A method for cultivating Zhong 425, a new line of early-maturing, high-yield, and high-quality short-season cotton

Abstract

The invention relates to the field of breeding, in particular to a method for cultivating a precocious high-yield high-quality short season cotton novel strain 425. The method comprises the following steps: by taking an early-maturing variety, that is, the CCRI 10 (female parent) as a basic germplasm material, breeding a precocious high-quality series Zhong 0710 together with a precocious high-yield anti-disease short season cotton variety (series) American B early series (male parent), hybridizing with a high-yield anti-disease series Zhong 5427 (male parent), breeding a CCRI 27, hybridizing with a super-precocious series 92-047 (male parent), further breeding a strain Zhong 501, hybridizing with a super-precocious series Zhong 603 (male parent), and performing parent rotational crossing for multiple times with core collections. As the precocious, high-yield, high-quality and multi-resistant excellent genes are combined together, the negative relevant relationship of precocity and yield and quality and resistance of short season cotton varieties is broken, the precocious high-yield (high ginning outturn) high-quality anti-disease short season cotton novel strain Zhong 425 is cultivated.

Description

technical field [0001] The invention relates to the field of breeding, in particular to a method for cultivating Zhong 425, a new line of early-maturing, high-yield, and high-quality short-season cotton. Background technique [0002] Since 1919, my country has introduced king's cotton (King's) from the United States for testing. Because of its early maturity and strong boll formation, it has been gradually popularized in my country. After years of domestication, it has become the main "precocious source" of short-season cotton breeding in my country. At present, the early-maturing "gene source" used in early-maturing short-season cotton breeding is mainly American cotton, of which Jinzi cotton is the dominant early-maturing germplasm. [0003] my country's short-season cotton breeding has made remarkable achievements. Through breeding methods such as introduction and trial breeding, systematic breeding, hybrid breeding, distant hybridization, hybrid advantage utilization, m...

AI Technical Summary

Problems solved by technology

In the 1980s, my country's first generation of early-maturing, high-yielding short-season cotton variety Zhongmiansuo No. 10 was bred. In the national regional test, the yield increased by 20% compared with the control, and a major breakthrough was made. This variety was better than the Heishan cotton popularized at that time No. 1 matured 8 days earlier, and matured 25 days earlier than Zhongmiansuo No. 12, which was the spring sowing cotton. For the first time in the North China cotton area, wheat and cotton were double-cropped, and a total of 70 million mu was planted; however, Zhongmiansuo No. 10 had certain shortcomings. On the surface, it shows premature maturity and premature aging, and is not resistant to blight and Verticillium wilt; in the late 1980s, it aimed at the shortcomings of Zhongmiansuo No. 10

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