Rapid target property pyramid breeding method for crops

Abstract

A rapid target property pyramid breeding method for crops is disclosed by the invention, and is characterized by comprising the following steps: step A. creating a parent single-copy non-linkage early-flowering plant, wherein the obtained early-flowering plant only possesses one early-flowering gene, and the early-flowering gene and all the target properties needing to be polymerized are not in a same chromosome; and step B. creating a comprehensive-property-improving radical new material by rapidly polymerizing the target properties. An arabidopsis thaliana early flowering gene is used to induct early flowering for a short breeding period, target property markers are used to assist selection, and the target properties are rapidly pyramided to one germplasm by combination of pyramid breeding and backcross purification, and thereby the disadvantage of a long period in a conventional method is overcome, the radical new material with excellent comprehensive properties can be created in 2-3 years, and the efficiency and process of pyramid breeding are substantially accelerated.

Description

Technical field: [0001] The invention belongs to the technical field of crop breeding. Mainly for crops with functional molecular markers for target traits, use Arabidopsis thaliana early flowering gene (FLOWERING LOCUS T, FT gene) to induce early flowering and shorten growth period, use functional markers for target traits to assist selection, and purify through aggregation breeding combined with backcrossing The method quickly aggregates the target traits into the same germplasm, and then quickly creates breakthrough new materials. Specifically, it relates to a rapid aggregation breeding method for target traits of crops. Background technique: [0002] Varieties are the basis of agricultural production. With the development of production and the continuous prevalence of various diseases, agricultural production urgently needs new breakthrough varieties with excellent comprehensive properties to meet production needs. In the actual breeding process, because most of the br...

AI Technical Summary

Problems solved by technology

However, it is still a conventional addition technology, and the total length of time still needs 4-5 years

Moreover, in actual operation, simultaneous identification of multi-objective traits is difficult to achieve, and often excellent plants will die during the identification process, which greatly limits the cultivation of breakthrough varieties with comprehensive traits

[0005] In view of the problems in the prior art, the present invention aims to provide a rapid aggregation breeding method for target traits of crops, using the Arabidopsis early flowering gene to induce early flowering to shorten the breeding generation, and using the target trait functional marker-assisted selection to speed up the identification of target plants Selection, and at the same time, on the basis of the aggregation of target traits, speed up the purification of the genetic background through backcrossing, overcome the shortcomings of conventional methods with a long cycle, quickly create breakthrough new germplasm with excellent comprehensive traits within 2-3 years, and greatly accelerate the aggregation Breeding efficiency and progress

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