Mixed major genes+polygene genetic model analysis for early-maturity related traits in Luffa acutangula
[Objective]The purpose of the study was to provide theoretical reference for the breeding of early maturing Luffa acutangula varieties through the analysis of major genes+polygene genetic model for early-maturity related traits.[Method]A six-generation genetic population was constructed using the high-generation inbred lines LC034(♀)and LC052(♂)of L.acutangula as parents,four early-maturity related traits of L.acutangula(the first female flower node,the first blooming date,the first fruit setting node and the first harvest date)were carried out by using major genes+polygene inheritance segregation analysis.[Result]The four early-maturity related traits of LC034 were extremely significantly lower than those of LC052(P<0.01).The coefficients of variation for the four early-maturity related traits in the F1,BC1P1,BC1P2,and F2 populations were 8.70%-25.46%,14.77%-37.67%,19.93%-38.97%,and 22.37%-46.81%.More-over,the separation frequency distribution of the four early-maturity related traits in the F2 population contained the mixed distribution of multiple normal distributions.The optimal genetic model of the first female flower node and the first fruit setting node was the MX2-ADI-ADI model,which was controlled by 2 pairs of additive-dominant-epistatic major genes+additive-dominant-epistatic polygenes.The major gene heritability(h2mg)of the first female flower node in BC1P1,BC1P2,and F2 generations was 4.63%,84.69%and 79.99%,respectively,while the polygenic heritability(h2pg)was 74.60%,0 and 0.The h2mg of the first fruit setting node in BC1P1,BC1P2,and F2 generations was 2.38%,82.86%and 76.45%,respectively,while the h2pg was 57.04%,0 and 0.The optimal genetic model of the first blooming date was 2MG-ADI,which was controlled by 2 pairs of additive-dominant-epistatic major genes.The h2mg of BC1P1,BC1P2,and F2 genera-tions was 72.02%,79.05%,86.53%respectively.The optimal genetic model of the first harvest date was 2MG-AD,which was controlled by 2 pairs of additive-dominant major genes.The h2mg of the first harvest date in BC1P1,BC1P2,and F2 gen-erations was 62.33%,84.79%and 85.07%respectively.[Conclusion]The the first female flower node,the first blooming date,the first fruit setting node and the first harvest date of L.acutangula are all characterized by quantitative traits and are controlled by polygenes,among which the first female flower node and the first fruit setting node are controlled by 2 pairs of additive-dominant-epistatic major genes+additive-dominant-epistatic polygenes,the first blooming date is controlled by 2 pairs of additive-dominant-epistatic major genes,the first harvest date is controlled by 2 pairs of additive-dominant ma-jor genes.
Luffa acutangulaearly-maturity related traitsmajor genes+polygene genetic modelsix-generation population
国家科技期刊平台
NSTL
万方数据
维普
