RICE SCIENCE

• Research Paper • Previous Articles     Next Articles

Mapping Quantitative Trait Loci for Palatability of Milled Rice

TANG Shao-qing1, HU Pei-song1, JIAO Gui-ai1, ZHAI Hu-qu2, WAN Jian-min2, 3
  

  1. 1 State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China; 2 Chinese Academy of Agricultural Sciences, Beijing 100081, China; 3 State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210015, China
  • Received:2004-06-02 Revised:1900-01-01 Online:2005-03-28 Published:2005-03-28
  • Contact: WAN Jian-min

Abstract:

Quantitative trait loci (QTLs) controlling palatability in rice were identified using a set of 98 backcross inbred lines (BILs) population derived from a cross between a japonica variety Nipponbare and an indica variety Kasalath. The palatability scores of the population measured by RQ1/Plus Rice Analyzer, showed a continuous and transgressive segregative distribution with a range from 66 to 92. Four putative QTLs for palatability, qPAL-5, qPAL-7, qPAL-8a and qPAL-8b, were detected on chromosome 5, 7 and 8, and they accounted 7.83, 7.03, 11.58 and 7.19% of the total phenotypic variation, respectively. Three alleles qPAL-5, qPAL-7 and qPAL-8b from Kasalath increased the palatability score, whereas only one Nipponbare allele qPAL-8a increased the score . Eight transgressive lines in palatability were selected to make a comparison between phenotypic and genotypic classes. The result explained the possibility of positive QTLs pyramiding through marker-assisted selection of highly palatable rice.

Key words: rice (Oryza sativa), palatability, quantitative trait loci