Method for producing hybrid seeds by use of pepper genic male sterile line and restorer line

Abstract

The invention provides a method for producing hybrid seeds by use of pepper genic male sterile line and restorer line. The method comprises the following steps: 1, planting a pepper genic male sterile AB line and a restorer line in an area or a greenhouse where pepper plants are capable of overwintering cultivation respectively, taking sterile plants of the genic male AB line as female parent and taking the restorer line as male parent to perform hybridization so as to produce hybrid seeds; 2, pruning aerial parts of the sterile plants and the restorer line plants after the harvest of hybrid seeds in winter and then performing overwintering cultivation; 3, pruning and tidying dormant buds of the overwintering plants after the dormant buds sprout next year, taking the sterile plants as the female parent and taking the restorer line as the male parent to perform hybridization during florescence so as to produce hybrid seeds; and 4, repeating a step 2 and a step 3 three to four times. The method can continually harvest pepper hybrid seeds in a plurality of years after seeding once in a year, saves labor and time for hybrid seed production, is low in cost and long in heterosis-holding time, capable of guaranteeing the yield and quality of hybrid peppers and convenient for commercial application, and has important significance for popularizing the technology of utilizing pepper heterosis.

Description

technical field [0001] The invention relates to the technical field of vegetable hybrid seed production, in particular to a method for hybrid seed production using capsicum genital male sterile dual-purpose lines. Background technique [0002] The utilization of hybrid vigor in pepper is one of the effective ways to increase the yield, quality and stress resistance of pepper. Studies at home and abroad have shown that the yield increase of the first generation of pepper hybrids is generally 30-50%. However, peppers are characterized by continuous flowering and fruiting, long flowering periods, and scattered flowers. Therefore, the research and utilization of hybrid vigor is more difficult than the concentrated flowering of rice and corn. The crop is much larger as a result. There are three determinants of heterosis utilization, one is the strength of hybrid vigor, the other is the cost of hybrids, and the third is the difficulty of the seed production process. [0003] At ...

AI Technical Summary

Problems solved by technology

[0003] At present, the methods of applying hybrid advantage of pepper in production mainly include: using the direct grouping method of artificial emasculation pollination, the production cost of seeds is high, and the purity is difficult to guarantee; The production of these species has begun to appear, but they all need to be planted once a year. Both the male sterile line and the restorer line need to be multiplied, which increases the cost of seed production; the genetic variation and degeneration of the parents will inevitably occur during the breeding process, resulting in The reduction of hybrid vigor affects the yield, quality and stress resistance of pepper