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Breeding method of high oil content and disease-resistant rapeseed germplasm

A technology for oil content and rapeseed, which is applied in the agricultural field to achieve the effects of high efficiency, shortening the effective selection period, and increasing the selection pressure and selection probability.

Inactive Publication Date: 2019-01-15
陕西省杂交油菜研究中心
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned technologies, and provide a method for breeding germplasm of high oil content and disease-resistant rapeseed. The lack of male hybridization greatly improves the randomness of hybrid parent selection and the efficiency of hybrid breeding

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  • Breeding method of high oil content and disease-resistant rapeseed germplasm

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Embodiment Construction

[0015] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] like figure 1 Shown, a kind of breeding method of high oil content disease-resistant rapeseed germplasm, comprises the following steps:

[0017] Step 1. Determine 4-5 main aggregation traits such as high oil content, low stalk, powdery mildew resistance, and downy mildew according to the rapeseed breeding goal. For each trait, select 2-5 copies in the material nursery with different genetic backgrounds and prominent target traits , materials with better comprehensive properties, after being vernalized outdoors, paired in pairs according to different properties, and transplanted in rows in the greenhouse (see figure 1 ). The male sterility of rapeseed was induced by interlaced treatment with hybrid agent SX-1 at budding stage, and the induced sterile plants were used as mothers to cross bagging with the male p...

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Abstract

The invention discloses a breeding method of a high oil content disease-resistant rapeseed variety. The method comprises inducing male sterility of an excellent variety through a chemical hybridizing agent SX-1, carrying out hybridization, multiple crossing and backcrossing on various varieties to obtain a multigene aggregation group, carrying out disease resistance identification and apparent character selection on the multigene aggregation group to obtain a single plant having excellent integrated properties, carrying out microspore culture on the single plant, carrying out disease resistance identification on the obtained double haploid segregation population, carrying out different-area allopatric generation adding and shuttle breeding to obtain a variety Lxn having high oil content, low pole height and powdery mildew and downy mildew resistance. Compared with the traditional rapeseed polygene pyramiding technology, the breeding method has high efficiency, easily realizes synchronous pyramiding of multiple excellent genes and improvement of properties, easily realizes massive hybridization in gene pyramiding selection, improves population selection pressure and probability and significantly shortens a effective selection cycle.

Description

technical field [0001] The invention belongs to the technical field of agriculture and relates to a method for breeding rapeseed germplasm, in particular to a method for breeding rapeseed germplasm Lxn with high oil content and disease resistance. Background technique [0002] Germplasm resources are the material basis for the selection and breeding of new crop varieties. Brassica napus is the main cultivar of rapeseed in my country, but as an allogenic amphidiploid species, its origin history is relatively short, and its genetic background is relatively narrow. In addition, Brassica napus is imported from abroad, and the genetic basis is relatively simple. Therefore, Carrying out the innovation of germplasm resources of Brassica napus is of great significance to broaden the genetic basis of Brassica napus, enrich genetic resources, and promote the improvement of rapeseed yield, oil content, quality and resistance in my country. [0003] In the process of innovation of new v...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 李永红李建厂郭徐鹏王灏李殿荣董育红张振兰陈文杰韦世豪赵小平
Owner 陕西省杂交油菜研究中心
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