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The utility of genome size in plant identification: a case study on Sesleria (Poaceae) from Croatia and Slovenia
Plant Systematics and Evolution ( IF 1.9 ) Pub Date : 2020-10-13 , DOI: 10.1007/s00606-020-01715-2
Iva Hodálová , Lenka Mártonfiová , Katarína Skokanová , Monika Majerová , Lajos Somlyay , Pavol Mereďa

Members of the genus Sesleria are important vegetation elements and are regarded as diagnostic or constant species in many plant communities. However, their identification is often problematic due to their similar morphology and phenotypic plasticity. Although the genus has been studied by many specialists, numerous taxonomic problems remain unresolved. A controversial issue is the alleged presence of S. sadleriana and its hybrid with S. kalnikensis in Slovenia and NW Croatia. To resolve the situation, we used flow cytometry and determined the relative genome size in a large set of Sesleria samples, because this marker proved to be an effective tool in species identification in our previous Sesleria study. A total of 287 individuals from 24 Sesleria populations from NE Italy, Slovenia and NW Croatia were analysed in this study, and the results were compared with our previous dataset comprising 717 samples (representing 57 populations) of Sesleria species collected in other parts of Central Europe (Austria, Poland, Slovakia, Hungary, Romania). We have revealed that none of the studied populations from Slovenia or Croatia could be assigned to S. sadleriana or the hybrid S. kalnikensis × S. sadleriana. Of the 24 populations, 5 were identified as octoploid S. juncifolia, 3 as octoploid S. kalnikensis s.s., 11 as octoploid S. kalnikensis s.l., and 5 as an unknown tetraploid populations. The identity of S. kalnikensis s.l. and tetraploid populations requires further studies.

中文翻译:

基因组大小在植物鉴定中的应用:以克罗地亚和斯洛文尼亚的禾本科(禾本科)为例

Sesleria 属的成员是重要的植被元素,在许多植物群落中被视为诊断或恒定物种。然而,由于它们相似的形态和表型可塑性,它们的识别通常是有问题的。尽管许多专家对该属进行了研究,但仍有许多分类学问题尚未解决。一个有争议的问题是在斯洛文尼亚和克罗地亚西北部存在 S. sadleriana 及其与 S. kalnikensis 的杂种。为了解决这种情况,我们使用流式细胞术并确定了大量 Sesleria 样本中的相对基因组大小,因为在我们之前的 Sesleria 研究中,该标记被证明是物种鉴定的有效工具。本研究共分析了来自意大利东北部、斯洛文尼亚和克罗地亚西北部的 24 个 Sesleria 种群的 287 只个体,并将结果与​​我们之前的数据集进行了比较,该数据集包含在中欧其他地区(奥地利、波兰、斯洛伐克、匈牙利、罗马尼亚)收集的 717 个样本(代表 57 个种群)。我们已经发现,来自斯洛文尼亚或克罗地亚的研究种群中没有一个可以分配给 S. sadleriana 或 S. kalnikensis × S. sadleriana 杂交。在这 24 个种群中,5 个被鉴定为八倍体 S. juncifolia,3 个被鉴定为八倍体 S. kalnikensis ss,11 个被鉴定为八倍体 S. kalnikensis sl,5 个被鉴定为未知的四倍体种群。S. kalnikensis sl 和四倍体种群的身份需要进一步研究。我们已经发现,来自斯洛文尼亚或克罗地亚的研究种群中没有一个可以分配给 S. sadleriana 或 S. kalnikensis × S. sadleriana 杂交。在这 24 个种群中,5 个被鉴定为八倍体 S. juncifolia,3 个被鉴定为八倍体 S. kalnikensis ss,11 个被鉴定为八倍体 S. kalnikensis sl,5 个被鉴定为未知的四倍体种群。S. kalnikensis sl 和四倍体种群的身份需要进一步研究。我们已经发现,来自斯洛文尼亚或克罗地亚的研究种群中没有一个可以分配给 S. sadleriana 或 S. kalnikensis × S. sadleriana 杂交。在这 24 个种群中,5 个被鉴定为八倍体 S. juncifolia,3 个被鉴定为八倍体 S. kalnikensis ss,11 个被鉴定为八倍体 S. kalnikensis sl,5 个被鉴定为未知的四倍体种群。S. kalnikensis sl 和四倍体种群的身份需要进一步研究。
更新日期:2020-10-13
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