杂交玉米品种DUS必测性状的表现与优化.

Objective】 To optimize asterisked characteristics and provide references for maize DUS testing guidelines revision. [Method] All of 45 maize hybrids were tested to analyze the diversity and correlations of 38 asterisked characteristics in this study.【Result】 One hundred and seventy-eight allelic variations were detected in 38 asterisked characteristics with an average of 4.6842 for each characteristics，and the variation range was from 1 to 8； the average effective allelic variation was 2.7830 with variation range from 1.0539 to 5.9121； the average Shannon-Weaver diversity information index was 1.2593,and the variation range was from 0.4236 to 1.9982. Similarity coefficient ranged was from 0.31 to 0. 68 for 45 maize hybrids, and the 9 pairs characteristics showed significant positive (correlations in 38 asterisked characteristics.【Conclusion】 It was suggested that 8 characteristics that C3，C4，C:13，Cl7, Cl9, C:26，C27，C30 need not to be examined as asterisked, and the other 30 characteristics should always be examined in maize DUS testing guidelines. [ABSTRACT FROM AUTHOR]