McCauley David E
Department of Biology, Vanderbilt University, Nashville, Tennessee, 37235.
Evolution. 1998 Feb;52(1):255-260. doi: 10.1111/j.1558-5646.1998.tb05159.x.
Sex expression in gynodioecious plants is often determined by an interaction between biparentally and maternally inherited genes. Their relative rates of gene flow should be considered when modeling the evolution of the sex ratio in structured populations. In order to understand patterns of gene flow in Silene vulgaris, a gynodioecious plant, genetic structure was estimated from biparentally inherited genetic markers (allozymes) and a maternally inherited marker (chloroplast DNA) using Wright's F . Based on data from 16 local populations, chloroplast DNA showed considerably more genetic structure than did allozymes (F values of 0.62 and 0.22, respectively). This suggests that the rate of gene flow is about three times greater for nuclear genes.
雌雄异株植物的性别表达通常由双亲遗传基因和母系遗传基因之间的相互作用决定。在构建结构化种群中性别比例的进化模型时，应考虑它们相对的基因流速率。为了了解普通麦瓶草（一种雌雄异株植物）的基因流模式，利用赖特氏F统计量，从双亲遗传的遗传标记（等位酶）和母系遗传的标记（叶绿体DNA）估算了其遗传结构。基于16个当地种群的数据，叶绿体DNA显示出比等位酶更多的遗传结构（F值分别为0.62和0.22）。这表明核基因的基因流速率大约是叶绿体基因的三倍。
