Selection for 8-week body weight in normal and dwarf chickens under different water/feed environments.
Normal and dwarf chickens fed either regular (.4%) or high (1.6%) salt diets were selected for four generations for high 8-wk body weight. Selection gains in body weight were greater in dwarf than in normal genotypes. Selections differentials, gains, and heritabilities were greater in lines selected under the .4% salt environment. When tested females were fed .4% salt diets, normal females from lines selected after being fed 1.6% salt diets had less fat than those from lines selected after being fed .4% salt diets. However, no differences were observed in dwarf females from the two selection environments.
U.S. Department of Agriculture, Athens, Georgia.
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Marks
D000273:Adipose Tissue / Q000378:metabolism; D000818:Animals; D001835:Body Weight; D002645:Chickens / Q000235:genetics* / Q000254:growth & development; D004032:Diet; D005260:Female; D005838:Genotype; D008297:Male; D012641:Selection, Genetic; D013045:Species Specificity