Identification and characterization of gene controlling root growth angle in rice.

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K18630
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Science in genetics and breeding
• Research Institution: National Agriculture and Food Research Organization (2017); The University of Tokyo (2015-2016)
• Principal Investigator: KITOMI Yuka 国立研究開発法人農業・食品産業技術総合研究機構, 次世代作物開発研究センター, 契約研究員 (70746502)
• Research Collaborator: UGA Yusaku 国立研究開発法人農業・食品産業技術総合研究機構, 次世代作物開発研究センター, 上級研究員 (00391566)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: イネ / 根伸長角度 / QTL

Outline of Final Research Achievements

Deep root system is important trait to get unevenly-located water in the deeper soil layer in drought condition. To improve the ability of drought avoidance in crops by modifying root system architecture, we studied on newly identified QTLs, qSOR1 and DRO3, which control root growth angle in rice. We succeeded in isolation of qSOR1 gene and demonstration of qSOR1 expression levels and patterns in several tissues. qSOR1 works in auxin signaling pathway same as known root growth angle control gene DRO1, on the other hand, they regulate root growth angle independently. Fine mapping of DRO3 gene was also performed in this project. However, we could not narrow down the candidate region of DRO3 due to the other QTL(s) having opposite effect to DRO3 located near DRO3.

Free Research Field

植物遺伝育種学