A study on the hybrid speciation mechanism in plants using genome information

2014 Fiscal Year Final Research Report

• Project/Area Number: 24770081
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Biodiversity/Systematics
• Research Institution: Forestry and Forest Products Research Institute
• Principal Investigator: KIKUCHI Satoshi 独立行政法人森林総合研究所, 森林遺伝研究領域, 主任研究員 (10353658)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 網状進化 / 雑種種分化 / 系統解析

Outline of Final Research Achievements

Hybridization in plants is now considered as one of the important factor which
promotes speciation. We examined reticulate evolution in the genus Salix, by investigating phylogenetic relationships among Japanese willow species in the subgenus Vetrix and Chamaetia based on multiple nuclear genes. Phylogenetic network analysis did not support the hypothesis for diploid hybrid speciation of S. hukaoana which had been suspected of being derived from diploid hybrid between S. gracilystyla and S. rorida, although the phylogenetic incongruence in a few loci suggested introgression among them after speciation. In contrast, the other species displayed more complex evolutionary histories including reticulate events, and suggested that reticulate evolution has occurred extensively in the genus Salix.

Free Research Field

保全遺伝学、系統地理学、生態遺伝学