A research on evolutionary process of reproductive isolation based on comparative analysis between multiple hybrid zones among lineages of Plestiodon of the Japanese main islands

2014 Fiscal Year Final Research Report

• Project/Area Number: 24770080
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Biodiversity/Systematics
• Research Institution: Kyoto University
• Principal Investigator: OKAMOTO Taku 京都大学, 理学(系)研究科(研究院), 助教 (80554815)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 交雑帯 / 集団遺伝学 / 系統地理学 / 生殖隔離 / 爬虫類

Outline of Final Research Achievements

Totally, four genetic lineages of three species of Plestiodon (Scincidae, Reptilia) occur in Japan mainland with parapatric distributions. At first, P. finitimus was described as a new species, and distribution and hybridization of native and non-native populations on Hachijojima Island were clarified. Next, molecular phylogenetic analyses suggested divergences of these lineages occurred in 6 to 2 MYA. Then, different genetic structure of the contact zones between these lineages were clarified by population genetic analyses using newly developed microsatellite markers in addition to known DNA markers. The differences in genetic structures could be interpreted as a results of differences in degree and mechanisms of reproductive isolation, reflecting differences among historical background of the contact zones.

Free Research Field

系統地理学