NDLI: Population Genetics of Sugar Kelp Throughout the Northeastern United States Using Genome-Wide Markers

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Author	Xiaowei Mao Simona Augyte Mao Huang Matthew P. Hare David Bailey Schery Umanzor Michael Marty-Rivera Kelly R. Robbins Charles Yarish Scott Lindell Jean-Luc Jannink
Abstract	An assessment of genetic diversity of marine populations is critical not only for the understanding and preserving natural biodiversity but also for its commercial potential. As commercial demand rises for marine resources, it is critical to generate baseline information for monitoring wild populations. Furthermore, anthropogenic stressors on the coastal environment, such as warming sea temperatures and overharvesting of wild populations, are leading to the destruction of keystone marine species such as kelps. In this study, we conducted a fine-scale genetic analysis using genome-wide high-density markers on Northwest Atlantic sugar kelp. The population structure for a total of 149 samples from the Gulf of Maine (GOM) and Southern New England (SNE) was investigated using AMOVA, FST, admixture, and PCoA. Genome-wide association analyses were conducted for six morphological traits, and the extended Lewontin and Krakauer (FLK) test was used to detect selection signatures. Our results indicate that the GOM region is more heterogeneous than SNE. These two regions have large genetic difference (between-location FST ranged from 0.21 to 0.32) and were separated by Cape Cod, which is known to be the biogeographic barrier for other taxa. We detected one significant SNP (P = 2.03 × 10–7) associated with stipe length, and 248 SNPs with higher-than-neutral differentiation. The findings of this study provide baseline knowledge on sugar kelp population genetics for future monitoring, managing and potentially restoring wild populations, as well as assisting in selective breeding to improve desirable traits for future commercialization opportunities.
e-ISSN	22967745
DOI	10.3389/fmars.2020.00694
Journal	Frontiers in Marine Science
Volume Number	7
Language	English
Publisher	Frontiers Media S.A.
Publisher Date	2020-01-01
Publisher Place	Switzerland
Access Restriction	Open
Subject Keyword	Science General. Including Nature Conservation, Geographical Distribution Saccharina Latissima Population Structure Genome-wide Analysis Cultivation Northeastern United States
Content Type	Text
Resource Type	Article

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