RRC ID 50269
著者 Hanschen ER, Herron MD, Wiens JJ, Nozaki H, Michod RE.
タイトル Repeated evolution and reversibility of self-fertilization in the volvocine green algae.
ジャーナル Evolution
Abstract Outcrossing and self-fertilization are fundamental strategies of sexual reproduction, each with different evolutionary costs and benefits. Self-fertilization is thought to be an evolutionary "dead-end" strategy, beneficial in the short term but costly in the long term, resulting in self-fertilizing species that occupy only the tips of phylogenetic trees. Here, we use volvocine green algae to investigate the evolution of self-fertilization. We use ancestral-state reconstructions to show that self-fertilization has repeatedly evolved from outcrossing ancestors and that multiple reversals from selfing to outcrossing have occurred. We use three phylogenetic metrics to show that self-fertilization is not restricted to the tips of the phylogenetic tree, a finding inconsistent with the view of self-fertilization as a dead-end strategy. We also find no evidence for higher extinction rates or lower speciation rates in selfing lineages. We find that self-fertilizing species have significantly larger colonies than outcrossing species, suggesting the benefits of selfing may counteract the costs of increased size. We speculate that our macroevolutionary results on self-fertilization (i.e., non-tippy distribution, no decreased diversification rates) may be explained by the haploid-dominant life cycle that occurs in volvocine algae, which may alter the costs and benefits of selfing.
巻・号 72(2)
ページ 386-398
公開日 2018-2-1
DOI 10.1111/evo.13394
PMID 29134623
PMC PMC5796843
MeSH Biological Evolution* Self-Fertilization* Volvox / genetics*
IF 3.698
引用数 13
リソース情報
藻類 NIES-566 NIES-571 NIES-564 NIES-418 NIES-2457 NIES-1711 NIES-1713 NIES-1038 NIES-653 NIES-851 NIES-872 NIES-2428 NIES-541 NIES-732 NIES-544 NIES-3780 NIES-568 NIES-1362 NIES-460 NIES-856 NIES-456 NIES-3388 NIES-2738 NIES-543 NIES-545 NIES-574 NIES-572