Morphological Diversity Analysis of Red-seed Edible Seed Watermelon Germplasm Resources

Shape multiple cluster analysis and principal components analysis were carried out up to 51 red-seed edible seed watermelon(Citrullus lanatus ssp. vulgaris var. megalaspermus Lin et Chao.) germplasm resources. The results indicated that the red-seed watermelon idioplasm resources 39 shape character coefficient of variation is 5.37 %-66.95 %, the average coefficient of variation is 22.87 %. The average Shannon multiple information indices are 1.55, the seed length Shannon multiple information indices are the highest 2.16. The seed shell duplicate grain is the lowest 0.32. The quantity character shape multiple information indices are bigger than the quality character. Through the principal components analysis, the first principal components variance technical progress factor is 19.49 %, the second principal components variance technical progress factor is 15.32 %. The third principal components variance technical progress factor is 9.55 %. Gathers based on the shape character's cluster analysis, 51 materials are divided into 3 broad headings. The first kind has only 1 material, the second kind has 2 material. The first 2 kinds are all wild species materials. The 48 material of the 3rd kind are cultivated material.