玉米子粒淀粉含量的配合力效应分析

Analysis of Combining Ability of Kernel Starch Concentration in Maize

以15个自选系为母本,5个选自不同杂优类群的测验系为父本,按照NCⅡ设计配成75个杂交组合,在河南3个地点采用裂区试验,利用MARX-Ⅰ型近红外品质分析仪测定子粒淀粉含量,分析了基因型、地点及其互作对组合子粒淀粉含量的影响,进行了配合力效应分析.结果表明,地点与基因型各自之间差异均达极显著水平,而地点×基因型的互作效应差异不显著;双亲各自淀粉含量的一般配合力(GCA)效应差异均达极显著水平,组合的淀粉含量以GCA效应为主;母本自选系中,M5的淀粉含量GCA效应最高,M10和M1次之,父本以昌7-2的GCA效应最高,可作为高淀粉育种的重要资源加以利用.

Seventy five crosses were composed according to NC Ⅱ design using 15 inbreeds as female and five inbreeds as male parents with variance starch concentration selected from different groups, and trailed under split block design at three locations in Henan, the kernel starch concentration was tested by using MARX-Ⅰ type NIRS, and the effects of genotypes, locations and their interactions as well as combining ability were evaluated on corn starch. The results showed that highly significant differences had been found in different locations and genotypes but not in the location × genotype interactions, respectively; highly significant differences in starch content of GCA effects existed among male and female parents, respectively. The GCA effect was main on starch content; among female parents, the inbred line M 5 with the highest GCA effect on starch content followed by M 10 and M 1, while among male parents, Chang 7-2 with the highest GCA effect, these lines can be used as important resource in high starch breeding.