Stress-induced expression of IPT gene in transgenic wheat reduces grain yield penalty under drought

Journal of Genetic Engineering and Biotechnology

Table 5 Grain yield and its primary and physiological components under field conditions

Treatment	G	San Juan (EXP4)					Bordenave (EXP5)
Treatment	G	GY (g m⁻²)	GN	IGW (mg)	B (g m⁻²)	HI	GY (g m⁻²)	GN	IGW (mg)	B (g m⁻²)	HI
WW	WT	455^bc	15620^b	29.2^bc	1056^bc	0.43^b	701^b	18887^b	37.1^ab	1516^b	0.46^b
	TR1	505^ab	18521^a	27.4^cd	1252^a	0.40^b	767^ab	20938^ab	36.6^bc	1602^ab	0.48^a
	TR4	518^a	19646^a	26.8^d	1103^bc	0.48^a	719^b	20381^ab	35.3^cd	1565^b	0.46^b
WD_CP	WT	373^d	11070^c	33.7^a	883^d	0.42^b	695^b	18145^b	38.6^a	1526^b	0.45^b
	TR1	384^d	11811^c	32.4^a	899^d	0.43^b	844^a	23060^a	36.6^bc	1807^a	0.47^ab
	TR4	386^d	11630^c	33.1^a	992^cd	0.39^b	710^b	20686^ab	34.7^d	1557^b	0.46^b
WD_GF	WT	425^cd	14388^b	29.7^b	1087^c	0.40^b
	TR1	490^ab	18116^a	28.2^d	1223^ab	0.42^b
	TR4	504^ab	18154^a	28.2^cd	1236^ab	0.44^b
Genotype (G)		**	***	***	ns	ns	**	**	***	*	***
Water treatment (T)		***	***	**	**	ns	ns	ns	ns	ns	ns
G × T		ns	ns	ns	ns	**	ns	ns	ns	ns	ns
LSD		57.5	1951	1.91	133.5	0.03	78.0	2460	1.32	180.4	0.01

G genotype, T water treatment, GY grain yield (g m⁻²), GN grain number per unit area, IGW individual grain weight (mg), B above-ground biomass (g m⁻²), HI harvest index. Primary components for the three genotypes (WT, TR1, and TR4) grown under field conditions in well-watered (WW) and water-deficit conditions applied during the critical period (WD_CP) and grain filling (WD_GF) in San Juan (EXP4) and Bordenave (EXP5). Asterisks indicate significant differences (*p< 0.1; **p< 0.05; p< 0.001; ns, not significant). Means (n=4) sharing the same letters in columns do not differ (p< 0.1)