Breeding for increased productivity.
D000818:Animals; D001835:Body Weight; D001947:Breeding; D003433:Crosses, Genetic / Q000662:veterinary; D004777:Environment; D005260:Female; D005298:Fertility; D005823:Genetics; D006128:Growth; D007178:Inbreeding; D008297:Male; D008460:Meat; D009748:Nutrition Disorders / Q000517:prevention & control / Q000662:veterinary; D012756:Sheep; D012757:Sheep Diseases / Q000235:genetics / Q000401:mortality / Q000517:prevention & control; D014935:Wool