The common potato, Solanum tuberosum L. (2n = 4x = 48), has 100–200 related wild taxonomic species endemic to the Americas, which constitute invaluable sources of genetic diversity. They form a polyploid series with 2n = 2x – 6x (x = 12) and can reproduce asexually by tubers and stolons and/or sexually by seeds. Information is scarce on their preponderant mode of reproduction and its consequences on the genetic population structure over time. In previous work, a morphologically variable wild potato population from northwestern Argentina was sampled in two consecutive years. Two populations were ex situ regenerated from the sampled propagules (seeds in 2013 and tubers in 2014) for morphological and reproductive studies; these populations exhibited differences in reproductive behavior that could not be related to morphological phenotypes. To ascertain if the observed differences could be related to the captured genetic diversity in each year, a molecular analysis was carried out with seven microsatellite primer pairs located in seven chromosomes of the basic set. The captured genetic diversity, based on the proportion of individuals with a unique pattern of amplified fragments, varied significantly (χ² α = .05) between sampling years. This could be due to changes in the preponderant mode of reproduction, differential genotype fitness resulting from genotype × environment interactions, or both. Wild potato accessions at germplasm banks are one-time collection samples; thus, they may not be representative of the genetic diversity of the sampled population. To properly ex situ conserve the available genetic diversity, it is advisable to resample the sites whenever possible and to conform each accession with the successive samples.

中文翻译：

---

阿根廷西北部天然野生马铃薯种群微卫星模式随时间的变化

常见的马铃薯Solanum tuberosum L. (2 n  = 4 x  = 48) 有 100-200 种美洲特有的相关野生分类物种，它们构成了宝贵的遗传多样性来源。它们形成了一个多倍体系列，其中 2 n  = 2 x – 6 x ( x = 12) 并且可以通过块茎和匍匐茎无性繁殖和/或通过种子有性繁殖。关于它们的主要繁殖方式及其对遗传种群结构随着时间的推移的影响的信息很少。在之前的工作中，连续两年对来自阿根廷西北部的形态可变的野生马铃薯种群进行了采样。从采样的繁殖体（2013 年的种子和 2014 年的块茎）中异地再生了两个种群，用于形态学和繁殖研究；这些种群表现出与形态表型无关的生殖行为差异。为了确定观察到的差异是否与每年捕获的遗传多样性有关，对位于基本组的七个染色体中的七个微卫星引物对进行了分子分析。² α = .05) 采样年份之间。这可能是由于优势繁殖模式的变化、基因型×环境相互作用导致的差异基因型适合度的变化，或两者兼而有之。种质库的野生马铃薯种质为一次性收集样品；因此，它们可能不能代表抽样种群的遗传多样性。为了适当地异地保护可用的遗传多样性，建议尽可能对地点重新取样，并使每个种质与连续样品相符。