title: [Genes mapping on rice allelopathy against barnyardgrass].
abstract: By using the relay seeding technique with slight modification, a population of 134 recombinant inbred lines (RILs) derived from a cross between indica rice (Oryza sativa L.) cultivar Zhong 156 x Gumei 2 and contained 168 DNA markers covering all 12 chromosomes with 1447.9 cM spans was employed to evaluate the rice allelopathic effect on barnyardgrass [Echinochloa crus-galli (I.) Beauv.]. The phenotyping values of the biomass of barnyardgrass infested with rice materials were employed to map the genes of allelopathic activity on barnyardgrass. One main effect of QTL on 7 chromosomes was identified, which explained 32.30% of the phenotypic variation. Six pairs of digenic epistatic loci were also detected, which collectively explained 47.83% of the phenotypic variation. The main QTL and epistatic loci totally explained 80.13% of the phenotypic variation of allelopathic activity.
authors.affiliation: College of Biosystem Engineering and Food Science, Zhejiang University, China National Rice Research Institute, Hangzhou, China. xzh640909@sohu.com
authors.forename: Zhenghao
authors.initials: Z
authors.lastname: Xu
authors.forename: Yong
authors.initials: Y
authors.lastname: He
authors.forename: Shaorong
authors.initials: S
authors.lastname: Cui
authors.forename: Ming
authors.initials: M
authors.lastname: Zhao
authors.forename: Xu
authors.initials: X
authors.lastname: Zhang
authors.forename: Di
authors.initials: D
authors.lastname: Li
mesh_terms: D018533:Biomass; D002874:Chromosome Mapping; D031747:Echinochloa / Q000254:growth & development*; D006540:Herbicides / Q000494:pharmacology*; D012275:Oryza / Q000235:genetics* / Q000502:physiology; D040641:Quantitative Trait Loci
chemical_list: D006540:Herbicides