As a food consumed by more than half of the world’s population, rice (Oryza sativa) has always been a hot spot in plant science research. The three most important agronomic traits of rice, the yield, plant height, and flowering time, are controlled by many quantitative trait locus (QTLs). In this study, a newly identified QTL, qHD19, was found to be controlled by a single recessive gene. Using two populations with chromosome segment substitutions, qHD19 was narrowed to a 22.5-kb region containing three putative genes, one of which encoded a ZOS5-02-C2H2 zinc finger protein. This gene was regarded as the qHD19 candidate. Further analysis showed that the amino acid sequence encoded by the qHD19 gene included two amino acid mutations, (84): lysine (L) replaced by phenylalanine (F), and (169): alanine (A) replaced valine (V), and these mutations are expected to significantly alter the functions of the protein. Additionally, the CSSL87 and CSSL88 lines containing the qHD19 gene not only exhibited a shorter plant height but also exhibited a higher yield, which showed that the qHD19 gene presents good application prospects in rice breeding. Taken together, these data indicate that qHD19 probably plays an important role in the signaling network of photoperiodic flowering as well as the regulation of plant height and yield potential.

作为世界上一半以上人口食用的食物，水稻（Oryza sativa）一直是植物科学研究的热点。水稻的三个最重要的农艺性状，即产量，株高和开花时间受许多数量性状位点（QTL）控制。在这项研究中，新发现的QTL qHD19被发现由单个隐性基因控制。使用两个具有染色体节段替换的种群，qHD19缩小为包含3个推定基因的22.5kb区域，其中一个编码ZOS5-02-C2H2锌指蛋白。该基因被认为是qHD19候选物。进一步分析表明，qHD19编码的氨基酸序列该基因包含两个氨基酸突变，（84）：由苯丙氨酸（F）取代的赖氨酸（L）和（169）：缬氨酸（V）取代的丙氨酸（A），这些突变有望显着改变蛋白的功能。此外，含有qHD19基因的CSSL87和CSSL88品系不仅表现出较短的株高，而且具有较高的产量，这表明qHD19基因在水稻育种中具有良好的应用前景。综上所述，这些数据表明qHD19可能在光周期开花的信号网络以及植物高度和产量潜力的调节中起重要作用。