Seed production method for cotton cytoplasmic male sterile line by utilizing insect hybridization

Abstract

A disclosed seed production method for cotton cytoplasmic male sterile line by utilizing insect hybridization is characterized by comprising: under the isolation condition, taking cotton cytoplasmic male sterilty male sterile line as a female parent, taking cotton restorer line as a male parent, planting the female parent and the male parent according a line number ratio of 1:4, and taking honeybee as pollination insect to perform cotton hybridization for seed production. According to the method, a box of honeybee can take the place of the pollination workload of one person, the seed production output at a normal year accounts for about 80% of the output of manual seed production, and thus labor is saved, labor intensity is reduced, seed production benefit is improved, and the purity and the quality of the hybridization seeds are guaranteed because of no selfing.

Description

technical field [0001] The invention relates to a crop breeding method, in particular to a method for producing cotton cytoplasmic male sterile lines by hybridizing insects. Background technique [0002] The research and utilization of heterosis can significantly increase the yield, quality and resistance of cotton. Under normal circumstances, hybrid varieties can increase production by more than 10% compared with conventional varieties, and some can reach 30-50%. my country's cotton heterosis research began in the 1930s, but it was not applied to production until the 1980s. However, limited by the research level and production conditions at that time, the production can only use the second generation of hybrids with weak advantages. host. At the end of the 1990s, with the advent of the insect-resistant hybrid Zhong Cotton Institute 29 and the establishment of an efficient artificial hybrid seed production system, the scale and intensification of artificial hybrid seed prod...

AI Technical Summary

Problems solved by technology

In addition, the conditions for seed production are difficult, so it is becoming more and more difficult to find suitable labor

[0008] D. High production costs: Due to the continuous increase of labor prices, the cost of artificial seed production is getting higher and higher. At present, the income of seed production is only slightly higher than that of ordinary commercial cotton, which is not attractive.

[0009] In short, the artificial hybrid seed production method is the main hybrid seed production method in my country at present. This seed production method has many disadvantages such as high labor intensity, cumbersome operation procedures, high production cost, and difficulty in guaranteeing the purity of the seed production.

With the gradual improvement of our country's social living standards, labor costs have risen year after year, and artificial hybrid seed production methods have become less and less suitable for the needs of cotton production and development, and have become the main limiting factor that restricts the further development of hybrid cotton.

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