RPAD locus controls prostrate growth habit in Oryza nivara

作者：Yuntao Liu, Fang Yao, Jun Zou, Daokuan Guo, Wanxia Jiang, Jinjian Fan, Ruichao Li, Zhenbin Yang, Yurong Ma, Haodong Deng, Jiayu Huang, Lubin Tan · 发表于：The Plant Genome · 年份：2025 · DOI：10.1002/tpg2.70032 · 被引用次数：4 · 研究领域：Genetic Mapping and Diversity in Plants and Animals、Rice Cultivation and Yield Improvement、GABA and Rice Research

Abstract The development of ideal plant architecture is crucial for optimizing grain yield in crop breeding. The transition from prostrate growth habit in wild rice to erect growth habit in cultivated rice is one of the important events during rice domestication. Here, we identified a yield‐related quantitative trait locus (QTL) cluster on the short arm of chromosome 7 using Teqing/W2014 ( Oryza nivara ) derived BC 3 F 6 population. The introgression line TIL81 containing this QTL cluster exhibited significantly larger tiller angle, increased tiller numbers, and prostrate growth habit compared to the recipient parent Teqing. Using a segregating F 2 population derived from a cross between TIL81 and Teqing, this yield‐related QTL cluster was mapped to a similar position as the known rice plant architecture domestication ( RPAD ) locus controlling rice plant architecture domestication. CRISPR/Cas9‐mediated genome (where CRISPR is clustered regularly interspaced short palindromic repeats) editing of four zinc finger transcription factors ( OnZnF1 , OnZnF6 , OnZnF8 , and OnZnF9 ) within the RPAD locus demonstrated their collective involvement in regulating plant architecture and yield‐related traits. Notably, the knockout lines harboring all four zinc finger gene mutations exhibited plant architecture traits and grain yield per plant comparable to the control Teqing. These findings demonstrated that RPAD locus in O. nivara functions in prostrate growth habit and provided new insig...