Raw allelic matrix and supplementary materials: Origin and dispersion pathways of guava in the Galapagos Islands inferred through genetics and historical records

Guava (Psidium guajava) is an aggressive invasive plant in the Galapagos Islands. Determining its provenance and genetic diversity could explain its adaptability and spread, and how this relates to past human activities. With this purpose, we analyzed 11 SSR markers in guava individuals from Isabela, Santa Cruz, San Cristobal and Floreana islands in the Galapagos, as well as from mainland Ecuador. The mainland guava population appeared genetically differentiated from the Galapagos populations, with higher genetic diversity levels found in the former. We consistently found that the Central Highlands region of mainland Ecuador is one of the most likely origins of the Galapagos populations. Moreover, the guavas from Isabela and Floreana show a potential genetic input from southern mainland Ecuador, while the population from San Cristobal would be linked to the coastal mainland regions. Interestingly, the proposed origins for the Galapagos guava coincide with the first human settlings of th...番石榴（Psidium guajava）是加拉帕戈斯群岛上入侵性极强的外来植物。明确其起源与遗传多样性，有助于解析其适应性与扩散机制，以及该过程与过往人类活动的关联。基于此研究目标，我们对加拉帕戈斯群岛伊莎贝拉岛、圣克鲁斯岛、圣克里斯托瓦尔岛、弗洛雷亚纳岛以及厄瓜多尔本土的番石榴个体开展了11个简单序列重复（Simple Sequence Repeat，SSR）标记分析。结果显示，厄瓜多尔本土番石榴种群与加拉帕戈斯群岛种群存在遗传分化，且前者的遗传多样性水平更高。研究一致表明，厄瓜多尔本土中部高地是加拉帕戈斯群岛番石榴种群最可能的起源地之一。此外，伊莎贝拉岛与弗洛雷亚纳岛的番石榴显示出源自厄瓜多尔南部本土的遗传基因渗入迹象，而圣克里斯托瓦尔岛的种群则与厄瓜多尔沿海本土区域存在关联。值得注意的是，本次研究提出的加拉帕戈斯番石榴起源地，与人类首次在该区域定居的……