摘要
Ancient whole-genome duplication （WGD）, or polyploidy, dramat- ically changed the size, content, and complexity of the genome （Figure 1）. Preferential gene retention, functional divergence, and regulatory network complexity after expansion of genetic material potentially result in key innovations, phenotypic novelty, and thereafter may serve as a catalyst for speciation and diversification （Soltis and Soltis, 2016）. Furthermore, WGD has been identified in many lineages, including ciliates, fungi, vertebrates, and plants, and often seems to be accompanied by species rich groups, especially in angiosperms.
Ancient whole-genome duplication （WGD）, or polyploidy, dramat- ically changed the size, content, and complexity of the genome （Figure 1）. Preferential gene retention, functional divergence, and regulatory network complexity after expansion of genetic material potentially result in key innovations, phenotypic novelty, and thereafter may serve as a catalyst for speciation and diversification （Soltis and Soltis, 2016）. Furthermore, WGD has been identified in many lineages, including ciliates, fungi, vertebrates, and plants, and often seems to be accompanied by species rich groups, especially in angiosperms.
