[Genes mapping on rice allelopathy against barnyardgrass].
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.
Xu
Zhenghao
Z
College of Biosystem Engineering and Food Science, Zhejiang University, China National Rice Research Institute, Hangzhou, China. xzh640909@sohu.com
He
Yong
Y
Cui
Shaorong
S
Zhao
Ming
M
Zhang
Xu
X
Li
Di
D
D018533:Biomass; D002874:Chromosome Mapping; D031747:Echinochloa / Q000254:growth & development*; D006540:Herbicides / Q000494:pharmacology*; D012275:Oryza / Q000235:genetics* / Q000502:physiology; D040641:Quantitative Trait Loci
D006540:Herbicides