Analysis of heterosis caused by transposition burst of a transposon mPing in rice

• Project/Area Number: 23657006
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Genetics/Genome dynamics
• Research Institution: Kyoto University
• Principal Investigator: TSUKIYAMA Takuji 京都大学, 大学院・農学研究科, 助教 (00423004)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 転移因子 / ヘテロシス / ゲノム / 遺伝学 / 育種学

Research Abstract

We investigated molecular mechanisms of vigorous phenotype in vigorous growing revertants of a slender glume mutant IM294 in which a transposon mPing is actively transposing. We found that transposition burst of mPing is necessary forthe expression of vigorous phenotype. Moreover, we identified 20 mPing insertions within or near gens in vigorous mutant VGI1. These results documented that transposition burst of transposon greatly contributes in evolution of organisms.