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Locating QTLs controlling several adult root traits in an elite Chinese hybrid rice |
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| Authors: | Yong Shu Liang Xiao Deng ZhanHui Mming Wang Zhi Qiang GaoZe chuan Lin Dai Bo ChenXi Hong Shen Li Yong Cao Shi Hua Cheng |
| Institution: | Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, PR China; State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, PR China |
| Abstract: | This study aimed to elucidate the genetics of the adult root system in elite Chinese hybrid rice. Several adult root traits in a recombinant inbred line (RIL) population of Xieyou 9308 and two backcross F1 (BCF1) populations derived from the RILs were phenotyped under hydroponic culture at heading stage for quantitative trait locus (QTL) mapping and other statistical analysis. There a total of eight QTLs detected for the root traits. Among of them, a pleiotropic QTL was repeatedly flanked by RM180 and RM5436 on the short arm of chromosome 7 for multiple traits across RILs and its BCF1 populations, accounting for 6.88% to 25.26% of the phenotypic variances. Only additive/dominant QTLs were detected for the root traits. These results can serve as a foundation for facilitating future cloning and molecular breeding. |
| Keywords: | XQZB Xieqingzao ZH9308 Zhonghui 9308 RIL recombinant inbred line BCF1 backcross F1 XBR XQZB/RILs ZHR ZH9308/RILs RL root length TRL total root length RSA root surface area RD root diameter RV root volume RT number of root tips RDW root dry weight h2B broad-sense heritability SSR simple sequence repeat CIM composite interval mapping MIM multiple interval mapping QTL quantitative trait loci |
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