The Mixed Major Gene Plus Polygene Inheritance Analysis For The Main Traits Of Sweet Corn

In this paper, the two sweet corn combinations(Cross I A14×24050、Cross II S10×24210) were carried out multi generation joint analysis which utilized the mixed major gene plus polygene inheritance model of quantitative traits in plants. The test mainly observed and studied two sweet corn combinations of the twelve traits in six generation, P1、P2、F1、B1、B2、F2,the results showed that:1. Genetic analysis of plant type traits resultsIn combination I, the plant height traits conformed to E-0 model, that was the two pairs of the additive-dominant-epistatic major genes plus additive-dominant-epistatic polygene model. Combination II accorded with the B-1 model, namely two pairs of additive-dominant-epistatic major genes model. At the same time, between two major genes existed interaction effects and the trait was influenced by certain environmental factors. In the two combinations, the major gene plus polygene heritability all were highest in the B2 generation.Inheritance of ear height trait all consisted with E-1 model in two combinations, that was the two pairs of the additive-dominant-epistatic major genes plus additive-dominant polygene model. In the two combinations, the major gene plus polygene heritability all were highest in the B2 generation.Stem diameter trait of combination I followed E-1 model, that was the two pairs of the additive-dominant-epistatic major genes plus additive-dominant polygene model;Combination II accords with the E-0 model, namely two pairs of additive-dominant-epistatic major genes plus additive-dominant-epistatic polygene model. Between the major genes of this two combinations existed obviously interaction effects. The major gene plus polygene heritability all were highest in the B1 generation of two combinations.2. Genetic analysis of panicle traits resultsIn combination I, the inheritance of ear length trait followed D-0 model, which has a pair of additive-dominant major gene plus additive-dominant-epistatic polygene model. In combination II, it followed C-0 model, namely additive-dominant-epistatic polygene model.In combination I, the inheritance of ear diameter trait tallied with E-0 model, that was the two pairs of the additive-dominant-epistatic major genes plus additive-dominant-epistatic polygene model. And the combination II tallied with E-4 model, that was the two pairs of the equal additive major genes plus additive-dominant polygene model.In combination I, the inheritance of ear row number trait conformed to B-2 model,which has two pair of additive-dominant major genes model. Combination II conformed to D-1 model, which has a pair of additive-dominant major gene plus additive-dominant polygene model. The overall rate of genetic for the two combination gene is not high, therefore it easily affected by the environment.Kernels per row trait in combination I accorded with B-1 model, namely two pairs of additive-dominant-epistatic major genes model. In combination II, the kernels per row trait accorded with A-1 model, which has a pair of additive-dominant major gene model. In the two combinations, the major gene plus polygene heritability all were highest in the B2 generation.Inheritance of panicle weight trait all conformed to E-1 model in two combinations, that was the two pairs of the additive-dominant-epistatic major genes plus additive-dominant polygene model. The overall rates of genetic for two combinations all were highest in the F2 generation.In combination II, the hundred-grain weight trait followed D-4 model, which has a pair of negative completely dominant major gene plus additive-dominant polygene model. The overall rate of this combination gene is not high, therefore it easily affected by the environment and not suitable for early generation selection.Two combinations of bald tip length trait and combination I of hundred-grain weight trait cannot determine compliance with the model, therefore unable to determine its genetic effect.3. Genetic analysis of quality traits resultsInheritance of soluble sugar content trait all followed E-1 model in two combinations, that was the two pairs of the additive-dominant-epistatic major genes plus additive-dominant polygene model. The main gene was mainly dominant effect, and there is interaction between genes.Combination I of protein content trait cannot determine compliance with the model in this experiment, therefore unable to determine its genetic effect. In combination II, the protein content trait accorded with B-1 model, namely two pairs of additive-dominant-epistatic major genes model. The genetic rate was highest in the B1 generation.