Hori Kiyosumi, Yamamoto Toshio, Yano Masahiro
Institute of Crop Science, National Agriculture and Food Research Organization (NARO), 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518, Japan.
Breed Sci. 2017 Dec;67(5):427-434. doi: 10.1270/jsbbs.17053. Epub 2017 Nov 15.
Many quantitative trait loci (QTLs) for agronomically important traits such as grain yield, disease resistance, and stress tolerance of rice ( L.) have been detected by using segregating populations derived from crosses between and subspecies or with wild relatives. However, the QTLs involved in the control of natural variation in agronomic traits among closely related cultivars are still unclear. Decoding the whole genome sequences of Nipponbare and other temperate rice cultivars has accelerated the collection of a huge number of single nucleotide polymorphisms (SNPs). These SNPs are good resource for developing polymorphic DNA markers and for detecting QTLs distributed across all rice chromosomes. The temperate rice cultivar Koshihikari has remained the top cultivar for about 40 years since 1979 in Japan. Unraveling the genetic factors in Koshihikari will provide important insights into improving agronomic traits in temperate rice cultivars. Here we describe recent progress in our studies as an example of genetic analysis in closely related cultivars.
利用粳稻和籼稻亚种间杂交或与野生近缘种杂交产生的分离群体，已检测到许多控制水稻（Oryza sativa L.）重要农艺性状（如产量、抗病性和抗逆性）的数量性状位点（QTL）。然而，控制近缘品种间农艺性状自然变异的QTL仍不清楚。日本晴和其他温带粳稻品种全基因组序列的解码加速了大量单核苷酸多态性（SNP）的收集。这些SNP是开发多态性DNA标记和检测分布于水稻所有染色体上的QTL的良好资源。自1979年以来，温带粳稻品种越光在日本约40年一直是顶级品种。解析越光中的遗传因素将为改良温带粳稻品种的农艺性状提供重要见解。在此，我们以近缘品种的遗传分析为例，描述我们研究的最新进展。
