Genes mapping on rice allelopathy against barnyardgrass

Abstract

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? Gumei 2 and contained 168 DNA markers covering all 12 chromosomes with 1447.9 cMspans was employed to evaluate the rice allelopathic effect on barnyardgrass [Echinochloa crus galli (l.) 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.

CLC Number:

Q948

XU Zhenghao, HE Yong, CUI Shaorong, ZHAO Ming, ZHANG Xu, LI Di. Genes mapping on rice allelopathy against barnyardgrass[J]. Chinese Journal of Applied Ecology, 2003, (12): 2258-2260.

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