Customized crop germplasm innovation and fast variety improvement

Directional improvement

For the traits that need to be improved, the materials carrying the target traits are used as donors. Through the breeding methods of hybridization and continuous backcross, combined with molecular marker assisted breeding, the prospect selection of the target gene and the background selection of the whole genome are carried out, so as to quickly and directionally improve the target traits of the recipient materials within 2-3 years, while maintaining the comprehensive excellent traits of the original varieties, The genetic difference before and after improvement meets the requirements.

Comprehensive improvement

If the material to be improved is an amorphous strain, comprehensive improvement can be carried out. Its characteristic is that there is no requirement for the genetic background recovery rate of the improved new materials. The SSR difference of 48 pairs of rice national standard can be ≥ 4 pairs, and the comprehensive agronomic traits may be better.