oleanolic acid and ursolic acid: research perspectives. Journal of Ethnopharmacology. 100:92–94

    Article  Google Scholar 

  31. 31.

    Marrelli M, Confortia F, Formisano C, Rigano D, Arnold NA, Menichini F (2015) Composition, antibacterial, antioxidant and antiproliferative activities of essential oils from three Origanum species growing wild in Lebanon and Greece. Natural Product Research.:1–5

  32. 32.

    Moya-Hernández A, Bosquez-Molina E, Serrato-Díaz A, Blancas-Flores G, Francisco A (2018) Analysis of genetic diversity of Cucurbita ficifolia Bouché from different regions of Mexico, using AFLP markers and study of its hypoglycemic effect in mice. South African Journal of Botany 116:110–115

    Article  Google Scholar 

  33. 33.

    Omidbaigi R (2009) Production and processing of medicinal plants, vol 2. Behnashr Publisher, Mashhad, Iran

    Google Scholar 

  34. 34.

    Pirbalouti AG, Bistghani ZE, Malekpoor F (2015) An overview on genus Thymus. J Herbal Drugs 6(2):93–100

    Google Scholar 

  35. 35.

    Renganayaki K, Read JC, Fritz AK (2001) Genetic diversity among Texas bluegrass genotypes (Poa arachnifera Torr.) revealed by AFLP and RAPD markers. Theor Appl Genet. 102:1037–1045

    Article  Google Scholar 

  36. 36.

    Shadia AF, Fareida ME-S, Sengab AB, Naglaa MS, Osman AM, El-Shaimaa SE-D (2013) Molecular fingerprinting of the Egyptian medicinal plant Cocculus pendulus. Egypt J Med Hum Genet 15:15–23

    Article  Google Scholar 

  37. 37.

    Shao M, Fu D, Wang X, Liu Z, Qu B (2018) Genetic diversity of Ambrosia trifida L. as revealed by AFLP markers. Biotechnology Journal International 21(3):1–9

    Article  Google Scholar 

  38. 38.

    Smith JSC, Chin ECL, Shu H, Smith OS, Wall SJ (1997) An evaluation of the utility of SSR loci as molecular markers in maize (Zea mays L.): comparisons with data from RFLPs and pedigree. Theor Appl Genet. 95:163–173

    Article  Google Scholar 

  39. 39.

    Verpoorte R (2000) Pharmacognosy in the new millennium: lead finding and biotechnology. J Pharm Pharmacol 52:253–262

    Article  Google Scholar 

  40. 40.

    Vos P, Hogers MB, Reijans MR, Vandelee T, Hornes M, Frijters A, Pot J, Peleman J, Kuiper M, Zabeau M (1995) AFLP: a new technique for DNA-fingerprinting. Nucl Acids Res. 23(21):4407–4414

    Article  Google Scholar 

  41. 41.

    Vos P and Zabeau M (1993). Selective restriction fragment amplification: a general method for DNA fingerprinting. European Patent Office, publication 0 534 858 A1, bulletin 93/13.

  42. 42.

    Vuylsteke M, Peleman JD, Eijk MJT (2007) AFLP technology for DNA fingerprinting. Nature Protocols 2(6):1387–1398

    Article  Google Scholar 

  43. 43.

    WCSP; World Checklist of Selected Plant Families (2017). http://wcsp.science.kew.org/home.do.

  44. 44.

    Zhang X, Nick G, Kaijalainen S, Terefework Z, Paulin L, Tighe SW, Graham PH, Lindström K (1999) Phylogeny and diversity of Bradyrhizobium strains isolated from the root nodules of peanut (Arachis hypogaea) in Sichuan, China. Syst Appl Microbiol. 22:378–386

    Article  Google Scholar 

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Acknowledgements

The authors would like to express sincere thanks and deep appreciation to Dr. Fareida M. El-Saied, Prof. of Genetics, DRC, for her guidance and continuous encouragement.

Funding

Academy of Scientific Research and Technology (ASRT) – Technology and Scientific Cooperation between Egyptian and Moroccan program.

Project 1: Code 10-2-11 (Valorisation and conservation of medicinal and aromatic plants using biotechnology techniques: a case of wild endemic Thyme in Egypt and Morocco).

Projects 2: Code 28-2-11 (The use of plant biotechnology techniques to valorize endemic Origanum sp in Egypt and Morocco).

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MZ and YA participated in plant samples’ (Origanum and Thymus Spp.) collection from their natural habitats in Egypt. MZ and EA participated in AFLP analyses of Thymus and Origanum Spp. ElS participated in the data discussion, data analyses, and drafting of the manuscript. All authors read and approved the final manuscript.

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Correspondence to El-Shaimaa Saad El-Demerdash.

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El-Demerdash, E.S., Elsherbeny, E.A., Salama, Y.A.M. et al. Genetic diversity analysis of some Egyptian Origanum and Thymus species using AFLP markers. J Genet Eng Biotechnol 17, 13 (2019). https://doi.org/10.1186/s43141-019-0012-5

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Keywords

  • AFLP markers
  • Origanum species
  • Polymorphism information content (PIC)
  • Thymus species