2012 Fiscal Year Final Research Report

Linkage-map based study of natural selection acting on the hybrid zonesbetween Pinus pumila and P. parviflora

Research Project

Project/Area Number	22370030
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Research Field	Biodiversity/Systematics
Research Institution	Chiba University
Principal Investigator	WATANO Yasuyuki 千葉大学, 大学院・理学研究科, 教授 (70192820)
Co-Investigator(Renkei-kenkyūsha)	TSUMURA Yoshihiko 森林総合研究所, 森林遺伝研究領域, 室長 (20353774) KAJITA Tadashi 千葉大学, 大学院・理学研究科, 准教授 (80301117)
Project Period (FY)	2010 – 2012
Keywords	系統 / 遺伝子浸透
Research Abstract	Genetic structures of three hybrid zones (Mt. Hakkoda, Mt. Zao and Mt. Tanigawa) were analyzed by using 34 marker loci mapped on a linkage-map in order to detect natural selection acting on the hybrid zones. Statistically significant deviations of allele frequencies were detected at4 marker loci consistently across all hybrid zones. It is suggested that natural selection would act on the 4 loci. Additionally, we found that the hybrid population in Mt. Zao showed the least level of linkage disequilibrium, suggesting that genetic fusion between the two parental species is highly developed in Mt. Zao.