Genetic parameters for maternal behaviour traits in sows
Genetic parameters for maternal behaviour traits in sows
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DOI：
10.1016/j.livsci.2007.04.006
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发表时间：
2008-03-01
影响因子：
1.8
通讯作者：
Kalm, E.
中科院分区：
文献类型：
--
作者：
Gaede, S.;Bennewitz, J.;Kalm, E.
利用德国32个核心群和倍率群的数据，估计了母猪5种母性行为特征的方差成分和育种值。使用动物阈值模型进行单变量估计。其中包括2003年12月至2005年7月期间记录的约31,000例分娩。群体行为遗传系数为0.07(0.06)，待人态度遗传系数为0.06(0.03)，母性能力遗传系数为0.05(0.01)，碾碎仔猪遗传系数为0.03(0.01)，野蛮仔猪遗传系数为0.02（0.02）。此外，利用线性模型对行为性状之间和行为性状与窝产仔数之间的遗传相关性进行多变量估计。低遗传率和与出生窝产仔数的弱遗传相关性表明，可能很难从遗传上改善母亲的行为，而且选择更好的母亲能力并不一定伴随着出生窝产仔数的减少。(c) 2007 Elsevier B.V.版权所有
Data from 32 nucleus and multiplier herds in Germany was used to estimate variance components and breeding values for five maternal behaviour traits in sows. The estimation was performed univariately using an animal threshold model. About 31,000 farrowings recorded from December 2003 until July 2005 were included. The heritability coefficients were 0.07 (0.06) for group behaviour, 0.06 (0.03) for attitude to people, 0.05 (0.01) for maternal ability, 0.03 (0.01) for crushing of piglets and 0.02 (0.02) for savaging of piglets. Additionally, genetic correlations between the behaviour traits and between the behaviour traits and litter size, respectively, were estimated multivariately by REML with a linear model. Low heritability and weak genetic correlation to litter size at birth indicate that it may be difficult to genetically improve the maternal behaviour, and that selection for better mothering ability is not necessarily accompanied by reduced litter size at birth. (c) 2007 Elsevier B.V. All rights reserved.