Breeding method of excellent novel germplasm of soybeans

Abstract

The invention provides a breeding method of an excellent novel germplasm of soybeans. In the method, recurrent selection is carried out by using a male genic sterile gene, the defects of artificial castration hybridization are completely overcome, and the randomness of cross parent selection and crossbreeding efficiency are greatly improved. The recurrent selection technology of the male genic sterile gene is introduced into group hybridization, intercross, backcross and composite cross plans of soybean germplasm, through hybridized combination prepared in a summer net chamber, off-season multiplication for generation addition in winter and secondary generation addition in an artificial phytotron in spring, three generations are realized each year, marker-assisted selection is used, largebatches and multiple types of novel germplasm materials of soybeans can be rapidly obtained by non-destructive quality detection, indoor resistance identification and multi-point adaptability identification, precious and excellent parents are provided for breeding of new varieties, and soybean breeding has infinite potentials.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and relates to a method for breeding excellent new germplasm of soybean, in particular to a method for breeding new soybean germplasm with high oil content, high protein and disease resistance. Background technique [0002] The parental sources of soybean breeding varieties are narrow, and there is a lack of genetic diversity among key varieties, making it difficult to break through in yield and improve stress resistance. Based on the recurrent selection population cultivated by male sterility crossing, this study gathers as many favorable gene pool resources as possible into a gene bank, and continuously excavates various favorable genes in these resources to serve different Breeding needs of ecological regions. my country is the country of origin of soybean and has very rich soybean germplasm resources. These resources contain a variety of beneficial genes that need to be developed and uti...

AI Technical Summary

Problems solved by technology

As soybean is a cleistogamous pollinated crop, its flower organs are small, the pollen survival period is short, and the flowering period is very short, resulting in low efficiency of artificial emasculation for hybridization, and it is very difficult to obtain hybrid seeds, which reduces the aggregation of good genes in hybrid offspring and selection probability, thereby reducing the efficiency of traditional cross-breeding

Images