Phytogeographic regions and geographic distance do not predict genetic structure in the orchid bee <i>Euglossa cordata</i>

Herein, we investigated the genetic diversity and population structure of <i>Euglossa cordata</i> L., an orchid bee species widely distributed at the heterogeneous set of vegetal physiognomies encompassed in a transition zone (TZ) of different Brazilian biomes. We then tested whether phytogeographic regions would play some rule for the genetic diversity. Results revealed that only 12 and 28 out 78 pairs of samples showed some degree of genetic structure for microsatellites (<i>F</i>_ST≤ 0.029; <i>D_est</i>≤0.091; p ST≤ 0.495; p E. cordata may have experienced some local bottlenecks despite its resilience to anthropic interferences. These are the first records of relatively high genetic structure in <i>E. cordata</i> populations and have important implications for orchid bees’ conservation.本研究针对心尾兰蜂（Euglossa cordata）开展遗传多样性与种群结构分析，该兰蜂物种广泛分布于巴西不同生物群系过渡带（transition zone, TZ）内的异质植被型生境中。随后我们检验了植物地理区域是否对其遗传多样性发挥一定调控作用。结果显示，78对样本中仅12对与28对样本在微卫星（microsatellites）分子标记下呈现一定程度的遗传结构分化（Fₛₜ≤0.029；Dₑₛₜ≤0.091；pₛₜ≤0.495）；尽管该物种对人为干扰具备一定抗逆性，但心尾兰蜂可能已经历局部种群瓶颈事件。本研究首次报道了心尾兰蜂种群存在相对显著的遗传分化现象，其结果对兰蜂的保护工作具有重要指导意义。

搜集汇总

背景与挑战

背景概述

该数据集研究了兰花蜂Euglossa cordata在巴西过渡区的遗传多样性和种群结构，发现植物地理区域和地理距离不能预测其遗传结构，而是由局部特性和历史因素驱动。研究还指出该物种可能经历了局部瓶颈，但对外界干扰具有韧性，这对兰花蜂的保护具有重要意义。