Ecogenomics studies for the genetic basis of adaptive speciation

2017 Fiscal Year Final Research Report

• Project/Area Number: 26251044
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Ecology/Environment
• Research Institution: Kyoto University
• Principal Investigator: Sota Teiji 京都大学, 理学研究科, 教授 (00192625)
• Co-Investigator(Renkei-kenkyūsha): NIIMI Teruyuki 基礎生物学研究所, 進化発生研究部門, 教授 (00293712)
• Research Collaborator: OKUZAKI Yutaka ; FUJISAWA Tomochika ; KOMURAI Ryohei ; SUGAWARA Hisashi ; NOMURA Shota
• Project Period (FY): 2014-06-27 – 2018-03-31
• Keywords: 種分化 / 生殖隔離 / 適応進化 / 体サイズ / 交尾器形態 / ゲノム解読 / QTL解析 / オサムシ

Outline of Final Research Achievements

Revealing the genetic basis of traits for reproductive isolation based on the analysis of the whole genome is an important subject in evolutionary ecology. In Carabus (Ohomopterus) beetles, differences in genital morphology and body size contribute to pre-zygotic reproductive isolation, and diversification in these traits contributes to species the richness and formation of multi-species assembly. We sequenced the whole genome of representative species and searched for QTLs and candidate genes for species-specific genital morphology and body size differences. For genital morphology, we investigated QTLs for species-specific genital dimensions between C. iwawakianus and C. maiyasanus, referring to the whole genome sequence of C. uenoi. For body size, we investigated QTLs for body size dimensions using a crossing between two populations in C. japonicus. For both traits, we found a few QTLs with large phenotypic effects and revealed candidate genes located in the QTL regions.

Free Research Field

進化生態学