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Fine-scale population genetic structure of sugar kelp, Saccharina latissima (Laminariales, Phaeophyceae), in eastern Maine, USA
Phycologia ( IF 1.6 ) Pub Date : 2018-01-01 , DOI: 10.2216/17-72.1
Timothy S Breton 1 , Jeremy C Nettleton 2 , Brennah O'Connell 1 , Margaret Bertocci 1
Affiliation  

Abstract: There is an interest to develop sugar kelp (Saccharina latissima) cultivation in the rural, eastern Maine region of the United States. Future farming efforts would benefit from an understanding of the genetic diversity and population structure of kelp to inform management and conservation, and to identify genetic resources. The purpose of the present study was to characterize the fine-scale population genetic structure of kelp in eastern Maine using 12 microsatellite loci. A total of 188 samples were genotyped from five sampling locations. Overall, kelp exhibited relatively low genetic diversity and small but significant differentiation among populations (FST = 0.0157). The greatest genetic difference was detected between two geographically close populations in Penobscot and Frenchman Bays, which is likely due to patterns in the Eastern Maine Coastal Current that may limit meiospore recruitment. The population structure could not be fully explained by an isolation-by-distance model. Fine-scale structuring was also detected among populations along the more continuous eastern Maine coastline. These differences highlight that sugar kelp populations are finely structured across small spatial scales, and that future management and farming efforts should aim to maintain genetic diversity and assess the culture potential of local populations.

中文翻译:

美国缅因州东部糖海带(Laminariales,Phaeophyceae)的精细种群遗传结构

摘要:在美国缅因州东部的农村地区发展糖海带 (Saccharina latissima) 种植有兴趣。未来的农业努力将受益于对海带遗传多样性和种群结构的了解,从而为管理和保护提供信息,并确定遗传资源。本研究的目的是使用 12 个微卫星位点表征缅因州东部海带的精细种群遗传结构。对来自五个采样位置的总共 188 个样本进行了基因分型。总体而言,海带表现出相对较低的遗传多样性和种群间小而显着的分化(FST = 0.0157)。在 Penobscot 和 Frenchman Bays 的两个地理上接近的种群之间检测到最大的遗传差异,这可能是由于缅因州东部沿海流的模式可能会限制小孢子的补充。距离隔离模型无法完全解释人口结构。沿着更连续的缅因州东部海岸线的种群中也发现了精细尺度的结构。这些差异凸显了糖海带种群在小空间尺度上的精细结构,未来的管理和耕作努力应旨在保持遗传多样性并评估当地种群的文化潜力。
更新日期:2018-01-01
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