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首页> 外文期刊>Comparative and functional genomics >Transcriptome Comparison Reveals Distinct Selection Patterns in Domesticated and Wild Agave Species, the Important CAM Plants
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Transcriptome Comparison Reveals Distinct Selection Patterns in Domesticated and Wild Agave Species, the Important CAM Plants

机译：转录组比较揭示了重要的CAM植物驯化和野生龙舌兰物种中的不同选择模式。

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摘要

Agave species are an important family of crassulacean acid metabolism (CAM) plants with remarkable tolerance to heat and drought stresses (Agave deserti) in arid regions and multiple agricultural applications, such as spirit (Agave tequilana) and fiber (Agave sisalana) production. The agave genomes are commonly too large to sequence, which has significantly restricted our understanding to the molecular basis of stress tolerance and economic traits in agaves. In this study, we collected three transcriptome databases for comparison to reveal the phylogenic relationships and evolution patterns of the three agave species. The results indicated the close but distinctly domesticated relations between A. tequilana and A. sisalana. Natural abiotic and biotic selections are very important factors that have contributed to distinct economic traits in agave domestication together with artificial selection. Besides, a series of candidate unigenes regulating fructan, fiber, and stress response-related traits were identified in A. tequilana, A. sisalana, and A. deserti, respectively. This study represents the first transcriptome comparison within domesticated and wild agaves, which would serve as a guidance for further studies on agave evolution, environmental adaptation, and improvement of economically important traits.
机译：龙舌兰物种是一种重要的头孢类植物酸代谢（CAM）植物，在干旱地区和多种农业应用中具有出色的耐热和干旱胁迫能力（Agave deserti），例如烈酒（Agave tequilana）和纤维（Agave sisalana）的生产。龙舌兰基因组通常太大而无法测序，这极大地限制了我们对龙舌兰抗逆性和经济性状的分子基础的了解。在这项研究中，我们收集了三个转录组数据库进行比较，以揭示这三个龙舌兰物种的系统发生关系和进化模式。结果表明龙舌兰和剑麻之间的亲密关系却很明显。天然的非生物和生物选择是非常重要的因素，它们与人工选择一起在龙舌兰驯化中促成了独特的经济特征。此外，分别在龙舌兰，剑麻和沙漠中鉴定出一系列调控果聚糖，纤维和与应激反应相关性状的候选单基因。这项研究代表了驯化和野生龙舌兰的首次转录组比较，这将为进一步研究龙舌兰演变，环境适应和改善重要经济性状提供指导。

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