凉山州玉米品种发展演变与种质创新

通过对凉山州解放以来玉米生产情况、主要品种种质以及杂种利用模式的分析，认为凉山州主要玉米种质源于我国4大种质类群及部分综合种选亚群；主要杂种优势利用模式有7种。凉山州大面积应用的玉米品种遗传基础比较狭窄，但本地玉米种质资源丰富，可利用价值高。因此，需要加大本地区玉米种质资源的搜集、整理、扩增、改良和创新工作。

On Variety Evolution and Renovation of Corns in Liangshan Prefecture

After analyzing corn production,quality of its major varieties and utilizing mode of its hybrids in Liangshan ever since liberation,we have found that the major varieties here originated from the four categories and some sub categories in China,and there are seven utilizing modes of hybrids.Although there is a narrow heritable base for widely grown corn varieties in local areas,the local variety resources are abundant and highly exploitable.Therefore,more work needs to be done to collect,expand and renovate...