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

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...

AI Technical Summary

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

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