Jernigan Robert W, Culver David C, Fong Daniel W
Department of Mathematics and Statistics, The American University, Washington, D.C., 20016.
Department of Biology, The American University, Washington, D.C., 20016.
Evolution. 1994 Jun;48(3):587-596. doi: 10.1111/j.1558-5646.1994.tb01346.x.
The patterns of genetic correlations between a series of eye and antenna characters were compared among two sets of spring-dwelling and cave-dwelling populations of Gammarus minus. The two sets of populations originate from different drainages and represent two separate invasions of cave habitats from surface-dwelling populations. Matrix correlations, using permutation tests, indicated significant correlations both between populations in the same basin and from the same habitat. The technique of biplot, which allows for the simultaneous consideration of relationships between different genetic correlations and different populations, was used to further analyze the correlation structure. A rank-3 biplot indicated that spring and cave populations were largely differentiated by eye-antennal correlations, whereas basins were differentiated by both eye-antennal and antennal-antennal correlations. Eye-antennal correlations, which are likely to be subject to selection, were most similar within habitats, which are likely to have similar selective regimes.
在两组微小钩虾（Gammarus minus）的春季栖息种群和洞穴栖息种群中，比较了一系列眼睛和触角特征之间的遗传相关模式。这两组种群来自不同的排水区域，代表了从地表栖息种群对洞穴栖息地的两次独立入侵。使用排列检验的矩阵相关性表明，同一流域内和相同栖息地的种群之间均存在显著相关性。双标图技术允许同时考虑不同遗传相关性与不同种群之间的关系，用于进一步分析相关结构。一个三阶双标图表明，春季和洞穴种群在很大程度上通过眼-触角相关性区分，而流域则通过眼-触角和触角-触角相关性区分。可能受到选择作用的眼-触角相关性在可能具有相似选择机制的栖息地内最为相似。
