Method for cultivating cauliflower hybrid by using male sterile line

Abstract

A method for cultivating a cauliflower hybrid by using a male sterile line comprises the following steps: transferring male sterile lines to obtain sterile lines and cauliflower male sterile lines with the sterility degree of 100%; screening out various male sterile lines with different target properties, and matching the male sterile lines as a female parent with a corresponding self-variable line male parent according to a complementation principle to prepare a hybrid combination; and carrying out field identification flying variety comparison test and production test to obtain the new hybrid with target properties. The method has the following advantages: 1, the hybrid rate can reach 100%; 2, continuous selfing is not needed, so decline of the vitality of parent plants is avoided; 3, the field seed production is simple, the manpower is reduced, the production cost is reduced, and promotion is easy; and 4, the cultivated male sterile line is not plagiarized in the seed production process, so the intellectual property rights of a seed producer are protected to a certain degree.

Description

technical field [0001] The invention belongs to a vegetable breeding method, in particular to a method for cultivating cauliflower hybrids by using male sterile lines. Background technique [0002] At present, there are two methods of breeding on cauliflower: 1. Conventional group selection method: this method is to plant farm species in a large area, select excellent individual plants according to different characteristics, and select excellent single plants with similar shapes. The plants are merged together for mixed seed collection and then planted. After 4-5 generations in this way, a better conventional variety was obtained for production. The advantage of this breeding method is: the method is simple, and the time used for cultivating the selected varieties is relatively short. The disadvantages are: First, the variety uniformity is poor. The second is that isolation measures are required to prevent crossbreeding between groups; the third is that intellectual prope...

AI Technical Summary

Problems solved by technology

The disadvantages are: First, the variety uniformity is poor

Second, isolation measures are required to prevent crossbreeding between groups; third, intellectual property rights cannot be self-protected; varieties can be reproduced, produced and sold by anyone, and breeders are not rewarded

4. The varieties bred by this method have low yield, poor disease resistance and easy degeneration of species. At present, only a very small number of special varieties adopt this breeding technology

The first disadvantage is that incompatibility is not completely incompatibility, so the hybridization rate cannot reach 100%, and the results and intellectual property rights cannot be effectively protected; the second is that not only traits but also compatibility must be considered when selecting parents. The difficulty of breeding increases, and the pollination at the bud stage requires a lot of labor, the parents are difficult to reproduce, and the cost is high

At the same time, the cost of producing the first generation of hybrid seeds is labor-intensive and time-consuming; the third is that the economic traits of self-incompatible lines will decline through continuous self-selection, and the degree and speed of trait decline in different varieties and different lines of the same variety are different. Therefore, will reduce seed yield