Novel method for breeding early maturing type cotton
A new method, cotton technology, applied in the field of early-maturing cotton breeding, can solve the problems of increased difficulty in breeding, narrow genetic base, lack of germplasm resources, etc., and achieve the effects of stable agronomic shape, expanded genetic base, and sufficient vegetative growth
Inactive Publication Date: 2018-06-29
HENAN INST OF SCI & TECH
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Problems solved by technology
[0003] However, there are many difficulties in the breeding of such multi-target traits. Firstly, there is a lack of germplasm resources with these traits; secondly, most of the existing early-maturing cotton varieties come from the early-maturing source of cotton, which has a narrow genetic basis; and early-maturing and yield, The negative correlation between qualities intensifies the difficulty of breeding. In order to breed breakthrough varieties, breakthrough materials must be available.
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Embodiment 1
[0021] A new method for early-maturing cotton breeding, comprising the following steps:
[0022] S1, sowing in autumn, using mid-ripening cotton material Zhongmiansuo 12 with a growth period of about 140 days as the female parent, Klaudsky cotton as the male parent, the parents were potted, placed in the greenhouse in winter, and the female parent was emasculated before flowering. For hybridization, apply honey solution with a volume concentration of 20% on the stigma of the female parent, drip 30ppm cytokinin inside and outside the bracts, for 4-7 days in a row, once a day, to regulate the fertilization process and embryonic development, and obtain hybrid F in the next spring. 1 generation;
[0023] S2, with F 1 Substitute as the female parent, Klaudsky cotton as the male parent, the female parent is emasculated, and backcrossed to obtain F 2 generation, the F 2 F 3 generation;
[0024] S3 to S2 in F 3 As the male parent, mid-mature cotton material Zhongmiansuo 12 was u...
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The invention belongs to the technical field of crop variety breeding and in particular relates to a novel method for breeding early maturing type cotton. The novel method comprises the following steps: taking a medium-mature cotton material as a female parent and gossypium klotzschianum anderss as a male parent, and carrying out hybridization to obtain an F1 generation; taking the F1 generation as the female parent and the gossypium klotzschianum anderss as the male parent, and carrying out back-crossing to obtain an F2 generation; carrying out south reproduction generation-adding selfing onthe F2 generation to obtain an F3 generation; taking the F3 generation as the male parent and the medium-mature cotton material as the female parent, and carrying out the back-crossing to obtain an F4generation; carrying out multi-generation back-crossing and screening to obtain an Fn generation which meets breeding standards, becomes mature early and has an abundant yield; carrying out a plurality of times of the selfing until early mature and abundant yield properties are stable. The novel method provided by the invention combines good properties of cotton wild varieties and cultivation varieties, and a novel early-mature and abundant-yield cotton variety is obtained through various breeding manners including the hybridization, the back-crossing and the selfing; the cotton has stable agronomic characteristics and is suitable for mechanical picking, so that a lot of labor cost is saved.
Description
technical field [0001] The invention belongs to the technical field of crop variety breeding, in particular to a new early-maturing cotton breeding method. Background technique [0002] Cotton belongs to the genus Gossypium of Malvaceae. It is native to the subtropical zone. There are four cultivated cotton species: Asian cotton, grass cotton, upland cotton and sea-island cotton. The cotton cultivated in the world is mainly upland cotton and sea-island cotton. The planting area of upland cotton in my country accounts for more than 98% of the total area of cotton fields in the country, and sea-island cotton is planted in some areas of Xinjiang. my country is divided into three major cotton-producing regions, including the Yangtze River Basin, the Yellow River Basin and the Northwest Inland Cotton Region. With the development of modern agriculture, cotton production has an increasing demand for new varieties that are early-maturing, high-quality, high-yielding and suitable...
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IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 王青连张金宝董娜张新付远志孙润润王园园李成奇胡根海张志勇秦腾飞薛惠云张晓红韩振甫谭阳光董涛韦春艳
Owner HENAN INST OF SCI & TECH