An analysis of G matrix variation in two closely related cricket species, Gryllus firmus and G-pennsylvanicus
An analysis of G matrix variation in two closely related cricket species, Gryllus firmus and G-pennsylvanicus
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DOI：
10.1046/j.1420-9101.2001.00258.x
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发表时间：
2001-01-01
影响因子：
2.1
通讯作者：
Roff, DA
中科院分区：
文献类型：
--
作者：
Bégin, M;Roff, DA
进化生物学的一个重要问题是理解自然群体中 G 矩阵变异的模式。我们根据两种蟋蟀物种（Gryllusfirmus 和 G.pennsylvanicus）的形态特征估计了四个 G 矩阵，每种蟋蟀都在两种环境中饲养。我们使用了三种矩阵比较方法，包括 Flury 层次结构，来提高我们感知矩阵变化各个方面的能力。我们的结果表明，不同的方法感知矩阵的不同方面，这表明，在对这些方法有更多了解之前，未来的研究应该使用几种不同的统计方法。我们还发现，物种内 G 矩阵的差异可能大于物种之间的差异。我们的结论是，遗传结构的表达可能随环境而变化，未来的研究应该比较多个环境中的 G 矩阵。我们还得出结论，G 矩阵可以在密切相关的物种水平上保守。
An important issue in evolutionary biology is understanding the pattern of G matrix variation in natural populations. We estimated four G matrices based on the morphological traits of two cricket species, Gryllus firmus and G. pennsylvanicus, each reared in two environments. We used three matrix comparison approaches, including the Flury hierarchy, to improve our ability to perceive all aspects of matrix variation. Our results demonstrate that different methods perceive different aspects of the matrices, which suggests that, until more is known about these methods, future studies should use several different statistical approaches. We also found that the differences in G matrices within a species can be larger than the differences between species. We conclude that the expression of the genetic architecture can vary with the environment and that future studies should compare G matrices across several environments. We also conclude that G matrices can be conserved at the level of closely related species.