文献类型： 外文期刊

作者： Zhang, SQ ¹ ; Bidanel, JP ² ; Burlot, T ² ; Legault, C ² ; Naveau, J ² ;

作者机构： 1.INRA, Genet Quantitat & Appl Stn, F-78352 Jouy En Josas, France

2.INRA, Genet Quantitat & Appl Stn, F-78352 Jouy En Josas, France; Pen Ar Lan, F-35380 Maxent, France; Shanghai Acad Agr Sci, Inst Anim Sci & Husb, Shanghai 201106, Peoples R China

关键词： pigs;genetic parameters;performance trait;reproductive trait;Chinese breed

期刊名称：GENETICS SELECTION EVOLUTION （ 影响因子：4.297； 五年影响因子：4.925 ）

ISSN： 0999-193X

年卷期： 2000 年 32 卷 1 期

页码：

收录情况： SCI

摘要： 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.