Rapeseed CMS Lines with Leaf Edge Fully Cracked Marker, Breeding Method and Application

Abstract

The invention provides a breeding method of a rape sterile line with leaf margin holoblastically-carved marker characters. A stable rape selfing line with the leaf margin holoblastically-carved marker characters obtained after distant hybrid breeding of a plant with the leaf margin holoblastically-carved marker characters and rape serves as a male parent, a rape sterile line with excellent productivity serves as a female parent, hybrid breeding is conducted to obtain the rape sterile line with the leaf margin holoblastically-carved marker characters, and the leaf margin holoblastically-carved marker characters in the obtained rape sterile line with the leaf margin holoblastically-carved marker characters have high specificity. The leaf margin holoblastically-carved marker characters are controlled by a pair of dominant major genes, and are stable, free of influences of environmental conditions, deep, obvious, easy to identify and capable of being discovered early. Generally, the characters can be identified when seedling euphyllas appear, and in the breeding process of the sterile line, it is beneficial for identifying and pulling out all the plants not subjected to leaf margin holoblastic carving, mixing with other seeds is prevented, and the purity of the seeds of the sterile line is ensured.

Description

technical field [0001] The invention belongs to the technical field of crop breeding, and in particular relates to a rapeseed sterile line with the trait of full-cracked leaf edge marks, a breeding method and application thereof. Background technique [0002] At present, more than 80% of my country's rapeseed production uses hybrid varieties. Hybrid varieties include three-line hybrids and two-line hybrids. [0003] The production of three-line hybrids includes restorer line propagation, maintainer line propagation, sterile line propagation and hybrid seed production. The specific process is: the seeds of restorer line isolation propagation, the maintainer line isolation propagation seeds; the sterile line is cross-breeding by the sterile line and the maintainer line; the hybrid for field production is obtained by the cross-breeding of the sterile line and the restorer line. [0004] The production of two-line hybrids includes: breeding of restorer lines, breeding of steri...

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the inconspicuous and unstable marker traits of rapeseed in the prior art, which is easily affected by the environment, and it is not easy to distinguish the purity of the population and the true and false hybrids, thereby providing a hybrid with obvious traits and stable traits. 1. Rapeseed CMS line with leaf edge full-cracked marker trait not easily affected by the environment and its breeding method and application, which have remarkable effects in distinguishing the purity of the population and the true and false hybrids

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