Whole-Genome Resequencing Identifies SNPs in Sucrose Synthase and Sugar Transporter Genes Associated with Sweetness in Coconut

文献类型： 外文期刊

第一作者： Khongmaluan, Manlika

作者： Khongmaluan, Manlika;Arikit, Siwaret;Aesomnuk, Wanchana;Dumhai, Reajina;Arikit, Siwaret;Pitaloka, Mutiara K.;Xiao, Yong;Xia, Rui;Kraithong, Tippaya;Phonsatta, Natthaporn;Panya, Atikorn;Ruanjaichon, Vinitchan;Wanchana, Samart

作者机构：

关键词： coconut; sweetness; sucrose metabolism; sucrose synthase; sugar transporter; allele mining; whole-genome resequencing

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 18 期

页码：

收录情况： SCI

摘要： Coconut (Cocos nucifera L.) is an important agricultural commodity with substantial economic and nutritional value, widely used for various products, including coconut water. The sweetness is an important quality trait of coconut water, which is influenced by genetic and environmental factors. In this study, we utilized next-generation sequencing to identify genetic variations in the coconut genome associated with the sweetness of coconut water. Whole-genome resequencing of 49 coconut accessions, including diverse germplasm and an F-2 population of 81 individuals, revealed similar to 27 M SNPs and similar to 1.5 M InDels. Sugar content measured by degrees Bx was highly variable across all accessions tested, with dwarf varieties generally sweeter. A comprehensive analysis of the sugar profiles revealed that sucrose was the major sugar contributing to sweetness. Allele mining of the 148 genes involved in sugar metabolism and transport and genotype-phenotype association tests revealed two significant SNPs in the hexose carrier protein (Cnu01G018720) and sucrose synthase (Cnu09G011120) genes associated with the higher sugar content in both the germplasm and F-2 populations. This research provides valuable insights into the genetic basis of coconut sweetness and offers molecular markers for breeding programs aimed at improving coconut water quality. The identified variants can improve the selection process in breeding high-quality sweet coconut varieties and thus support the economic sustainability of coconut cultivation.

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