Seed breeding method of naturally-capped dwarf compact cabbage-type rape

A rapeseed, compact technology, applied in the field of rapeseed breeding, can solve the problem of rapeseed with limited knots, and achieve the effect of improving planting benefits and high efficiency

Inactive Publication Date: 2015-12-09
陕西省杂交油菜研究中心
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  • Abstract
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  • Claims
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Problems solved by technology

At present, there is no report on the method of breeding new varieties of rapeseed with natural topping of main inflorescence and limited knot angle

Method used

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  • Seed breeding method of naturally-capped dwarf compact cabbage-type rape
  • Seed breeding method of naturally-capped dwarf compact cabbage-type rape
  • Seed breeding method of naturally-capped dwarf compact cabbage-type rape

Examples

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Embodiment 1

[0019] Example 1: Breeding experiment of main inflorescence with natural topping, limited knot angle, and dwarf compact rapeseed

[0020] (1) Hybridization: The female parent of Dwarf Brassica napus 3H004 and the compact rapeseed 7399-8 were used as the male parent to obtain the hybrid F 1 . Parents and hybrid F 1 Planted in the field and transplanted in the greenhouse after vernalization outdoors.

[0021] (2) set up double haploid (DH) line group: to the F that step (1) obtains 1 For the plant, the pollen of the young buds on the main inflorescence and the upper branch inflorescence of the plant was taken at the initial flowering stage for microspore culture, and EMS was used for mutagenesis and colchicine for chromosome doubling to obtain 446 double haploid (DH) line populations, Specific steps are as follows:

[0022] 1) Mutation and isolation of rapeseed microspores: at the initial flowering stage of rapeseed, hybrid F 1 The flower buds with a length of 3.0-4.0mm on ...

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Abstract

The invention discloses a seed breeding method of a cabbage-type rape, wherein the seed breeding method is suitable for mechanical harvest and the cabbage-type rape is naturally capped in main inflorescence, is limited in siliques and is dwarf and compact in character. The seed breeding method includes following steps: (1) with the cabbage-type dwarf rapes 3H004 and compact-plant rapes 7399-8 as parents to performing hybridization to obtain an F1-generation; (2) in an early blooming period, selecting the buds being 3.0-4.0 mm in length on the main inflorescence and upper branched inflorescences of the F1 plant, perforning mutagenesis with EMS (ethyl methylsulfonate) and then performing colchicines doubling and microspore induction culture to obtain a DH separated population; (3) with plant height, branch characters, main inflorescence length, total silique number, growth period and oil-containing quantity and the like main characters, performing multi-year and multi-point in-field phenotype character identification to the DH separated population; and (4) selecting the variation materials which is naturally capped in main inflorescence, is limited in siliques, is lower than the upper branched inflorescences in height, is concentrated in blossom period and silique layers, and is dwarf and compact. The method can be used for obtaining the rape which is naturally capped in main inflorescence, is limited in siliques and is dwarf and compact in character. The method, when being popularized, can reduce planting cost of rapes and achieves excellent economical benefit.

Description

technical field [0001] The invention belongs to the technical field of rapeseed breeding, and in particular relates to a breeding method for main inflorescences with naturally capped main inflorescences, limited corner knots, and dwarf compact rapeseeds, which are suitable for mechanized harvesting. Background technique [0002] my country's rapeseed production mechanization level is low, there are few varieties suitable for mechanized harvesting, labor-intensive, labor-intensive, relatively low returns, coupled with rural labor shortages and high costs, make my country's rapeseed industry face severe challenges. According to statistics, in the production process of rapeseed, only the labor input in the harvesting link accounts for 60% of the total labor. Breeding new varieties with high yield and high quality, especially suitable for mechanized harvesting, is an important measure to reduce the production cost of rapeseed and improve the planting efficiency. The creation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/08A01H1/02A01H4/00
Inventor 董育红田建华韦世豪王学芳李永红张耀文关周博赵小平王灏
Owner 陕西省杂交油菜研究中心
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