A kind of insect-resistant low-phenol color cotton sterile line breeding and hybrid breeding method

Abstract

The invention relates to a sterile line selective-breeding and hybrid breeding method of pest-resistant and low-gossypol natural colored cotton. The sterile line selective-breeding and hybrid breeding method is characterized in that low-gossypol Shandong cotton-12 as a female parent and pest-resistant Shandong cotton research center (SCRC)-21 as a male parent are subjected to hybridization matching, and in the F2 generation group, plants of which cotyledons, stems and leaves do not contain gossypol are selected and a low-gossypol cotton line 8HN538 is obtained after continuous selfing plantation of the plants for 3-4 generations; a pest-resistant genic male sterile line variety Shandong RH-1 as a female parent and a nut-brown low-gossypol natural colored cotton parent 00S17 as a male parent are subjected to hybridization matching, pest-resistant plants in the F2 generation group are retained, and male fertile low-gossypol cotton plants are selected and are used for pollination on low-gossypol cotton male sterile plants; nut-brown cotton offspring is selected and retained; a continuous selective-hybridization process is carried out until the 4th generation so that a pest-resistant low-gossypol natural colored cotton genic male sterile line 0-173-3A is obtained; and the low-gossypol cotton line 8HN538 having pest resistance as a male parent and the pest-resistant low-gossypol natural colored cotton genic male sterile line 0-173-3A as a female parent are subjected to hybridization matching plantation so that the pest-resistant and low-gossypol natural colored cotton hybrid is obtained. The pest-resistant and low-gossypol natural colored cotton hybrid has a high yield, good fiber quality and a stable and uniform color, does not contain gossypol in cotton seeds, and greatly improves a comprehensive utilization value.

Description

technical field [0001] The invention relates to the technical field of cotton breeding, in particular to a method for breeding sterile lines of insect-resistant and low-phenol colored cotton and hybrid breeding. Background technique [0002] Cotton is an important fiber oil crop in the world, and cotton fiber is an important raw material for the textile industry. General cotton cultivars have a large number of glands so that in addition to the direct utilization of cotton fibers, cottonseeds with important nutritional value need to spend a lot of money and manpower for detoxification before they can be used. Low-phenol cotton is a type of cotton without pigmented glands. The content of gossypol in its seeds is lower than the standards (0.004%) and national standards (0.002%) stipulated by the World Health Organization (WHO) and the Food and Agriculture Organization of the United Nations (AFO). ), low-phenol cotton varieties contain extremely low content of gossypol, the oil...

AI Technical Summary

Problems solved by technology

In addition, because the planting technology is immature and the insect resistance of colored cotton is poor, it is inevitable to adopt the same planting methods as ordinary cotton, such as fertilization and spraying, which cannot be completely pollution-free