A genetically stable method for breeding watermelon varieties with yellow leaves

Abstract

The invention discloses a chlorophyll-deficient leaf watermelon variety breeding method with genetic stability. According to the method, pollen variation is induced through X-rays, watermelons are pollinated with radiated pollen, then a recessive chlorophyll-deficient watermelon mutant is obtained, and through hybridization transformation, a novel chlorophyll-deficient watermelon variety with genetic stability is cultured. From seedling sprouting of the variety, cotyledon, leaves and peel are completely yellowed in the growth process, deep leaf incision is resulted, the leaves are small, and the plant is conspicuously different from a common watermelon variety or a yellow vein variety. The chlorophyll-deficient phenotype can be applied to coeno-species seed purity identification, the chlorophyll-deficient variety can be also planted among seedless watermelons, the workload is reduced, and the output of the seedless watermelons is increased.

Description

technical field [0001] The invention relates to the technical field of watermelon variety breeding, in particular to a genetically stable leaf yellowing watermelon variety breeding method. Background technique [0002] Watermelon is an essential summer fruit. There are some identification problems in the identification of its seed purity and the cultivation of seedless watermelon. The use of yellowish mutants can alleviate two problems: [0003] (1) At present, the identification of watermelon seed purity usually requires the planting of 200 F1 generation seeds, and the identification of purity through the fruit, which takes a long period of 3 months. Another way is to identify the purity of molecular markers, and the identification period is short. The disadvantage is that general companies lack parent-specific molecular markers, and only companies with good scientific research foundations can carry out. However, the present invention relates to etiolated seedling mutants t...

AI Technical Summary

Problems solved by technology

For centralized planting, the proportion of pollinated plants is as low as 6-10:1, which is convenient for collecting pollen without confusion, but artificial pollination can only be used; for dispersed planting, the proportion of seeded watermelon plants is higher by about 3-1. 4:1, to reduce the yield of seedless watermelons per unit area, either insect pollination or artificial pollination can be used, but because the branches and leaves of melon seedlings of any variety are similar, artificial pollination must be done for seeded watermelon seedlings to increase the amount of farming