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Molecular breeding method capable of improving length of cotton fibers by using gossypium barbadense chromosome segment introgression line

A chromosome fragment, cotton fiber technology, applied in the direction of plant genetic improvement, botanical equipment and methods, applications, etc., to achieve the effect of long breeding cycle

Inactive Publication Date: 2012-11-14
NANJING AGRICULTURAL UNIVERSITY
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Problems solved by technology

However, the offspring of the two hybrids showed the typical crazy separation of interspecific hybridization. Cotton breeders have been trying hard to breed new varieties with both high yield of upland cotton and high quality of sea island cotton, but without success

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  • Molecular breeding method capable of improving length of cotton fibers by using gossypium barbadense chromosome segment introgression line

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Embodiment Construction

[0017] Selected parents: The Cotton Research Institute of the State Key Laboratory of Crop Genetics and Germplasm Innovation of Nanjing Agricultural University uses the upland cotton genetic standard line TM-1 as the recurrent parent, and the disease-resistant and high-quality Sea Island Cotton Sea 7124 strain as the donor parent (non-recurrent parent) , combined with SSR molecular marker-assisted selection covering the whole genome in the high generation of backcrossing, 174 sea-island cotton chromosome segment introduction lines with the background of TM-1, the first domestic upland cotton genetic standard line, were bred, and the genome coverage rate reached 83.5%. Through the continuous 2-year cotton fiber quality inspection of the sea-island cotton chromosome segment introduction line, the introduction line IL040-A4-1 with fiber length significantly better than the control was screened out. The fiber length of the introduction system is 31.32-31.45mm, the fiber strength is...

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Abstract

The invention discloses a molecular breeding method capable of improving length of cotton fibers by using gossypium barbadense chromosome segment introgression line, which is particularly used for crop (cotton) economical character oriented improvement and new variety bredding. An introgression line IL040-A4-1 of which the fiber length is increased obviously is screened out by cotton fiber detection of the gossypium barbadense chromosome segment introgression line. In the method, introgression line is used as a nonrecurrent parent, Xinluzao No.26, which is a variety promoted in cotton area innorth of Xinjiang, is used as a recurrent parent are hybridized, hybridizing, two generations of back crossing and three generations of selfing are performed, molecular markers are also used to help to select cotton new lines with high fiber length. A high-quality and high-yield cotton new line named 'Nannong Haidao No.1' was bred by using the method.

Description

(1) Technical field [0001] The present invention is a molecular breeding method for improving cotton fiber length by using sea-island cotton chromosome segment introduction line, which is specially used for rapid and effective breeding and production of new cotton strains (new varieties) with excellent fiber length. (2) Background technology [0002] Cotton is an important economic crop worldwide. China is a big cotton producer, consumer and textile country. As a major cotton-producing country, my country's main cotton-producing areas cover 16 provinces, municipalities (autonomous regions), with an annual cotton planting area of ​​70-80 million mu, with a total output of about 6 million tons, accounting for a quarter of the world's total output. With the advancement of textile technology, textile products have also developed from coarse-count yarns to high-count yarns and even spun yarns of 100 counts, and the processing objects have also developed from ordinary medium-stap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12Q1/68A01H1/02A01H1/04A01H5/00
Inventor 张天真王鹏郭旺珍曹志斌
Owner NANJING AGRICULTURAL UNIVERSITY
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