Classification of Heterotic Groups and Prediction of Heterosis in Sorghum Based on Whole-Genome Resequencing

文献类型： 外文期刊

第一作者： Zhang, Hongyou

作者： Zhang, Hongyou;Zhang, Yu;Wang, Wei;Zhao, Renjie;Lu, Pengfei;Zhou, Ziyang;Zhang, Hongyou;Wang, Wei;Zhao, Wenjing;Lyu, Dexin;Lu, Shan

作者机构：

关键词： sorghum; whole-genome resequencing; heterotic groups; SNP markers; combining ability; heterosis prediction

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）

ISSN： 1661-6596

年卷期： 2025 年 26 卷 16 期

页码：

收录情况： SCI

摘要： Sorghum is a crucial food crop, and utilizing heterosis is significant for yield enhancement. To classify heterotic groups in sorghum, 96 inbred lines (48 male sterile lines and 48 restoring lines) were previously analyzed using whole-genome resequencing (WGRS) technology, from which 9691 high-quality SNP markers were obtained. In this study, the materials were divided into two groups-Group I (36 lines; predominantly restoring lines) and Group II (60 lines; mainly male sterile lines)-according to their genetic distances, and 8 lines were selected from each group for incomplete diallel crosses, producing 64 hybrid combinations for analyzing ten agronomic traits and their relationship with heterosis and combining ability. Heterosis analysis revealed that yield-related traits (plant weight, grain yield, and single-spike grain weight) exhibited the strongest heterosis, followed by morphological and developmental traits. The general combining-ability variance exceeded the specific combining-ability variance for traits controlled by additive gene effects. The results demonstrate that WGRS technology effectively classifies heterotic groups in sorghum, providing scientific support for parent selection in hybrid breeding. While combining-ability analysis offers higher predictability for heterosis than molecular genetic distance, genetic distance remains valuable for predicting heterosis.

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