Abstract: To overcome the industrial bottleneck of “high quality but low priceˮ of traditional white-grained Jingshan Qiaomi, enrich varietal types and enhance industrial added value, a rapid breeding system was established within a full-growth-period intelligent breeding facility. Using Yangxizao as the recipient parent and Yunnan local rice variety Yunzi No.1 as the donor parent, a breeding strategy involving “one cross, two backcrosses, and three self-crosses” was implemented. This approach was combined with precise screening techniques using gene chips and phenotypic selection, successfully developing a new purple-black-grained Jingshan Qiaomi rice line, named Purple-black Yangxizao. The results showed that the new line retained the core agronomic traits of Yangxizao, including plant type, growth period, and other key characteristics, while achieving the specific improvement of purple-black brown rice. This provided high-quality germplasm resources for the functional and distinctive development of the Jingshan Qiaomi industry.

Key words: Jingshan Qiaomi, purple-black brown rice, intelligent breeding factory covering the entire growth period, genome-wide breeding technology, phenotypic screening, rice gene chip