Identification of genes responsible for interspecific incompatibility and hybrid embryo breakdown

2014 Fiscal Year Final Research Report

• Project/Area Number: 24380002
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Breeding science
• Research Institution: Tohoku University
• Principal Investigator: NISHIO Takeshi 東北大学, (連合)農学研究科(研究院), 教授 (30301039)
• Co-Investigator(Kenkyū-buntansha): KITASHIBA Hiroyasu 東北大学, 大学院農学研究科, 准教授 (80431542)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 種間交雑 / 生殖的隔離 / 不和合性 / 胚発達 / アブラナ

Outline of Final Research Achievements

A QTL for interspecific incompatibility of Brassica rapa to Brassica oleracea pollen was delimited to 3.7-Mb region on chromosome 2, and three genes were found to be candidates for the interspecific-incompatibility gene by nucleotide sequencing of genes in this region. Two QTLs for hybrid embryo breakdown of B. rapa in intergeneric hybridization with Raphanus sativus were detected in repeated investigations, and BrFIEa and BrMSI1a were identified as candidates for the genes participating in hybrid embryo breakdown. Interestingly, these QTLs may also responsible for embryo breakdown in interspecific hybridization with Brassica napus and Brassica nigra.

Free Research Field

遺伝育種科学