Genotype data for wild lupin populations from central Michigan

Habitat degradation can have significant effects on native species inhabiting natural ecosystems. Within oak barrens and oak-pine barrens ecosystems, there is a complex interspecies interaction between the federally endangered Karner blue butterfly (Lycaeides melissa samuelis) and its obligate host plant, wild lupine (Lupinus perennis L.). Recruitment of wild lupine is critical for maintaining butterfly populations; however, this recruitment can be impeded by habitat fragmentation. Reduced recruitment can result in low genetic diversity in isolated populations, limiting its adaptive potential to respond to environmental change. This study was aimed at understanding the genetic diversity and population structure of wild lupine populations throughout central and west Michigan. We identified significant population structure across most of the populations sampled, with only two sites not significantly different from each other. No sites within our study area displayed statistically significant levels of inbreeding. There are also at least two genetic clusters of wild lupine present within our study region, although there is significant overlap among these groups, indicating that genetic differentiation among clusters may be limited.

生境退化对栖息于自然生态系统中的本土物种可产生显著影响。在栎稀树灌丛与栎-松稀树灌丛生态系统中，联邦列级濒危的卡纳蓝蝶（Karner blue butterfly，学名Lycaeides melissa samuelis）与其专性寄主植物野羽扇豆（wild lupine，学名Lupinus perennis L.）之间存在复杂的种间互作关系。野羽扇豆的种群补充对于维持卡纳蓝蝶种群至关重要，但生境破碎化会阻碍这一补充过程。种群补充不足会导致隔离种群的遗传多样性降低，限制其应对环境变化的适应潜能。本研究旨在探明密歇根州中部与西部地区野羽扇豆种群的遗传多样性及种群结构。我们在绝大多数采样种群中均检测到显著的种群结构，仅两个采样点间未呈现显著差异。研究区域内未发现任何采样点存在统计学意义上显著的近交水平。本研究区域内至少存在两个野羽扇豆遗传聚类群，尽管这些类群间存在显著的遗传重叠，暗示聚类群间的遗传分化可能较为有限。