Comparative Estimation on Three-Way Heterosis in Pigs Reveals Genetic Bias of the Widely Used Empirical Formula
文献类型: 外文期刊
第一作者: Li, Xiang
作者: Li, Xiang;Zhang, Yubo;Yu, Mei;Liu, Bang;Fan, Bin;Peng, Zhongzhen;Zhao, Shu-hong;Zhu, Mengjin;Tang, Zhonglin;Xu, Shanping
作者机构:
关键词: Pigs;3-way heterosis;empirical formula;Cockerham's model;genetic component;genetic bias
期刊名称:JOURNAL OF ANIMAL AND VETERINARY ADVANCES ( 影响因子:0.365; 五年影响因子:0.359 )
ISSN: 1680-5593
年卷期: 2009 年 8 卷 6 期
页码:
收录情况: SCI
摘要: The objective of this study is to explore the genetic bias of the empirical formula which was widely used to estimate the magnitude of 3-way heterosis in the pig industry of China. Additive and dominance genetic components partitioned from the Cockerham's model were used to derive the expectation of the heterosis effect from the 3-way crossbreds, which witnessed that the theoretical genetic bias of the expectation between the empirical formula and the Cockerham's model is half of the magnitude of heterosis of F, single-cross. Following this research, we made a case analysis to reveal the difference of 3-way heterosis between the empirical formula and the Cockerham's model by using the field performance test data of economically important traits involving in growth, carcass and meat quality traits in pigs. The results indicated that the veracity of the empirical formula for 3-way heterosis estimation is conditional and for those traits with remarkable heterosis effects in F, single-cross generation, other alternative estimation methods should be taken into account.
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