Pigeonpea is the main protein source for more than one billion people, and it shows a strong adaptation to biotic stress and abiotic stress. Gene duplication is a fundamental process in genome evolution. Although the draft sequence of the pigeonpea genome has been available since 2011, further analysis of tandem duplicated genes (TDGs) and their contribution to the evolution of pigeonpea has not been reported. In this study, we identify 3211 TDGs in the pigeonpea genome and KEGG enrichment analysis of these genes shows that the TDGs are significantly enriched in resistance-related pathways. In addition, we find that TDGs are more abundant in retrotransposon-related genes in pigeonpea than in the other species included in our study. These results indicate that stress resistance in pigeonpea may be ascribed to resistance-related pathways and retrotransposons originating from tandem duplications. Our study will provide an important basis for further research in pigeonpea breeding.

木豆是超过 10 亿人的主要蛋白质来源，它表现出对生物胁迫和非生物胁迫的强烈适应。基因复制是基因组进化的一个基本过程。虽然木豆基因组的草稿序列自 2011 年以来就已可用，但尚未报道对串联重复基因 (TDG) 及其对木豆进化的贡献的进一步分析。在这项研究中，我们在木豆基因组中鉴定了 3211 个 TDG，对这些基因的 KEGG 富集分析表明，TDG 在抗性相关途径中显着富集。此外，我们发现木豆中的反转录转座子相关基因中的 TDG 比我们研究中包括的其他物种更丰富。这些结果表明木豆的抗逆性可能归因于抗性相关途径和源自串联重复的反转录转座子。我们的研究将为木豆育种的进一步研究提供重要依据。