Venable D Lawrence, Búrquez M Alberto
Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, 85721, USA.
Centro de Ecología, Universidad Nacional Autónoma de México, Mexico City, 04510, MÉXICO.
Evolution. 1990 Nov;44(7):1748-1763. doi: 10.1111/j.1558-5646.1990.tb05246.x.
We have investigated phenotypic, environmental, within-population broad-sense genetic correlations and among-population genetic correlations for 17 traits in six populations of Heterosperma pinnatum Cav. (Compositae) grown in the greenhouse. The within-population genetic, environmental, and phenotypic correlations were somewhat similar while the among-population genetic correlations showed little correspondence to these. The different correlation matrices were compared to a hypothesis matrix, which predicted higher correlations for groups of functionally and developmentally related traits. The groups were seed and head traits, size and shape traits, and life history traits, with subgroups predicted to have still higher correlations. The phenotypic and environmental matrices corresponded well to the hypothesis matrix, the within-population broad-sense genetic matrix showed weaker, though still significant, correspondence, and the among-population genetic correlations showed no correspondence. Genetic correlations did not differ significantly among populations, though the power of these comparisons was low. Some particular genetic correlations are discussed as possible examples of adaptive correlations (e.g., a negative correlation between dispersal and dormancy) and as examples of developmental or physiological constraints including life-history tradeoffs.
我们对温室中生长的六个人字果（菊科）种群的17个性状进行了表型、环境、种群内广义遗传相关性以及种群间遗传相关性的研究。种群内的遗传、环境和表型相关性有些相似，而种群间的遗传相关性与这些相关性几乎没有对应关系。将不同的相关矩阵与一个假设矩阵进行比较，该假设矩阵预测功能和发育相关性状组的相关性更高。这些组包括种子和头状花序性状、大小和形状性状以及生活史性状，预计亚组的相关性更高。表型和环境矩阵与假设矩阵吻合良好，种群内广义遗传矩阵显示出较弱但仍显著的对应关系，而种群间遗传相关性则没有对应关系。尽管这些比较的效力较低，但遗传相关性在不同种群间没有显著差异。讨论了一些特定的遗传相关性，作为适应性相关性的可能例子（例如，扩散与休眠之间的负相关）以及作为包括生活史权衡在内的发育或生理限制的例子。
