甜玉米自交系农艺性状配合力的综合分析

Comprehensive Analysis of Combining Ability of Agronomic Traits in Sweet Corn Inbred Lines

【目的】研究甜玉米自交系农艺性状配合力,为培育优良杂交种奠定基础。【方法】以13个甜玉米自交系为试验材料,采用Griffing完全双列杂交方法调查单株产量、果皮厚度、可溶性总糖、株高、穗位高、穗长、穗粗、行粒数、穗行数、秃尖、百粒重等11个性状的配合力和群体遗传参数。【结果】根据单株产量、果皮厚度与可溶性总糖的配合力测定值鉴定出自交系B6为高产-优质型自交系,B10、B11为高产自交系,B13为优质型自交系;并且依据配合力效应值对13个自交系进行杂种优势群划分。【结论】通过对13个自交系的农艺性状配合力效应情况作出科学评价,探索了各性状的遗传规律、相互关系以及杂种优势群的划分,为今后合理利用甜玉米自交系配制杂交组合与自交系筛选提供了理论指导。

【Objective】The combining abilities of agronomic traits in super sweet corn inbred lines was investigated to provide a foundation for the breeding of excellent hybrids.【Method】The combining abilities and population genetic parameters of yield per plant,pericarp thickness,soluble sugar content,plant height,ear height,ear length,ear thickness,kernel number per row,rows per ear,barren ear tip,and 100-seed weight were investigated in 13 sweet maize inbred lines by using the complete diallel cross of Griffing method.【Result】According to the measurement values of yield per plant,pericarp thickness,and soluble sugar content,B6 was identified as high yield-excellent inbred line,B10 and B11 as highyield inbred line,and B13 as excellent inbred line.And 13 inbred lines were divided into multiple heterotic groups based on the combining ability effect values(CAEVs).【Conclusion】According to the scientific evaluation on the CAEVs of agronomic traits in 13 inbred lines,the inheritance law and correlation of different agronomic traits and the division of heterotic groups were explored,which will provide theoretical guidance for hybridization preparation and inbred lines screening by the reasonable utilization of sweet corn inbred lines in the future.