论文标题
在高生殖变化条件下的总共识
Total consensus under high reproductive-variance conditions
论文作者
论文摘要
谱系的星形分支模式在海洋物种中很常见。高频率海洋人群的特征是有效与实际人口大小的比率较低，这反映了父母在大众产卵中生殖成功的差异。当发生极端的繁殖事件时，很少有父母的后代占主导地位（从而出现多次合并或与星状树的谱系子集），因此，遗传多样性的丧失是显着的。在较高的繁殖变化条件下（假设从帕累托分布中取样发生繁殖），本文探讨了杂合性在世代相传的分布。结果表明，没有实现零杂合性，这意味着人口可能会下降而没有明显的遗传变异损失。还发现杂合性分布中存在奇异性。但是，在较高的生殖方差的情况下，奇异点的位置略微偏离了Wright-Fisher采样发生的繁殖的情况。
Star-shaped branching patterns of genealogies are common in marine species. High-fecundity marine populations are characterized by low ratios of effective to actual population size, which reflect high variance in reproductive success among parents in mass spawns. When extreme reproduction events occur, offspring from very few parents dominate the population (whereby multiple mergers, or subsets of lineages with star-like trees, arise) and thus, the loss of genetic diversity is significant. Under high reproductive-variance conditions (assuming that reproduction occurs by sampling from the Pareto distribution), this paper explores the distribution of heterozygosity across generations. The result shows that zero heterozygosity is not achieved, implying that the populations may decline without evident loss of genetic variation. It is also found that there are singularities in the heterozygosity distributions. However, in the case of high reproductive variance, the locations of the singular points subtly deviate from those of the case where reproduction occurs by Wright-Fisher sampling.
