中国西门塔尔牛肉用群体重要经济性状遗传参数估计

doi:10.11843/j.issn.0366-6964.2016.09.009

Abstract

Abstract:

This experiment was conducted to estimate the variance component and genetic parameters including heritability and genetic correlation for economic important traits of 2 939 Simmental beef cattle that were born between 2008 and 2013.These parameters were estimated using derivative-free restricted maximum likelihood method.We found that the estimation of heritability for birth weight，weaning weight，marketing weight，carcass weight，dressing percentage and meat percentage were 0.48，0.44，0.43，0.38，0.31 and 0.39，respectively.Furthermore，the genetic correlation between birth weight and weaning weight，marketing weight and carcass weight，dressing percentage and meat percentage were 0.57，0.94 and 0.89，respectively.The heritabilities of these development traits and carcass traits in Chinese Simmental beef cattle population belong to medium and high heritability，and these traits had high genetic correlation values.Our study conducted the system analysis on genetic parameters of important economic traits in Chinese Simmental beef cattle.And the results lay the foundation for further breeding scheme and genetic evaluation.

Key words: Chinese Simmental beef cattle population, derivative-free restricted maximum likelihood, variance component, genetic parameters

CLC Number:

S823
S813.3

NIU Hong，BAO Jin-shan，WU Yang，ZHU Bo，ZHANG Wen-gang，XIA Jiang-wei，SONG Yu-xin，GUO Peng，XU Ling-yang，CHEN Yan，GAO Xue，ZHANG Lu-pei，GAO Hui-jiang，LI Jun-ya. Estimation of Genetic Parameters for Economic Important Traits in Chinese Simmental Beef Cattle[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2016, 47(9): 1817-1823.

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Estimation of Genetic Parameters for Economic Important Traits in Chinese Simmental Beef Cattle

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