Breeding method for limited fruit branch type short-season cotton suitable for being planted in Yangtze River valley cotton areas

Abstract

The invention discloses a breeding method for limited fruit branch type short-season cotton suitable for being planted in Yangtze River valley cotton areas, and relates to the field of crop breeding. The method has the advantages that the integral analysis is performed on the basis of agricultural natural resource conditions of light, temperature, water, soil and the like in the Yangtze River valley cotton areas; short season cotton varieties (limited growth type early-maturing cotton germ plasm) in Yellow River valley cotton areas are used as male parents to be treated by breeding methods such as hybridization, backcrossing and system selection with cotton varieties (high-quality high-yield and high-adaptability cotton germ plasm) in the Yangtze River valley cotton areas; disease-resistant high-temperature-resistant high-yield and high-quality new limited fruit branch type short-season cotton varieties adapting to the mechanical high-density planting in the Yangtze River valley cotton areas are obtained.

Description

technical field [0001] The invention relates to the technical field of crop breeding, in particular to a breeding method for short-season cotton with limited fruiting branches suitable for planting in cotton areas in the Yangtze River Basin. Background technique [0002] Since the reform and opening up, the types of cotton varieties in the cotton area of ​​the Yangtze River Basin have become increasingly single, mainly insect-resistant hybrid cotton varieties with unlimited fruit branches or conventional cotton varieties, which are called cotton varieties in the cotton area of ​​the Yangtze River Basin: its main feature is to adapt to the Yangtze River The planting environment in the watershed has excellent comprehensive traits, medium early maturity, good yield, large boll, high temperature resistance, high quality, high lint content, thin shell, smooth floc, high flowering rate before frost, and most of them are resistant to Fusarium wilt. But its growth period is long, an...

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Problems solved by technology

[0004] In order to improve the economic benefits of cotton planting in the Yangtze River Basin and realize the mechanized planting of cotton, people try to introduce the short-season cotton varieties from the cotton area of ​​the Yellow River Basin to the cotton area of ​​the Yangtze River Basin for planting, but the short-season cotton varieties in the cotton area of ​​the Yellow River Basin are not in the Yangtze River Basin. In the cotton planting trials, problems such as poor adaptability, high temperature resistance, smaller boll weight, shorter cashmere length, lower clothing content, and more stiff petals were found.