Cultivation method of chromosomal-translocation triploid seedless watermelons

Abstract

The invention discloses a cultivation method of chromosomal-translocation triploid seedless watermelons. The cultivation method comprises the following steps of: (a) breeding of a male parent, namely crossing a chromosomal-translocation diploid watermelon breeding material with a diploid material suitable for serving as a seedless watermelon male parent, thus obtaining the male parent in a breeding method for four-generation continuous backcross, one-generation self cross and one-generation test cross; (b) breeding of a female parent, wherein mutating a diploid watermelon breeding material suitable for being mutated into tetraploid watermelons into tetraploid watermelons by a colchicine solution with the mass concentration of 0.2%, thus obtaining the female parent by self-crossing fertile restoration for 3-4 generations; and (c) performing cross matching on the female parent and the male parent to obtain the chromosomal-translocation triploid seedless watermelon variety through variety tests. The cultivation method disclosed by the invention has the advantages that chromosomal translocation and 3X double abortion are superposed, so that the breeding difficulty of more colored and abortive grains of 3X seedless watermelons is effectively overcome; and when the chromosomal-translocation triploid seedless watermelons are planted in protected areas and areas with large temperature difference at day and night, the colored and abortive grains do not occur, so that the planting range is expanded.

Description

technical field [0001] The invention belongs to plant breeding, in particular to a method for cultivating seedless watermelons. Background technique [0002] At present, there are two methods for cultivating seedless watermelon. The first method is to use 4X as the female parent and common 2X watermelon as the male parent to crossbreed and cultivate 3X seedless watermelon varieties, which are widely used in production at present. However, because 3X seedless watermelon tends to appear colored seeds when the temperature difference between day and night is large, it directly affects the commerciality of seedless watermelon and restricts the development of the seedless watermelon industry, especially in watermelon eugenics areas (regions with large temperature difference between day and night) ) can not grow seedless watermelons, which is also a breeding problem that is difficult to overcome in current triploid watermelon breeding; the second method is to utilize hormones to cu...

AI Technical Summary

Problems solved by technology

However, because 3X seedless watermelon tends to appear colored seeds when the temperature difference between day and night is large, it directly affects the commerciality of seedless watermelon and restricts the development of the seedless watermelon industry, especially in watermelon eugenics areas (regions with large temperature difference between day and night) ) cannot grow seedless watermelons, which is also a breeding problem that is difficult to overcome in current triploid watermelon breeding; the second method is to utilize hormones to cultivate seedless watermelons.

This method is cumbersome to deal with female flowers, and the resulting seedless watermelon has a very high rate of colored seeds and has no commercial value. At present, it has not been used in watermelon production in various countries.

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