Male Bias in Distributions of Additive Genetic, Residual, and Phenotypic Variances of Shared Traits
Male Bias in Distributions of Additive Genetic, Residual, and Phenotypic Variances of Shared Traits
复制标题
共有性状的加性遗传、残留和表型变异分布中的男性偏差
作者：
Minyoung J. Wyman;L. Rowe
尽管男性和女性之间有着共同的遗传结构，但性别差异是普遍存在的。这种共享的遗传结构的程度，反映在两性间的遗传相关性，以前已经与共享性状的表型性二型性的程度。然而，性别特异性加性遗传方差的差异幅度也可能助长性二型性。为了探讨加性遗传方差二态性与表型二态性之间的相关性，我们进行了文献检索。我们的目标是在两种性别中表达的特征，并排除了性别限制的特征。加性遗传方差的性别间平均差异不显著。但加性遗传方差的性别差异分布存在明显的偏雄倾向。这种模式甚至在去除了与繁殖明确相关的特征后仍然存在。此外，男性性状有更多的残留和表型方差比同源女性性状（测量的平均值和偏），这种差异不一定是由于性性状和非性性状之间的差异。我们发现没有证据表明性染色体系统可以解释加性遗传、非加性遗传或表型变异中的性别差异。最后，我们发现了一个显着的加性遗传方差和表型性二型性的程度之间的相关性。了解为什么性状具有性别特异性的变异模式有待进一步研究。
Despite a shared genetic architecture between males and females, sexual differences are widespread. The extent of this shared genetic architecture, reflected in the intersexual genetic correlation, has previously been correlated with the extent of phenotypic sexual dimorphism in shared traits. However, the magnitude of the difference in sex-specific additive genetic variances may also fuel sexual dimorphism. To explore the correlation between additive genetic variance dimorphism and phenotypic dimorphism, we conducted a literature search. We targeted traits expressed in both sexes and excluded sex-limited traits. The mean difference between the sexes in additive genetic variance was not significantly different from 0. However, the distribution of the sexual difference in additive genetic variance had a significant male-biased skew. This pattern persists even after removing traits explicitly related to reproduction. Furthermore, male traits had more residual and phenotypic variance than homologous female traits (as measured by both the mean and the skew), and this difference was not necessarily due to the difference between sexual traits and nonsexual traits. We found no evidence that sex chromosome system could explain sex differences in additive genetic, nonadditive genetic, or phenotypic variances. Finally, we found a significant correlation between the extent of sexual dimorphism in additive genetic variances and the extent of phenotypic sexual dimorphism. Understanding why traits have sex-specific patterns of variation awaits further investigation.
解决座内性冲突：遗传机制和时间框架。
DOI：
10.1093/jhered/esq011
发表时间：
2010
期刊：
The Journal of heredity
影响因子：
--
作者：
Stewart,AndrewD;Pischedda,Alison;Rice,WilliamR
通讯作者：
Rice,WilliamR
影响因子：
3.3
作者：
D. Houle
通讯作者：
D. Houle
影响因子：
7
作者：
Zhang, Yong E.;Vibranovski, Maria D.;Long, Manyuan
通讯作者：
Long, Manyuan