Potatoes is often considered a drought-sensitive crop and its sustainable production is threatened due to frequent drought episodes. Drought tolerance is a complex trait of increasing importance in potatoes therefore its yield is threatened. The differential response of several physiological and agronomical traits was evaluated in a diverse potatoes panel under contrasting water regimes to identify quantitative trait loci (QTL) associated with drought tolerance using genome-wide association analysis with 4859 high-quality SNP markers. Phenotypic data were collected from multiple environments and years. QTL with diverse linkage disequilibrium blocks for proline concentration, water consumption and yield were detected on chromosomes 1, 4 and 10. These QTL detected were associated with known gene functions. The current study provides insights into the putative genes that controlled the responses to the drought tolerance in potatoes at physiological and agronomical levels. The QTL described in this work might be included in future marker-assisted selection programmes linked with drought tolerance in potatoes.

中文翻译：

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与不同马铃薯（Solanum tuberosum）面板耐旱性相关的农艺和生理性状的全基因组关联分析

马铃薯通常被认为是对干旱敏感的作物，由于频繁的干旱事件，其可持续生产受到威胁。耐旱性是马铃薯中日益重要的复杂性状，因此其产量受到威胁。几种生理和农艺性状的差异反应在不同的马铃薯组中在对比水情下进行评估，以使用全基因组关联分析和 4859 个高质量 SNP 标记识别与耐旱性相关的数量性状位点 (QTL)。从多个环境和年份收集表型数据。在第 1、4 和 10 号染色体上检测到具有不同的脯氨酸浓度、水消耗和产量连锁不平衡块的 QTL。这些检测到的 QTL 与已知的基因功能相关。目前的研究提供了对在生理和农艺水平上控制马铃薯耐旱性反应的假定基因的见解。这项工作中描述的 QTL 可能包含在未来与马铃薯耐旱性相关的标记辅助选择程序中。