Enhancement of translocation ability in rice by annual gene from African rice, O. glaberrima

2014 Fiscal Year Final Research Report

• Project/Area Number: 24380006
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Breeding science
• Research Institution: Nagoya University
• Principal Investigator: DOI Kazuyuki 名古屋大学, 生命農学研究科, 准教授 (80315134)
• Co-Investigator(Kenkyū-buntansha): KITANO Hidemi 名古屋大学, 生物機能開発利用研究センター, 教授 (50144184)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: イネ / 一年生 / 収量 / 転流

Outline of Final Research Achievements

African rice (Oryza glaberrima) shows a strong annual growth habit compared with common Asian rice O. sativa. Genetic analysis of this annual growth habit indicated that the major causal QTLs were located on chromosomes 6, 7 and 8. Large scale QTL mapping of the QTL on chromosome 8 (qRA8) implied that qRA8 would be the same gene as heading date gene Hd5. Characterization of the CSSLs revealed that the CSSL for qRA8 has a higher yield potential because seed set on late panicles (atypical high position tillers) was observed. Other annual CSSL showed different characteristics from those for qRA8. By focusing on the growth habit, a new approach for improving rice yield was discovered.

Free Research Field

植物遺伝育種学