Liu X, Wang Y, Wang S W
Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Ministry of Education, Tianjin, China.
Genet Mol Res. 2012 Mar 22;11(1):717-24. doi: 10.4238/2012.March.22.1.
Appearance quality of rice grains is a major problem for rice production in many areas of the world. We conducted a molecular marker-based genetic analysis of percentage of grains with chalkiness (PGWC), which is a determining factor for appearance quality; it strongly affects milling, eating and cooking quality. An F(8) recombinant inbred line population, which consists of 261 lines derived from a cross between Koshihikari (Japonica) and C602 (Japonica), was used for QTL mapping. Three QTLs related to PGWC were detected on chromosomes 5, 8 and 10, together explaining 50.8% of the genetic variation. The 'Koshihikari' alleles qJPGC-5, qJPGC-8 and the 'C602' alleles at qJPGC-10 were associated with reduced PGWC. The QTL contributions to phenotypic variance were 18.2, 9.6 and 25%, respectively. These QTL markers for PGWC could be used for developing improved varieties.
稻米外观品质是世界许多地区水稻生产面临的一个主要问题。我们对垩白粒率（PGWC）进行了基于分子标记的遗传分析，垩白粒率是外观品质的一个决定性因素，它对碾磨、食用和蒸煮品质有很大影响。一个由261个株系组成的F(8)重组自交系群体被用于QTL定位，该群体来源于越光（粳稻）和C602（粳稻）的杂交。在第5、8和10号染色体上检测到3个与PGWC相关的QTL，共解释了50.8%的遗传变异。qJPGC-5、qJPGC-8的“越光”等位基因以及qJPGC-10的“C602”等位基因与降低PGWC有关。这些QTL对表型变异的贡献率分别为18.2%、9.6%和25%。这些PGWC的QTL标记可用于培育改良品种。
