Soybean is the main dietary protein for human consumption, poultry and livestock feed. Exploring molecular methods to increase the genetic gain of soybean grain protein has been one of the main challenges faced by soybean breeders and geneticists.
The soybean research center of Institute of Cereal and Oil Crops published a research paper entitled “Identification of candidate genes and genetic selection for seed protein in soybean breeding pipeline” on Frontiers in plant science. This achievement is the first paper on the identification of soybean protein candidate genes and the application of genome selection breeding published by the research center, on the basis of soybean yield, disease resistance and genome selection of amino acid components in seeds.
This study reported the identification and genome-wide selection of soybean seed protein candidate genes. Using the natural population with abundant allelic variation and the recombinant inbred line population derived from “Jidou 12” and wild soybean to jointly locate the QTL related to grain protein, it was found that the QTL(Chr06_18844283-19315351) on chromosome 6 was a new locus. The results showed that the accuracy of genome selection depended on the size of SNP set and training population. The accuracy of genome-wide selection based on the effect SNP of GWAS was higher than that of random 22 SNPs-500 SNPs. When the number of random markers was greater than 2000, the genome-wide selection reached a plateau.
The SNPs markers identified in this study and other information are very important for establishing effective molecular marker assisted delection and genome-wide selection breeding processes to improve soybean grain protein content and guide soybean high protein breeding.
（Source from www.hebnky.com）