Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (30): 14-20.doi: 10.11924/j.issn.1000-6850.casb2021-1155

Special Issue: 生物技术 玉米

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Quality Traits of Sweet Corn: Major Gene +Polygene Genetic Analysis

JIANG Feng1,2(), YAN Yan1, MAI Jiaqi1, LIANG Rilang1, ZHOU Jiecheng1, LI Pingyao1, LIU Pengfei1,2()   

  1. 1College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225
    2Guangzhou Key Laboratory for Research and Development of Crop Germplasm Resources, Guangzhou 510225
  • Received:2021-12-01 Revised:2022-03-28 Online:2022-10-25 Published:2022-10-27
  • Contact: LIU Pengfei E-mail:breakthrough@139.com;774990480@qq.com

Abstract:

The major gene + polygene genetic analysis of quality traits in sweet corn was carried out to provide a theoretical basis for quality improvement of sweet corn. In this experiment, the hybrid combination T77 (high-value parent) ×T15 (low-value parent) was prepared from sweet corn inbred lines with significantly different fructose content, dietary fiber content and vitamin C content. Three quality traits, namely fructose content, dietary fiber content and vitamin C content, were measured in the F2 generation population of this combination. The optimal genetic model and related genetic parameters of the three traits were analyzed by using the major gene + polygene genetic model. The experiment showed that the optimal genetic model for fructose content was A-1, which was a mixed one additive-dominant major gene genetic model, and the heritability of major gene was 76.4%. The optimal models for dietary fiber content and vitamin C content were both B-1, which indicated that these two traits conformed to the genetic model of two additive-dominant-epistatic major genes, and the heritability of major genes was 63.6% and 64.7%, respectively. In breeding practice, the genetic improvement and selection of fructose content, dietary fiber content and vitamin C content of sweet corn could be carried out in the early generation, and at the same time, certain environmental factors should be highlighted, and the method of polymerization backcross or recurrent selection should be adopted to accumulate minor genes to improve breeding efficiency.

Key words: sweet corn, quality traits, major gene + polygene, genetic analysis, genetic model

CLC Number: