Breeding process of high temperature resisting cotton hybrid

Abstract

The breeding process of high temperature resisting cotton hybrid belongs to the field of crop hybrid breeding technology. The breeding process includes the following steps: 1. selecting parents for hybridizing to obtain cotton hybrid F1; 2. planting cotton hybrid F1 based on the randomized block experiment design and field surveying single plant cotton boll number and boll forming rate; 3. indoor in vitro pollen culture to measure the pollen germination rate and pollen tube growth speed; and 4. screening through principal component analysis. The said process can culture high temperature resisting cotton hybrid with high yield, powerful adaptability and high cotton quality.

Description

technical field [0001] The invention relates to a method for breeding high-temperature-resistant cotton hybrids, which is specially used for breeding high-temperature-resistant cotton hybrids, and belongs to the field of stress-resistant breeding of crops. Background technique [0002] Global warming has aroused widespread concern among agricultural scientists. According to predictions, the temperature will rise by 1.4-5.8°C in the second half of this century, and extreme climates such as high temperature and drought will occur more frequently. As the global climate warms, high temperature stress has become an important factor affecting crop production. Simulation results show that if no measures are taken, by the second half of this century, the output of several major crops such as wheat, rice, and corn in my country may drop by up to 37%. In my country's cotton-growing areas, especially in the Yangtze River Basin, periodic heat damage above 35°C often occurs from July t...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a new method for breeding high-temperature-resistant hybrid cotton varieties, to cultivate high-temperature-resistant cotton hybrids with strong boll-setting, high yield and strong adaptability, and to solve the problem of hybrid cotton planting areas in the Yangtze River Basin in my country. From August to August, there are often high temperature and adverse conditions that cause buds to fall off and seriously affect the yield and quality of lint cotton, so as to enhance the adaptability of the variety and stabilize the cotton yield

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