29 varieties from the Changjiang valley were classified into four groups( the Changjiang valley groups,abbreviate CVGs),including CVG1(14),CVG2(4),CVG3(5) and CVG4(6).

• 长江流域棉区的 2 9个品种被划分为 4个类群 (theChangjiangvalleygroups ,CVGs) ,即CVG1、CVG2、CVG3和CVG4 ,分别包括 14、4、5、和 6个品种。