title: Locating QTLs controlling several adult root traits in an elite Chinese hybrid rice.
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.
authors.affiliation: Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, PR China.
authors.forename: Yong Shu
authors.initials: YS
authors.lastname: Liang
authors.forename: Xiao Deng
authors.initials: XD
authors.lastname: Zhan
authors.forename: Hui Mming
authors.initials: HM
authors.lastname: Wang
authors.forename: Zhi Qiang
authors.initials: ZQ
authors.lastname: Gao
authors.forename: Ze chuan
authors.initials: Zc
authors.lastname: Lin
authors.forename: Dai Bo
authors.initials: DB
authors.lastname: Chen
authors.forename: Xi Hong
authors.initials: XH
authors.lastname: Shen
authors.forename: Li Yong
authors.initials: LY
authors.lastname: Cao
authors.forename: Shi Hua
authors.initials: SH
authors.lastname: Cheng
mesh_terms: D032461:Chromosomes, Plant; D056726:Genetic Association Studies; D008040:Genetic Linkage; D012275:Oryza / Q000235:genetics*; D010641:Phenotype; D020161:Physical Chromosome Mapping; D018517:Plant Roots / Q000235:genetics*; D040641:Quantitative Trait Loci; D019655:Quantitative Trait, Heritable
keywords: BCF(1); CIM; MIM; Molecular mapping; Oryza sativa L.; QTL; Quantitative trait locus; RD; RDW; RIL; RIL and BCF(1) populations; RL; RSA; RT; RV; Root; SSR; TRL; XBR; XQZB; XQZB/RILs; Xieqingzao; ZH9308; ZH9308/RILs; ZHR; Zhonghui 9308; backcross F(1); broad-sense heritability; composite interval mapping; h(2)(B); multiple interval mapping; number of root tips; quantitative trait loci; recombinant inbred line; root diameter; root dry weight; root length; root surface area; root volume; simple sequence repeat; total root length