关键词: 水稻, 选择导入育种策略, 目标性状, 设计育种

Abstract: In recent years, rice genomics has made rapid progress, but how to effectively apply these research results (rich genomic variation and functional gene cloning  etc.) to the precise improvement of complex agronomic traits remains a major challenge and scientific problem of breeding by design. After years of practice, it has been proved that breeding technology by design based on breeding by selective introgression (BBSI) was an effective way of solving those problems, which is a series of breeding strategies by design based on precise genetic information for simultaneous gene mining and improvement of multiple complex traits. It mainly includes: ① the construction of a large number of backcross introgression lines with one or more excellent traits as the material platform of BBSI. ② To build a precise genetic information platform based on whole-genome sequencing and association analysis. ③ The Ideal Target Genomic Constitutions (ITGC) and gene pyramiding methods will be used to efficiently breed target high-quality varieties. This review  described the development history of BBSI and its effective application in molecular breeding by design, especially how to use molecular quantitative genetic theory and genome-wide variation to verify and enrich the strategy. Over the past 20 years, nearly one hundred new green super rice (GSR) varieties had been bred with the implementation of the plan, which provided important theoretical and practical references for the innovative development of crop breeding in the post-genomic era.

Key words: rice, breeding by selective introgression (BBSI), target traits, breeding by design