2009 Fiscal Year Final Research Report

Genetical study on hybrid lethality in interspecific crosses of tobacco

Research Project

Project/Area Number	20880024
Research Category	Grant-in-Aid for Young Scientists (Start-up)
Allocation Type	Single-year Grants
Research Field	Breeding science
Research Institution	Osaka Prefecture University
Principal Investigator	TEZUKA Takahiro Osaka Prefecture University, 生命環境科学研究科, 助教 (20508808)
Project Period (FY)	2008 – 2009
Keywords	雑種致死 / 生殖的隔離機構 / 種間交雑 / 遠縁交雑 / 遺伝解析 / タバコ
Research Abstract	Hybrid lethality, observed in hybrid embryos and seedlings, is obstacle to introducing desirable genes into cultivars through wide crosses. In this study, genetic analysis on hybrid lethality observed in interspecific crosses between cultivated species and wild species of tobacco was conducted. We revealed that wild species has a single gene causing hybrid lethality by three-way crosses. We also revealed whether hybrid lethality is observed in crosses of many wild species with the cultivated species.