Estimation of genetic mechanism on ecotype determination in rice

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K19216
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 39:Agricultural and environmental biology and related fields
• Research Institution: Kobe University
• Principal Investigator: Ishii Takashige 神戸大学, 農学研究科, 教授 (20260648)
• Project Period (FY): 2018-06-29 – 2021-03-31
• Keywords: 野生イネ / 生態型 / Oryza rufipogon

Outline of Final Research Achievements

In Asian wild rice, two ecotypes are related to the reproductive strategies. Genetic mechanism on ecotype determination was estimated by focusing on the stolons. Genetic analysis for stolon production ability (SPA) was carried out using the segregating population between a wild accession (with SPA) and a cultivar (without SPA), and three significant loci were estimated. At all loci, wild alleles worked positively for SPA, and they showed additive effects to each other.

Free Research Field

植物育種学

Academic Significance and Societal Importance of the Research Achievements

植物は季節変化や生育環境に応じた生態型に基づき、様々な生存・生殖戦略をとっている。本研究では、2つの異なる生態型が同一種内でみられるアジアの野生イネを研究対象として、生態型の違いを導く器官と考えられる匍匐枝に注目し、その形成能力に関する遺伝解析を行った。研究成果は、植物全般における生態型決定機構の解明、さらには種子生産性に関わる農学の分野における新たな知見の提供につながるものである。