Table 1 An examination of transgenic livestock species and their value in animal production
From: A review of transgenic animal techniques and their applications
Animal | Genes introduced or deleted | Performance criteria (consumer benefit) | Reference |
|---|---|---|---|
Bovine | β and κ casein | Casein protein expression has increased (improved protein content of milk) | [59] |
Bovine | Intestinal lactase | Lactose in milk is being reduced (lactose intolerant people) | [60] |
Bovine | Lysostaphin | Resistance to mastitis (reduced use of antibiotics) | [61] |
Bovine | β-Lactoglobulin | Higher milk production of this protein, as well as increased growth and illness resistance in milk-fed calves (reduced antibiotic use and improved health benefits) | [62] |
Ovine | Growth hormone | Increased growth rates, improved feed conversion efficiency, lower carcass fatness, and higher lactation rates (leaner meat) | [63] |
Ovine | Myostatin | In sheep, myostatin expression was reduced, and muscle mass was raised (leaner meat) | [64] |
Porcine | Insulin-like growth factor 1 | Increased growth rate and lower fat content in the carcass (leaner meat) | [65] |
Porcine | α-Lactalbumin | Piglets’ growth rate has increased, and their health has improved | [66] |