Genetic Analysis of Leaf Stalk-stem Angle Using Mixture Model of Major Gene Plus Polygene in Cucumis melo L.

doi:10.11924/j.issn.1000-6850.casb16080043

Abstract

Abstract: Leaf stalk-stem angle is one of important plant architecture traits in melon (Cucumis melo L.). In this study, the genetic characteristic of leaf stalk-stem angle was analyzed to provide theoretical basis for plant type breeding of melon. The varieties B103 (with small leaf stalk-stem angle) and B297 (with big leaf stalk-stem angle) were used as parent lines and the four generation group (P₁, P₂, F₁ and F₂) was then constructed. The mixed major gene plus polygene inheritance model was used to analyze the inheritance of leaf stalk-stem angle. The results of two years showed that the leaf stalk-stem angle of melon was a quantitative trait and its inheritance was controlled by a mixed genetic model of two major genes with additive-dominant-epistatic effects plus polygenes with additive-dominant effects (the E-1 model). The heritability of major genes and polygenes for leaf stalk-stem angle were estimated to be 72.28% and 0 respectively in autumn of 2015 and 52.06% and 0 respectively in spring of 2016. The results indicated that the inheritance of the leaf stalk-stem angle in melon accorded with a genetic model of two major genes with additive, dominant and epistatic effects plus polygenes with additive, dominant effects (the E-1 model). This trait was controlled by major genes and was also affected by environment.

CLC Number:

S651

Xiong Jiangling,Zhao Guangwei,Xu Zhihong,He Yuhua,Kong Weihu,Zhang Jian and Xu Yongyang. Genetic Analysis of Leaf Stalk-stem Angle Using Mixture Model of Major Gene Plus Polygene in Cucumis melo L.[J]. Chinese Agricultural Science Bulletin, 2016, 32(34): 55-61.

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