Breeding method of glyphosate-resistant cotton genic male sterility dual line

Abstract

The invention provides a breeding method of a glyphosate-resistant cotton genic male sterility dual line, and relates to the technical field of new crop variety breeding. A sterile plant in the cotton genic male sterility dual line is hybridized with a glyphosate-resistant line, the sterile plant of the genic male sterility dual line is used as a recurrent parent (female parent) and is continuously backcrossed with a glyphosate-resistant fertile plant (male parent) in a filial generation for six generations, the glyphosate-resistant sterile plant and the fertile plant are selected for hybrid propagation, the glyphosate-resistant fertile plant in the next generation of planting is selfed to harvest single plants, the plants are planted to form plant rows, all the plant rows with glyphosate resistance are selected for continuous three generations of plant cross, and the glyphosate-resistant cotton genic male sterility dual line is cultivated. The breeding method is reasonable in step and easy to operate, the bred glyphosate-resistant genic male sterile line is high in hereditary purity, the glyphosate-resistant genic male sterile line is used as the female parent for producing genic male sterile hybrids, glyphosate can be sprayed to a seed preparation field for weeding, and therefore labor investment is reduced, labor is saved, and the production cost of hybrid cotton is reduced.

Description

technical field [0001] The invention belongs to the technical field of breeding of new crop varieties, and in particular relates to a breeding method of glyphosate-resistant cotton male sterile dual-purpose lines. Background technique [0002] As an important economic crop and strategic resource, cotton industry occupies an important position in the national economy. At present, the hybrid cotton varieties used in production are mainly artificial emasculated hybrid cotton, cytoplasmic sterile three-line hybrid cotton and nuclear sterile dual-purpose line hybrid cotton. Restricted the further development of hybrid cotton. [0003] The research and utilization of GMS hybrid cotton has continued since the 1970s, and it is one of the three hybrid cottons currently used in large-scale cotton production. Compared with artificial emasculated hybrid cotton, the seed production of genie male sterile hybrid cotton does not require manual emasculation, the seed production procedure i...

AI Technical Summary

Problems solved by technology

Compared with artificial emasculated hybrid cotton, the seed production of genie male sterile hybrid cotton does not require manual emasculation, the seed production procedure is simplified, the labor required for seed production is greatly reduced, and the efficiency is greatly improved. It is a hotspot in the research of hybrid cotton, but at the same time, the genetic male sterile hybrid cotton still needs manual weeding during planting, especially most cotton is not tolerant to glyphosate, and the normal growth of cotton will be affected after spraying glyphosate

With the continuous increase of labor price in our country, the seed production cost of GMS dual-purpose line hybrid cotton has increased significantly

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