Genetic analysis for downy mildew resistance in cucumber
DING Huanhuan
LI Xiaohui
HU Keyun
WEI Pengfei
Abstract：Six generation of P1,P2,F1,B1,B2,F2 derived from a crossing between parent ‘ILl12’,a susceptible to downy mildew (DM),and parent‘ HNAU0023 ’,a high resistant to DM,were used for genetic analysis of downy mildew resistance(DMR) in cucumber by SEA-G 6.The results showed that the best model was "E-0 model","two pair of additive-dominant-epistasis major gene+ additive-dominance-epistasis interaction polygene".The additive effects of two major genes were 13.05;dominance effect of the major gene were-30.34,-15.88.Heritability of the major gene in B1,B2,F2 population was 68.63％,76.36％,87.15％;Heritability of the polygene was 0,7.25％,0.Heritability of the major gene was higher than the polygene,obviously.Therefore,in the breeding of resistance to cucumber downy mildew,major gene should be high priority.
Keywords：CucumberDowny mildewSegregation analysisGenetic analysis
Publication Date：2017-05-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 7-10,46 )