Wang Chunli, Li Juan, Zhu Qian, Li Junjie, Zhang Cui, Hong Ruke, Huang Dajun, Zhang Zhonglin, Xu Jin, Li Dandan, Wen Jiancheng, Li Chengyun, Zhu Youyong, Lee Dongsun, Chen Lijuan
Rice Research Institute, Yunnan Agricultural University, Kunming 650201, China.
State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China.
Int J Mol Sci. 2025 Mar 31;26(7):3246. doi: 10.3390/ijms26073246.
'Dianheyou615' (DHY615) is an elite Dian (D1)-type hybrid rice variety, renowned for its high yield, exceptional grain quality, and unique adaptability to both irrigated and rainfed conditions in the Yungui Plateau of southwestern China. However, the genetic mechanisms underlying the agronomic performance of the D1-type hybrid rice remain unclear. In this study, a comprehensive analysis of 'DHY615''s agronomic performance, genetic genealogy, and molecular genetic foundation was conducted to dissect its desirable traits for upland rainfed cultivation across diverse ecological environments. The main findings indicate that 'DHY615' possesses 6432 heterozygous SNPs, with 57.48% and 14.43% located in the promoter and coding regions, respectively, potentially affecting key phenotypic traits. High-impact SNPs variants and numerous well-known functional genes were identified, such as , , , , , , , , , , , and , which are likely linked to traits including plant architecture, grain yield, grain quality, and resistance to various biotic and abiotic stresses (e.g., disease, cold, drought, salt, high iron, and high UV radiation). Notably, 'Nan615' harbors a greater number of functional allele variants compared to 'H479A', which potentially explaining its superior grain yield and remarkable adaptability. This study offers novel and valuable insights into the molecular genetic foundation of the plateau D1-type hybrid rice, underscoring its potential for sustainable rice production across diverse ecological zones, especially with its unparalleled high-altitude adaptability to rainfed upland planting.
“滇禾优615”（DHY615）是一个优良的滇（D1）型杂交水稻品种，以其高产、优异的稻米品质以及对中国西南部云贵高原灌溉和雨养条件的独特适应性而闻名。然而，D1型杂交水稻农艺性状表现的遗传机制仍不清楚。在本研究中，对“DHY615”的农艺性状表现、遗传谱系和分子遗传基础进行了全面分析，以剖析其在不同生态环境下旱作雨养种植的优良性状。主要研究结果表明，“DHY615”拥有6432个杂合单核苷酸多态性（SNP），分别有57.48%和14.43%位于启动子区和编码区，可能影响关键表型性状。鉴定出了高影响SNP变异和许多知名功能基因，如……，这些基因可能与包括株型、籽粒产量、稻米品质以及对各种生物和非生物胁迫（如病害、寒冷、干旱、盐害、高铁和高紫外线辐射）的抗性等性状相关。值得注意的是，与“H479A”相比，“南615”含有更多的功能等位基因变异，这可能解释了其更高的籽粒产量和显著的适应性。本研究为高原D1型杂交水稻的分子遗传基础提供了新颖且有价值的见解，强调了其在不同生态区域实现水稻可持续生产的潜力，特别是其对雨养旱作种植无与伦比的高海拔适应性。
