Evolution of genetically correlated traits: Tooth size and body size in baboons
Evolution of genetically correlated traits: Tooth size and body size in baboons
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DOI：
10.1002/ajpa.20435
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发表时间：
2006-11-01
影响因子：
2.8
通讯作者：
Mahaney, Michael C.
中科院分区：
文献类型：
--
作者：
Hlusko, Leslea J.;Lease, Loren R.;Mahaney, Michael C.
在一个群体中，只有受基因影响的表型变异才会对选择做出反应。众所周知，具有多效性的基因会影响许多性状，这使得我们对它们随时间的进化的理解变得更加复杂。在这里，我们使用定量遗传分析来识别和估计西南国家灵长类动物研究中心饲养的纯系狒狒繁殖群体中摩尔大小和躯干长度之间的共同遗传效应。虽然树冠面积与躯干长度具有遗传相关性，但特定的线性测量会产生不同的结果。我们发现磨牙颊舌宽度和躯干长度的变化受到重叠的加性遗传效应的影响。相比之下，近远中磨牙长度似乎在遗传上与体型无关。这是第一项证明灵长类动物牙齿大小和体型之间存在显着遗传相关性的研究。讨论了进化的意义。
Within a population, only phenotypic variation that is influenced by genes will respond to selection. Genes with pleiotropic effects are known to influence numerous traits, complicating our understanding of their evolution through time. Here we use quantitative genetic analyses to identify and estimate the shared genetic effects between molar size and trunk length in a pedigreed, breeding population of baboons housed at the Southwest National Primate Research Center. While crown area has a genetic correlation with trunk length, specific linear measurements yield different results. We find that variation in molar buccolingual width and trunk length is influenced by overlapping additive genetic effects. In contrast, mesiodistal molar length appears to be genetically independent of body size. This is the first study to demonstrate a significant genetic correlation between tooth size and body size in primates. The evolutionary implications are discussed.