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首页> 外文会议>International symposium on hybrid rice >Research on the development of CMSD1-based japonica hybrid rice with high yield potential for the Yun-Gui Plateau
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Research on the development of CMSD1-based japonica hybrid rice with high yield potential for the Yun-Gui Plateau

机译：Yun-GUI高原高产潜力发展CMSD1粳稻杂交水稻的研究

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Japonica rice is grown widely in fields with altitudes from about 1,400 to 2,700 meters in the Yun-Gui Plateau in southwestern China, where climatic conditions are unfavorable for the growth of landrace rice varieties. To improve hybrid vigor for rice grain production, research based on cytoplasmic male sterility(CMS) of Dian type 1 (D1) has been carried out in the following areas in recent years. (1) The development of japonica CMS lines with high and stable sterility under various temperature conditions. (2) Genetic characterization and molecular genotyping of fertility revertants discovered in CMS-D1 populations.(3) Identification of major Rf loci in various CMS systems with DNA markers,in which restorers of several CMS systems showed the same genotype at the Rf-1 locus. (4) Screening of new Rf sources in landraces with the DNA markers located within the Rf-1 locus. (5) Enriching of genetic diversity of restorers and maintainers of the CMS-D1 system through development of indica-japonica lines, which possess characteristics of indica or wild rice and the genetic background of japonica cultivars. (6) The development of japonica hybrid varieties possessing high yield potential, in which two hybrid varieties released possess disease resistance, good grain quality, and yield potential above 12.75 t ha–1 averaged on a 6.67-hectare field.
机译：粳稻在从约1400 2700米的云贵高原西南部中国，气候条件不利的地方品种水稻品种的生长海拔领域广泛种植。为了提高水稻粮食生产杂种优势，研究基于滇1型（D1）已在以下领域在近几年开展的细胞质雄性不育（CMS）。 （1）的粳稻不育系与各种温度条件下高且稳定的不育的发展。 （2）遗传表征和在CMS-D1种群发现生育回复体分子的基因分型;（3）在用DNA标记各种CMS系统，其中几个CMS系统的恢复系表明在RF-1相同的基因型主要RF基因座的鉴定轨迹。 （4）与位于RF-1基因座中的DNA标记地方品种的新的RF源的筛选。 （5）通过的籼粳线，其具有籼稻或野生稻和粳稻的遗传背景的特性发展恢复系和CMS-D1系统维护者的遗传多样性的富集。 （6）的粳稻杂交品种具有高产量潜力，其中发布了两个杂交品种具有以上12.75抗病性，良好的粒质量和产量潜力吨公顷-1上的6.67公顷的场均发展。

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