Breeding method of insect-resistant upland long stapled cotton

Abstract

The invention discloses a breeding method of insect-resistant upland long stapled cotton. By adopting CRICAAS (Cotton Research Institute of Chinese Academy of Agricultural Sciences) No. 12 as a female parent and Darwinii cotton as a male parent, hybridization is carried out; F1 hybrid is used as a female parent, backcross on the F1 hybrid and the CRICAAS No. 12 is carried out for three times to obtain BC3F1; by using the BC3F1 as the female parent, hybridization on the BC3F1 and parental L41 of Xiangzamian No. 3 is carried out to obtain hybrid generation 1 used as a female parent, modification backcross on the hybrid generation 1 and the BC3F1 is carried out, and the backcross is carried out for four times to obtain BC4F1; then by using the BC4F1 as a female parent, the hybridization on the BC4F1 and Xinhai No. 5 is carried out, the backcross on the obtained hybrid generation 1 used as the female parent and the BC4F1 is carried out for four times; cotton-sealing inbreeding is carried out for six times, and separation is produced; finally, the insect-resistant long stapled cotton Xiang C176 is obtained. The yield of the Xiang C176 obtained by the invention is far higher than that of sea island cotton, and the insect-resistant upland long stapled cotton can be demonstrated and popularized in national main cotton planting areas, thereby increasing the self-supply ability of the long stapled cotton in China, and increasing the market competitiveness of high-grade raw cotton.

Description

technical field [0001] The invention relates to the technical field of cotton variety breeding, in particular to a method for breeding insect-resistant upland long-staple cotton. Background technique [0002] Long-staple cotton is the raw material for spinning high-count yarn and special textile industry. With the improvement of people's living standards and the development of modern high-speed spinning technology, the demand for long-staple cotton in domestic and international markets will continue to increase. Long-staple cotton generally refers to sea-island cotton. my country's long-staple cotton is only grown in Xinjiang, but the sea-island cotton planting area is limited and the output is extremely low. The annual output of sea-island cotton used to produce long-staple cotton in my country is less than 100,000 tons, while the annual demand About 500,000 tons, more than 80% need to be imported, "foreign goods entering the market" seriously plague the healthy and sustaina...

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Problems solved by technology

Long-staple cotton generally refers to sea-island cotton. my country's long-staple cotton is only grown in Xinjiang, but the sea-island cotton planting area is limited and the output is extremely low. The annual output of sea-island cotton used to produce long-staple cotton in my country is less than 100,000 tons, while the annual demand About 500,000 tons, more than 80% need to be imported, "foreign goods entering the market" seriously plague the healthy and sustainable development of my country's cotton industry

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