Zhang S, Bidanel J P, Burlot T, Legault C, Naveau J
Station de génétique quantitative et appliquée, Institut national de la recherche agronomique, 78352 Jouy-en-Josas Cedex, France.
Genet Sel Evol. 2000 Jan-Feb;32(1):41-56. doi: 10.1186/1297-9686-32-1-41.
Genetic parameters of body weight at 4 (W4w), 8 (W8w) and 22 (W22w) weeks of age, days from 20 to 100 kg (DT), average backfat thickness at 100 kg (ABT), teat number (TEAT), number of good teats (GTEAT), total number of piglets born (TNB), born alive (NBA) and weaned (NW) per litter, and birth to weaning survival rate (SURV) were estimated in the Chinese x European Tiameslan composite line using restricted maximum likelihood methodology applied to a multiple trait animal model. Performance data from a total of 4 881 males and 4 799 females from 1 341 litters were analysed. Different models were fitted to the data in order to estimate the importance of maternal effects on production traits, as well as genetic correlations between male and female performance. The results showed the existence of significant maternal effects on W4w, W8w and ABT and of variance heterogeneity between sexes for W22w, DT, ABT and GTEAT. Genetic correlations between sexes were 0.79, 0.71 and 0.82, respectively, for W22w, DT and ABT and above 0.90 for the other traits. Heritability estimates were larger than (ABT and TEAT) or similar to (other traits) average literature values. Some genetic antagonism was evidenced between production traits, particularly W4w, W8w and ABT, and reproductive traits.
采用多性状动物模型的限制最大似然法，对中国与欧洲品系杂交的蒂亚梅斯兰合成系4周龄（W4w）、8周龄（W8w）和22周龄（W22w）体重、20至100千克日龄（DT）、100千克时平均背膘厚度（ABT）、乳头数（TEAT）、有效乳头数（GTEAT）、每窝出生仔猪总数（TNB）、出生存活数（NBA）、断奶数（NW）以及出生至断奶存活率（SURV）的遗传参数进行了估计。分析了来自1341窝共4881头雄性和4799头雌性的性能数据。为估计母体效应在生产性状中的重要性以及雌雄性能之间的遗传相关性，对数据拟合了不同模型。结果表明，母体效应在W4w、W8w和ABT上显著存在，且在W22w、DT、ABT和GTEAT上存在性别间方差异质性。W22w、DT和ABT的性别间遗传相关性分别为0.79、0.71和0.82，其他性状的遗传相关性高于0.90。遗传力估计值大于（ABT和TEAT）或与（其他性状）平均文献值相似。生产性状，特别是W4w、W8w和ABT与繁殖性状之间存在一些遗传拮抗作用。
