Breeding method for rapidly introducing rice target characters

Abstract

The invention discloses a breeding method for rapidly introducing rice target characters. The method includes the following steps that rice resources carrying target characters serve as a male parent or a female parent and are hybridized with a recurrent parent to obtain a hybrid F1; the recurrent parent serves as a female parent to be hybridized with the hybrid F1 to obtain a BC1F1 group; according to 48 molecular markers distributed evenly on 12 chromosomes of rice in the SSR labeling method of a rice variety identification technical regulation, genetic similarity analysis is conducted on a single plant of the BC1F1 group, and a BC1F1 single plant is screened, wherein the BC1F1 single plant carries the target characters and the genetic similarity is higher than 90% compared with the recurrent parent; the recurrent parent serves as a female parent to be hybridized with the BC1F1 single plant, and a plant carrying the target characters and similar to the recurrent parent is bred and selected from later generations. Through the comparison of SSR molecular markers with the recurrent parent, when the genetic similarity is high, the target characters are introduced rapidly and more-efficiently, and the genetic resource innovative breeding speed is greatly increased.

Description

technical field [0001] The invention relates to the field of rice breeding, in particular to a breeding method for quickly introducing target traits into rice. Background technique [0002] To introduce the target traits of rice, the pedigree method is generally used at present, and multi-generation backcross selection is required. In the F1 generation, select true hybrids to backcross with recurrent parents to obtain BC1F1, and then backcross multiple generations (more than 4 generations) to obtain high-generation materials; then, from BC5F2 onwards, select strains that carry target traits and are similar to the parents ; The breeding cycle is long and the workload is heavy, which has become a bottleneck for the innovation of rice germplasm resources. Contents of the invention [0003] In order to solve the above problems, the present invention provides a breeding method for quickly introducing target traits in rice. The target traits can be quickly and efficiently intro...

AI Technical Summary

Problems solved by technology

In the F1 generation, select true hybrids to backcross with recurrent parents to obtain BC1F1, and then backcross multiple generations (more than 4 generations) to obtain high-generation materials; then, from BC5F2 onwards, select strains that carry target traits and are similar to the parents ; The breeding cycle is long and the workload is heavy, which has become a bottleneck for the innovation of rice germplasm resources

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