title: QTLs for rice flag leaf traits in doubled haploid populations in different environments.
abstract: Two rice doubled haploid (DH) populations derived from the crosses of ZYQ8/JX17 and CJ06/TN1 were used to detect quantitative trait loci (QTLs) for flag leaf length (FLL), width (FLW), and angle (FLA) under long-day conditions in Hangzhou (subtropical zone) and short-day conditions in Hainan (tropical zone), China. The four parents differed significantly in all 3 traits. FLL was found to be positively correlated with FLW in the 2 populations. A total of 30 QTLs were identified for flag leaf traits, with a contribution to the phenotypic variation of each QTL from 4.49 to 26.30%. Among these, qFLL-4b, qFLW-12, and qFLA-2a showed larger additive effects on the phenotype and explained more variations compared to the other QTLs. qFLL-1a and qFLL-8 were detected in both environments, while qFLL-2, qFLL-3, qFLL-10, qFLL-12, qFLW11, qFLW2, and qFLA8 were novel QTLs, which may be beneficial to rice ideal-type breeding.
authors.affiliation: State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China.
authors.forename: J
authors.initials: J
authors.lastname: Cai
authors.affiliation: State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China.
authors.forename: M
authors.initials: M
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China.
authors.forename: L B
authors.initials: LB
authors.lastname: Guo
authors.affiliation: State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China.
authors.forename: X M
authors.initials: XM
authors.lastname: Li
authors.affiliation: Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou, China jsbao@zju.edu.cn.
authors.forename: J S
authors.initials: JS
authors.lastname: Bao
authors.affiliation: State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China.
authors.forename: L Y
authors.initials: LY
authors.lastname: Ma
mesh_terms: D001947:Breeding; D002681:China; D002874:Chromosome Mapping; D003433:Crosses, Genetic; D018745:Genome, Plant; D005838:Genotype; D006238:Haploidy; D012275:Oryza / Q000033:anatomy & histology / Q000235:genetics*; D010641:Phenotype; D017440:Photoperiod; D018515:Plant Leaves / Q000033:anatomy & histology / Q000235:genetics*; D040641:Quantitative Trait Loci; D014329:Tropical Climate