Breeding method of cotton with high-yield characters

Abstract

The invention relates to the technical field of cotton breeding and discloses a breeding method of cotton with high-yield characters. Multiple high-yield female parent varieties are selected as receptors and mixed for plantation, multiple male parent varieties with target characters are selected, pollen in each male parent variety is collected, pollen is sufficiently mixed and left to stand at thetemperature of 40 DEG C for 40 min, then, the temperature is recovered to the room temperature, multi-male-parent pollen with all target characters is obtained, and hybridization, selfing and other steps are performed. The method is a cross breeding method adopting many-to-many parent pollination, the high-yield character of female parents is reserved in the filial generation to the greatest extent, the combining ability of the varieties is dug, multiple good characters are polymerized in one variety, the age limit for improvement of the varieties is shortened and the genetic improvement efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of cotton breeding, and in particular relates to a breeding method for polymerizing high-yield traits of cotton. Background technique [0002] Cotton is an important economic crop and strategic resource. The cotton industry occupies an important position in the national economy. Aggregating a variety of cotton varieties with excellent traits and providing production applications plays a vital role in the increase of cotton production and the prosperity of the industry. Commonly used cotton breeding methods mainly include selective breeding, sexual cross breeding, hybrid breeding and mutation breeding. Although modern transgenic technology is gradually developed, it has been successfully applied to cotton breeding, bred transgenic monovalent insect-resistant cotton and transgenic bivalent insect-resistant cotton, also bred Verticillium wilt resistant germplasm transgenic chitinase gene, transgenic animal kera...

AI Technical Summary

Problems solved by technology

However, the problem with the traditional breeding method is that in the process of parental hybridization, the hybridization between the male parent and the female parent, usually a single male parent and a single female parent, this selection makes the recombination of the excellent traits of the hybrid offspring subject Due to the limitation, it is difficult to breed an excellent variety that combines multiple excellent traits at the same time, and the efficiency of genetic improvement is low