Grape (Vitis vinifera) is an important horticultural crop that can be used to make juice and wine. However, the small size of the berry limits its yield. Cultivating larger berry varieties can be an effective way to solve this problem. As the largest family of auxin early response genes, SAUR (small auxin upregulated RNA) plays an important role in the growth and development of plants. Berry size is one of the important factors that determine grape quality. However, the SAUR gene family’s function in berry size of grape has not been studied systematically. We identified 60 SAUR members in the grape genome and divided them into 12 subfamilies based on phylogenetic analysis. Subsequently, we conducted a comprehensive and systematic analysis on the SAUR gene family by analyzing distribution of key amino acid residues in the domain, structural features, conserved motifs, and protein interaction network, and combined with the heterologous expression in Arabidopsis and tomato. Finally, the member related to grape berry size in SAUR gene family were screened. This genome-wide study provides a systematic analysis of grape SAUR gene family, further understanding the potential functions of candidate genes, and provides a new idea for grape breeding.

中文翻译：

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葡萄小生长素上调 RNA (SAUR) 041 是葡萄浆果大小的候选调节剂

葡萄（Vitis vinifera）是一种重要的园艺作物，可用于制作果汁和葡萄酒。然而，浆果的小尺寸限制了它的产量。培育更大的浆果品种是解决这一问题的有效途径。作为最大的生长素早期反应基因家族，SAUR（small auxin upregulation RNA）在植物的生长发育中发挥着重要作用。浆果大小是决定葡萄品质的重要因素之一。然而，SAUR基因家族在葡萄果实大小中的功能尚未得到系统研究。我们确定了 60 SAUR葡萄基因组中的成员，并根据系统发育分析将它们分为 12 个亚科。随后，我们通过分析域内关键氨基酸残基的分布、结构特征、保守基序和蛋白质相互作用网络，并结合拟南芥和番茄中的异源表达，对SAUR基因家族进行了全面系统的分析。最后筛选出SAUR基因家族中与葡萄浆果大小相关的成员。这项全基因组研究对葡萄SAUR基因家族进行了系统分析，进一步了解了候选基因的潜在功能，为葡萄育种提供了新思路。