Identification and Utilization of the Soybean Plant Height Locus PH19-31
2025
Manqing Ling | Xin Su | Xiping Hu | Xiang Zhang | Yongzhe Gu | Zhangxiong Liu | Jiankun Xie | Lijuan Qiu
Plant height is a key agronomic trait in soybeans, directly influencing yield potential and agronomic performance. In this study, the tall-stem cultivar Heinong 63 and the dwarf-stem cultivar Longken 3077, along with their F<sub>2</sub> populations, were used as experimental materials. A preliminary mapping using the bulk segregant analysis sequencing (BSA-Seq) approach enabled us to locate the target locus within a 1.8 Mb interval, which was subsequently narrowed to a 48.3 kb region using simple sequence repeat (SSR) and insertion and deletion (InDel) markers. The interval was designated as PH19-31 and contained nine annotated genes. One InDel marker, PL7, was developed within this fine-mapped region. Based on an expression analysis of the nine candidate genes, <i>Glyma.19G230000</i> and <i>Glyma.19G230200</i> were identified as potential regulators of plant height in soybeans. This study provides valuable materials and technical support for the cloning of plant height-related genes and the molecular breeding of soybeans.
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