Identification and evaluation of Cucurbita moschata germplasm resources
In order to better develop and utilize Cucurbita moschata germplasm resources,a two-year field planting identification on 248 Cucurbita moschata germplasm resources including 117 newly collected Cucurbita moschata local germplasm resources from the Zhejiang Project Group of the"Third National Census and Collection of Crop Germplasm Resources"was carried out.The agronomic traits,quality traits and disease resistance traits were investigated,analyzed and evaluated.The results showed that the Cucurbita moschata planting resources studied had rich diversity.The variation range of 13 agronomic traits was 12.30%-66.45%,among which the leaf width and leaf length had the lowest variation coefficients,which were 12.30% and 13.22%,respectively.The longitudinal diameter of commercial melon and the single weight of old melon had the highest variation coefficients,which were 66.45% and 53.70%,respectively.The variation range of 7 quality traits was 3.62%-81.82%,among which the minimum variation coefficient of water content was 3.62%,and the maximum variation coefficient of starch content was 81.82% .The powdery mildew index and virus disease index had the variation coefficients of 27.79% and 28.03%,respectively.Correlation analysis showed that the single weight of old melon was correlated with leaf width,first female flower node,main stem diameter,commercial melon thickness,commercial melon transverse diameter and water content to varying degrees.The water content was negatively correlated with soluble solids content,and the correlation coefficient was-0.919.The pectin content was significantly correlated with soluble sugar content,and the correlation coefficient was 0.801.Principal component analysis classified 22 traits into 7 principal components,with a cumulative contribution rate of 63.997% .The results of this study provide a theoretical basis for better development and utilization of Cucurbita moschata germplasm resources.
万方数据
维普
