Method based on genome size and for improving cruciferous crop characters

Abstract

The invention discloses a method based on genome size and for improving cruciferous crop characters. The method includes: S1, collecting germplasm resources of cruciferous crops, and measuring genomesize E; S2, subjecting genome size relative difference percent T to reciprocal crossing of 2-20% cruciferous crops to obtain F1 generation; S3, planting the F1 generation, and performing artificial castration; S4, using a rape dihaploid inducer to induce the F1 generation to obtain a Y1F2 generation; S5, planting the Y1F2 generation, selecting orderly single plants with normal fertility and ploidyfor selfing to obtain a Y1F3 generation; S6, planting the Y1F3 generation, identifying its stability, and analyzing normal distribution condition of genome size Eyx of the Y1F3 generation; S7, investigating target character of the Y1F3 generation; S8, selecting a strain with the target character and Eyx positioned within 3-5% of two ends of normal distribution as an improved breeding new material. The method has the advantages of short improving period, high efficiency and low cost.

Description

technical field [0001] The invention belongs to the technical field of crop breeding and relates to a method for improving the traits of cruciferous crops according to the genome size. Background technique [0002] Cruciferous crops include Chinese cabbage, pak choy, Chinese cabbage, kale, seaweed stalk, wutah, turnip, floret, green cabbage, cabbage type rape, head cabbage (cabbage), collard greens, bush cabbage, Brussels sprouts Cabbage, kohlrabi, kale, cauliflower (cauliflower), broccoli, kohlrabi, Brassica napus, mustard greens, mustard mustard, mustard rape, radish and other crops are common ingredients on the table because of their high dietary Features such as fiber, low calorie, and rich nutrients provide people with high-quality nutrition. At the same time, rapeseed among cruciferous crops is also a major oil crop, and its seeds are an important source of edible oil, providing people with rich polyunsaturated fatty acids. It can be seen that cruciferous crops have ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a method for improving the traits of cruciferous crops based on the size of the genome, so as to obtain excellent parents of cruciferous crops, and to solve the problem of strong dominant combination in the process of cruciferous crop heterosis utilization For the selection and improvement of parents, there is no need for continuous self-crossing of parents for multiple generations, let alone continuous backcrossing of stable parents for multiple generations, so as to select and breed parents with higher and better traits.

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