Kelley Steven E
Department of Botany, Duke University, Durham, NC, 27706.
Evolution. 1989 Aug;43(5):1066-1074. doi: 10.1111/j.1558-5646.1989.tb02551.x.
This study tests the hypothesis that competition among groups of sexual and asexual siblings generates an advantage for sexual females. Individual tillers of Anthoxanthum odoratum were planted singly, among other siblings from the same family, and among groups of sexual and asexual siblings from different families in pots in an unheated greenhouse. Unlike previous field experiments, there was little difference between the performance of sexual and clonal tillers after two years, despite strong treatment effects and high mortality. The results demonstrate that sib competition does not generate an advantage for sexual reproduction in biotically simple environments.
有性和无性同胞群体之间的竞争为有性繁殖的雌性带来了优势。将香茅草的单个分蘖单独种植，与来自同一家族的其他同胞一起，以及与来自不同家族的有性和无性同胞群体一起，种植在未加热温室的花盆中。与之前的田间实验不同，尽管处理效果显著且死亡率很高，但两年后有性和克隆分蘖的表现几乎没有差异。结果表明，在生物环境简单的情况下，同胞竞争并不会为有性繁殖带来优势。
