MAINTENANCE AND BREAKDOWN OF DISTYLY
MAINTENANCE AND BREAKDOWN OF DISTYLY
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DOI：
10.1086/283497
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发表时间：
1979-01-01
影响因子：
2.9
通讯作者：
CHARLESWORTH, D
中科院分区：
文献类型：
--
作者：
CHARLESWORTH, B;CHARLESWORTH, D
本文用代数方法分析了异型种群中选择与重组的对立所达到的平衡。当自交后代的适合度与异交后代的适合度相比足够小时，可以预期自交可育重组表型的频率与相应的交换事件的频率具有大致相同的数量级。人口调查数据表明，这些频率必须小于10-3。本文还讨论了异型花柱表基因组成基因座排序的可能性。由于异型花柱的崩溃，例如，昆虫授粉效率低下的原因也进行了研究。具有花粉类型显性等位基因的自花可育的同花柱通常会取代异花柱。这同意的数据，一些属既含有异型花柱和secondarily同型花柱的物种。
An algebraic analysis of the equilibrium reached as a result of the opposition of selection and recombination in a heterostyled population is described. When the fitness of a selfed progeny is sufficiently small compared with that of outcrossed progeny, the frequencies of the self-fertile recombinant pbenotypes can be expected to be of roughly the same order of magnitude as the frequencies of the corresponding crossover events. Data from population surveys suggest that these frequencies must be less than 10-3. The possibility of ordering the component loci of the heterostyly supergene is discussed. The breakdown of heterostyly due, e.g., to inefficient insect pollination is also investigated. The self-fertile homostyle with the dominant allele for pollen type will usually replace heterostyly. This agrees with data on a number of genera containing both heterostyled and secondarily homostyled species.