1>Xinxiang Academy of Agricultural Sciences, Xinxiang, Henan 453000, China
Department of Plant Genetics and Breeding, Collage of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
State Key Laboratory of Plant Physiology and Biochemistry, Beijing 100193, China
National Centre for Evaluation of Agricultural Wild Plant (Rice), Beijing 100193, China
Beijing Key Laboratory of Crop Genetic Improvement and Genome of Ministry of Agriculture, Beijing 100193, China
*Corresponding author's E-mail: caihw@cau.edu.cn
Online published on 11 December, 2012.
An F8 recombinant inbred lines (RIL) population was used to identify quantitative trait loci (QTLs) for potassium chlorate (KClO3) resistance and low temperature tolerance (LTT), two key physiological traits to distinguish rice subspecies, indica and japonica. Four traits were measured for KClO3 resistance including shoot length, root length, shoot length and root length ratios of treatment and control conditions, and four traits for LTT including shoot length, root length and germination rate in 15° and 28°. A total of six QTLs were identified on chromosomes 2, 4, 7 and 10 for KClO3, including a major QTL qSLratio-2, which accounted for 40% of the phenotypic variance. On the other hand, a total of four QTLs for LTT were identified on chromosomes 2 and 4. These results will be useful in marker-assisted selections for these two important traits.
Genome region, low temperature tolerance, potassium chlorate resistance, quantitative trait locus, rice
