Animal Science Department, North Carolina State University, Box 7621, 27695-7621, Raleigh, NC, USA.
Theor Appl Genet. 1987 Oct;74(6):793-801. doi: 10.1007/BF00247559.
Replicated within full-sib family single-trait selection was conducted for 10 generations in mice for (1) high or low 12-week epididymal fat pad percentage (100 x epididymal fat pad weight/body weight) or (2) high or low 12-week hind carcass percentage (100 x hind carcass weight/body weight). Pooled realized heritabilities based on high, low and divergent selection were 0.66±0.09, 0.65±0.13 and 0.66±0.05 for epididymal fat pad percentage and 0.48±0.08, 0.33±0.08 and 0.40±0.04 for hind carcass percentage. The pooled realized genetic correlation (rG R) between epididymal fat pad percentage and hind carcass percentage based on divergence was -0.67±0.04. Other estimates of (rG R) were: epididymal fat pad percentage with body weight (0.57±0.05); epididymal fat pad percentage with epididymal fat pad weight (1.17±0.05); hind carcass percentage with body weight (-0.61±0.09); hind carcass percentage with hind carcass weight (-0.05±0.11). Indirect measures of fat and lean tissue percentages were highly heritable, and (rG R) between them would be desirable from the standpoint of analogous types of traits in livestock. In the same context, undesirable (rG R)'s were found between epididymal fat pad percentage and body weight and between hind carcass percentage and body weight.
在小鼠中进行了全同胞家系单性状选择，选择的性状为：（1）12 周附睾脂肪垫百分比（100x 附睾脂肪垫重量/体重）高或低，或（2）12 周后腿体百分比（100x 后腿体重量/体重）高或低。基于高、低和分歧选择的综合现实遗传力分别为附睾脂肪垫百分比的 0.66±0.09、0.65±0.13 和 0.66±0.05，后腿体百分比的 0.48±0.08、0.33±0.08 和 0.40±0.04。基于分歧的附睾脂肪垫百分比和后腿体百分比的综合现实遗传相关系数（rG R）为-0.67±0.04。其他 rG R 的估计值为：附睾脂肪垫百分比与体重（0.57±0.05）；附睾脂肪垫百分比与附睾脂肪垫重量（1.17±0.05）；后腿体百分比与体重（-0.61±0.09）；后腿体百分比与后腿体重量（-0.05±0.11）。脂肪和瘦肉组织百分比的间接测量值具有高度遗传力，从家畜中类似类型的性状的角度来看，它们之间的 rG R 是理想的。在相同的背景下，发现附睾脂肪垫百分比与体重之间以及后腿体百分比与体重之间存在不理想的 rG R。
