A note on genetic parameters for estrus symptoms in sows
A note on genetic parameters for estrus symptoms in sows
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DOI：
10.1016/j.applanim.2007.04.004
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发表时间：
2008-02-01
影响因子：
2.3
通讯作者：
Kalm, Ernst
中科院分区：
文献类型：
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作者：
Gaede, Sibylle;Bennewitz, Joern;Kalm, Ernst
表现出明显的发情症状有助于母猪的繁殖效率。该研究的目的是估计发情症状的遗传参数和育种价值，发情症状包括外阴肿胀和发红，对公猪的兴趣和站立反射的强度。在农场上，使用顺序量表（五类）对来自三个品系的约31,000个繁殖母猪周期进行评分。方差分量估计采用阈值模型。加性遗传方差、永久环境方差、遗传力和可重复性的估计值分别为0.10（0.02）、0.06（0.02）、0.09（0.02）和0.14（0.02）。发情症状与出生产仔数的遗传相关性很弱（-0.05 +/- 0.04）。似乎对发情症状特征的选择是可能的，并且不伴随着产仔数的变化。(c) 2007 Elsevier B.V.版权所有
Showing clear estrus symptoms contributes to the reproductive effectiveness of a sow. The aim of the study was to estimate genetic parameters and breeding values for estrus symptoms, a trait which included swelling and reddening of the vulva, interest in the boar and strength of the standing reflex. Around 3 1,000 reproductive sow cycles from three lines were scored on farms, using an ordinal scale (five categories). Variance component estimation was done by applying a threshold model. The estimates for the additive genetic variance, permanent environmental variance, heritability and repeatability are (standard errors in parenthesis) 0.10 (0.02), 0.06 (0.02), 0.09 (0.02) and 0.14 (0.02), respectively. The genetic correlation between estrus symptoms and litter size at birth was very weak (-0.05 +/- 0.04). It seems that a selection for the trait estrus symptoms is possible and is not accompanied by a change in the litter size. (c) 2007 Elsevier B.V. All rights reserved.