| Project/Area Number |
10660001
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Breeding science
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
INUKAI Tsuyoshi Hokkaido Univ., Grad. School of Agr., Inst., 大学院・農学研究科, 助手 (90223239)
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| Co-Investigator(Kenkyū-buntansha) |
SANO Yoshio Hokkaido Univ., Grad. School of Agr., Pro., 大学院・農学研究科, 教授 (70109528)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1999: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1998: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | Oryza sativa / wx gene / Genetic recombination / Oryza sativa / 遺伝的組換え |
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| Research Abstract |
In plant genomes as well as other eukaryotic genomes meiotic recombination does not occur uniformly. At the level of the gene, high recombination frequencies are often observed within genetic loci in maize, but this feature of intragenic recombination is not seen at the csr1 locus in Arabidopsis. These observations suggest that meiotic recombination in plant genomes varies considerably among species. In the present study we investigated meiotie recombination at the wx locus in rice. The mutation sites of wx mutants induced by ethyl methanesulfonate (EMS) treatment or gamma-ray irradiation and a spontaneous wx mutant were physically characterized, and the genetic distances between those wx mutation sites were estimated by pollen analysis. Based on these results, the recombination frequency at the wx locus in rice was estimated as 27.3 kb/cM, which was about ten times higher than the average for the genome, suggesting that there was a radically different rate of meiotic recombination for intra- and intergenie regions in the rice genome.
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