Heading date is a key factor determining the regional and seasonal adaptation of rice. It has been frequently observed that QTLs for heading date could exert pleiotropism on yield traits and plant height. However, the pleiotropism of QTLs for heading date other than Ghd7 and DTH8(Ghd8) remains to be validated. Two BC2F5 populations segregated in the regions harboring heading date gene RFT1Hd3a and Hd1 in an isogenic genetic background were constructed using Zhenshan 97B as the recurrent parent and Milyang 46 as the donor parent. QTLs for heading date, plant height and thousandgrain weight were detected using Windows QTL Cartographer 2.5. In addition, four homozygous combinations of RFT1Hd3a and Hd1 were classified based on the genotypes of Si2944 tightly linked to RFT1Hd3a and the Hd1 gene marker Si9337, and the phenotypic differences among the four groups were analyzed. QTLs were detected for each of the three traits analyzed in both regions, which did not interact with each other. It was also shown that the effects of the Hd1 region were always larger than that of the RFT1Hd3a region.
CHEN Junyu, WANG Kai, GONG Junyi, FAN Yeyang, HUANG Derun, ZHUANG Jieyun*
. Effects of the RFT1 Region and Hd1 Region on Heading Date, Plant Height and Thousandgrain Weight in Rice (Oryza sativa)[J]. Chinese Journal OF Rice Science, 2013
, 27(2)
: 117
-121
.
DOI: 10.3969/j.issn.10017216.2013.02.002
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