Crossbreeding method for pyramiding cotton superior traits

A high-quality, trait technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of limitation, genetic narrowing, low genetic improvement efficiency, etc., to improve the genetic improvement efficiency, improve the homozygous efficiency, shorten the The effect of improvement years

Active Publication Date: 2019-07-12
INST OF COTTON RES CHINESE ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with the traditional breeding method is that in the process of crossing the parents, the male parent and the female parent are hybridized, usually a single male parent and a single female parent are selected. Without restrictions, it is difficult to breed excellent varieties with multiple excellent traits, and the efficiency of

Method used

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  • Crossbreeding method for pyramiding cotton superior traits
  • Crossbreeding method for pyramiding cotton superior traits

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Such as figure 1 Shown, the breeding method of the high-quality traits of the cross-polymerized cotton fiber of the present embodiment specifically comprises the following steps:

[0067] S1, select a cotton variety Lu 6269 approved by Shandong Province, a major cotton-producing area in the Yellow River Basin, as a genetically improved recipient, and plant 2 rows;

[0068] S2, select 2 male lines MBI9915 and 69307 with high-quality target traits, and plant 1 row respectively;

[0069] Lu 6269 comes from Shandong Cotton Research Center, and MBI9915 and 69307 come from Cotton Research Institute of Chinese Academy of Agricultural Sciences;

[0070] S3, artificial hybridization: In the middle and late April, the selected female parent and male parent were planted in the experimental base of Zhongmian Institute, Baibi Town, Anyang City, Henan Province. After the pollen is distributed, artificially pollinate the pistils of the female parent flowers that have been detasseled...

Embodiment 2

[0086] Taking MBC31776 as an example, verify the following effects:

[0087] In 2015, at the experimental station of China Cotton Institute in Shihezi City, Xinjiang, the output of seed cotton was 335.7kg, and the output of lint cotton was 135.8kg, which were 105.56% and 103.45% of the comparison Xinluzao 50, respectively. The average length of the upper half of the HVICC fiber is 33.5mm, the specific strength at break is 38.5cN / Tex, the micronaire value is 4.3, the regularity index is 85.8%, and the elongation is 7.2.

[0088] In 2016, the seed cotton output of the China Cotton Research Institute Experimental Station in Shihezi City, Xinjiang, was 346.5kg, and the lint output was 143.3kg, which were 107.94% and 105.88% of the comparison Xinluzao 50, respectively. The average length of the upper half of the HVICC fiber is 33.2mm, the specific strength at break is 36.9cN / Tex, the micronaire value is 4.4, the regularity index is 84.1%, and the elongation is 7.4.

[0089] In 201...

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Abstract

The invention relates to the field of cotton variety breeding, in particular to a crossbreeding method for pyramiding cotton superior traits. The method includes steps: taking a cotton variety authorized in Shandong Province which is a main cotton production region in the Yellow River basin as a female parent, taking two lines with fiber superior traits as male parents, and performing crossbreeding of the female parent with the male parents respectively to obtain a generation F1, wherein at least one of the male parents belongs to chromosome segment substitution lines from gossypium hirsutum and gossypium barbadense or recombinant inbred lines thereof; collecting pollens of stamens of generation F1 plants, mixing, performing pollination backcrossing on the generation F1 plants, and harvesting to obtain a double-cross generation F2; subjecting the generation F2 to continuous selfing for 3-10 times, and screening to obtain cotton superior traits pyramided line. By means of specific multi-parent double-cross pyramiding breeding, the character of high yield of the female parent is kept in the final generation, combining abilities of varieties are explored, pyramiding of superior traitsand certain lines is realized, a superior variety improving term is shortened, and genetic improvement efficiency is improved.

Description

technical field [0001] The invention relates to the field of cotton variety breeding, in particular to a breeding method for high-quality traits of hybridized and aggregated cotton. Background technique [0002] Cotton is an important economic crop in the world and occupies an important position in the economic development of the world and China. Cotton is not only an important fiber crop, but also an important oil crop, which plays a pivotal role in the national economy. Since the 1880s, improving cotton fiber yield traits has always been the most important goal in my country's cotton breeding, but the improvement of cotton fiber quality traits has not received enough attention; my country's cotton fiber quality is at the middle level in the world, and there are still fiber Unreasonable collocation of quality indicators, low fracture specific strength, 1-2cN / tex lower than the average in the United States, etc., cannot meet the needs of the rapid development of my country's...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 龚举武袁有禄刘爱英李俊文邓晓英葛群巩万奎商海红石玉真范森淼邹先炎潘境涛范李强张志斌
Owner INST OF COTTON RES CHINESE ACAD OF AGRI SCI
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