Population structure and quantitative characters.
Population structure and quantitative characters.
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人口结构及数量特征。
作者：
Alan R. Rogers;Henry Harpending
用迁移矩阵模型研究了中性多基因性状在细分群体中的行为。结果表明，配子不平衡对群体间方差有很大影响，但对群体间方差的期望值没有影响。组间方差的差异是巨大的，不依赖于性状中贡献方差的基因座的数量。对于具有相同加性方差的多基因性状，它与单个位点一样大。这意味着一个多基因性状所包含的种群关系信息与一个单位点标记所包含的信息完全相同。将这一理论与观察到的布干维尔岛居民皮肤纹和人体特征的分化进行了比较。
A migration matrix model is used to investigate the behavior of neutral polygenic characters in subdivided populations. It is shown that gametic disequilibrium has a large effect on the variance among groups but none at all on its expectation. The variance of among-group variance is substantial and does not depend on the number of loci contributing to variance in the character. It is just as large for polygenic characters as for single loci with the same additive variance. This implies that one polygenic character contains exactly as much information about population relationships as one single-locus marker. The theory is compared with observed differentiation of dermatoglyphic and anthropometric characters among Bougainville islanders.