Estimates of (co)variance components for direct and maternal effects on birth weight of Karayaka lambs

被引：0
|
作者：
Zafer Ulutas
Emre Sirin
Yüksel Aksoy
Aziz Sahin
Mehmet Kuran
机构：
[1] Gaziosmanpasa University,Faculty of Agriculture, Department of Animal Science
[2] Ondokuz Mayis University,Faculty of Agriculture, Department of Animal Science
来源：
Tropical Animal Health and Production | 2013年 / 45卷
关键词：
Maternal heritability; Direct heritability; Best model; Log-likelihood; Animal model;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The purpose of this study was to estimate the genetic parameters for birth weight of Karayaka lambs by separating direct genetic, maternal genetic, and maternal permanent environmental effects. Records of 1013 Karayaka lambs born between 2005 and 2010 were analyzed. Six different animal models were examined, all including direct additive genetic variance and various combinations of genetic and environmental maternal effects. The most appropriate model was chosen based on log-likelihood ratio tests. Since model 1 had the smallest likelihood value, it was chosen as the best model in this study. Depending on the model, direct heritability varied from 0.37 to 0.55 and maternal heritability ranged from 0.08 to 0.20 for birth weight.
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页码：953 / 956
页数：3
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