Phenotypic diversity of ear traits in 487 maize landraces
To investigate the interrelationship between ear traits in maize germplasm resources and identify high-qual-ity maize germplasm resources,487 maize germplasm resources collected from four provinces including Guizhou,Shaanxi,Gansu and Hubei were used as study materials,and comprehensive evaluation of 10 ear traits were conduc-ted using methods such as Shannon-Wiener diversity index,principal component analysis,and cluster analysis.The results showed that the coefficient of variation of the10 ear traits ranged from6.1%to71.0%,andthe phenotypic diversity indices ranged from 0.319 to 2.038.Correlation analysis revealed widespread correlation between traits.Systematic cluster analysis divided the 487 germplasm resources into four groups:GroupⅠincluded 187 germplasm resources,GroupⅡ included 208 germplasm resources,GroupⅢ included 48 germplasm resources,and GroupⅣincluded 44 germplasm resources,with Guizhou and Shaanxi germplasm resources being more representative.In the end,15 germplasm resources with excellent comprehensive performance in ear traits were selected,which could pro-vide reference and basic materials for maize resource identification,germplasm material innovation,and genetic breeding.
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