Genetic Parameters for Sex-Specific Traits in Beef Cattle
作者： R K Splan , L V Cundiff , L D Van Vleck
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摘要: Data from 3,593 beef heifers and 4,079 of their steer paternal half-sibs were used to estimate genetic parameters among female growth reproductive traits male carcass traits. Estimates heritability for adjusted 205-d weight, 365-d age at puberty, calving rate, difficulty measured on females were.16,.38,.47,.19, and.18, respectively; estimates rate expressed a normal scale. hot weight; retail product percentage; fat bone rib eye area; kidney, pelvic, heart thickness; marbling score; Warner-Bratzler shear force; taste panel tenderness; juiciness; flavor that steers an average 447 d (weaning = 185, days feed 262) were.50,.66,.58,.54,.61,.48,.66,.71,.26,.31, .00, and.04, respectively. Genetic correlations positive heifer weights with percentage, area, thickness, score, force, they negative percentage steers. Age puberty was genetically correlated tenderness but not other Calving had flavor, it percentage. favorable measures tenderness, unfavorably involve fatness. These results indicate selection some in one sex cattle may result undesirable responses the opposite sex.
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