Development of genetic tools for crop science using genome information -low-temperature germination in rice

尽管现有的水稻基因组数据库对农业有着巨大的潜在影响，但其有效应用需要更多的遗传工具，以便于了解农艺性状的遗传控制。该项目旨在开发此类工具（用于研究水稻农艺性状的数量性状基因座（QTL）的作图群体）。我们为绘制种群而开发的，即，Akihikari（低地粳稻）x IRAT 109重组自交系、Nekken 2（低地粳稻）x Gaya（低地籼稻）重组自交系、Kamenoo（低地粳稻）x Dular（雨养-低地籼稻）重组自交系和IR 36（低地籼稻）x Genjah Wangkal（高地粳稻）重组自交系。日本和中国的研究人员利用这些群体绘制了包括发芽力在内的许多农艺性状图谱。这些结果发表在《为什么农艺学需要QTL信息？在2005年日本作物科学学会年会上，我们还评估了与商业公司合作繁殖和分布这些种群的可能性。我们已经成功地与水稻生物技术领域的一些领先公司交换了意见和信息。

Although the current rice genome database potentially has great impact on agriculture, its effective application needs more genetic tools that facilitate to understand genetic control of traits of agronomic importance. This project was aimed to develop such tools (mapping populations for studying quantitative trait loci (QTL) for agronomic traits in rice). We developed for mapping populations, viz., Akihikari (lowland japonica) x IRAT 109 recombinant inbred lines, Nekken 2 (lowland japonica) x Gaya (lowland indica) recombinant inbred lines, Kamenoo (lowland japonica) x Dular (rainfed-lowland indica) recombinant inbred lines, and IR36 (lowland indica) x Genjah Wangkal (upland japonica) recombinant inbred lines. Many agronomic traits including germination ability have mapped using these population by researchers in Japan and China. These results were presented in the synpodium 'Why QTL information is needed in agronomy?' hold by us in the 2005 meeting of Japanese Crop Scicene Society. We also assessed the possibility to propagate and distribute these populations in cooperation with commercial company. We have successfully exchanged opinion and information with some leading companies in rice biotechnology.