Abstract:

The aim was to enhance the selection efficiency of major agronomic traits for cucumber breeds (strains) and to provide theoretical basis for the screening, renewal and high-yield cultivation of cucumber breeds. 10 cucumber quality varieties are adopted to conduct variation, correlation and principal component analyses on the major agronomic traits. The trait of nodes appearing in the first female flower represents the maximum variation coefficient of cucumbers which is 63.53%, and those with long internode distance have the minimum variation coefficient which is 4.45%. The seven traits, namely, the single melon weight, the number of yielded melons, the number of female flowers, the number of female flowers with nodes, melon-yielding rate, the length of fruits and the size of fruits are of positive correlation with the single plant yield, in which the single melon weight and the number of yielded melons are of extremely positive correlation with the single plant yield, while the height of plant, the internode distance and the nodes appearing in the first female flower are of negative correlation with correlate the single plant yield. From the principal component analysis, the accumulation contribution of the first 4 principal components is up to 93.8724%. A theoretical base for seed selection of self-bred line cucumber, cross set-making and match of high-yield quality variety is provided.