Rydhmer L, Eliasson-Selling L, Johansson K, Stern S, Andersson K
Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala.
J Anim Sci. 1994 Aug;72(8):1964-70. doi: 10.2527/1994.7281964x.
Puberty traits of 740 Yorkshire gilts from a selection experiment were analyzed. Heritabilities were estimated to be .32 for pubertal age, .23 for length of proestrus, .16 for length of standing estrus, .29 for ability to show standing reflex, and .24 for intensity of vulvar symptoms. Genetic correlations between length of proestrus, intensity of vulvar symptoms, and ability to show standing reflex were positive. There seemed to be a negative genetic correlation between percentage of lean and intensity of vulvar symptoms. There were negative genetic correlations between growth rate and length of standing estrus, and between growth rate and ability to show standing reflex.
对来自一项选择试验的740头约克夏后备母猪的青春期性状进行了分析。初情期年龄的遗传力估计为0.32，发情前期长度的遗传力为0.23，静立发情期长度的遗传力为0.16，表现静立反射能力的遗传力为0.29，阴门症状强度的遗传力为0.24。发情前期长度、阴门症状强度和表现静立反射能力之间的遗传相关性为正。瘦肉率与阴门症状强度之间似乎存在负遗传相关性。生长速度与静立发情期长度之间以及生长速度与表现静立反射能力之间存在负遗传相关性。
