Quantitative Genetic Study on the Traits of Leaf Angle Uppermost Ear in Maize

The six generations that from two maize inbred lines Zi330 and PH4CV were used in this study,the leaf angle uppermost ear that held naturally was measured by the protractor.F1,F2,B1,B2,P1 and P2 were used to study the inheritance of maize the leaf angle uppermost ear with joint analysis of multiple generations.The results showed that the trait presented a multi-peak distribution in the F2 population,and a two peak distribution in the B1 and B2 populations,indicating that the trait was quantitative in nature and controlled by polygene;the inheritance of maize plant traits fitted the model of a pair of additive-dominance-epitasis major gene plus additive-dominance-epitasis polygene(D Model);the major gene heritability was between 27.55%-52.60%;the polygene heritability was between 47.40%-72.45%.Both are play very important roles in genetic of generations.