Evaluation of rice domestication by loss of seed shattering

2016 Fiscal Year Final Research Report

• Project/Area Number: 26450003
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Science in genetics and breeding
• Research Institution: Kobe University
• Principal Investigator: Ishikawa Ryo 神戸大学, 農学研究科, 助教 (70467687)
• Co-Investigator(Renkei-kenkyūsha): IKEDA KEN-ICHI 神戸大学, 大学院・農学研究科, 准教授 (40437504)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 栽培イネ / 野生イネ / 脱粒性 / 栽培化

Outline of Final Research Achievements

Loss of seed shattering was one of the key phenotypic changes selected for in the domestication of many crop species. Asian cultivated rice, Oryza sativa L., was domesticated from its wild ancestor, O. rufipogon, and three seed-shattering loci, qSH1, sh4 and qSH3, have been reported to be involved in the loss of seed shattering in cultivated rice. In this study, we analysed the seed-shattering behaviour of wild rice using introgression lines carrying the cultivated alleles from O. sativa Nipponbare in the genetic background of wild rice, O. rufipogon W630.　We found that the interaction of mutations at these two loci may have played a role in the initial loss of seed shattering during rice domestication.

Free Research Field

植物遺伝育種学