scholarly journals Spatial gradients of introgressed ancestry reveal cryptic connectivity patterns in a high gene flow marine fish

2020 ◽  
Vol 29 (20) ◽  
pp. 3857-3871
Author(s):  
Tony Robinet ◽  
Valérie Roussel ◽  
Karine Cheze ◽  
Pierre‐Alexandre Gagnaire
Keyword(s):  
Gene Flow ◽  
Marine Fish ◽  
Spatial Gradients ◽  
High Gene Flow ◽  
Connectivity Patterns ◽  
High Gene

scholarly journals Population Structure and Adaptive Divergence in a High Gene Flow Marine Fish: The Small Yellow Croaker (Larimichthys polyactis)

PLoS ONE ◽  
2016 ◽  
Vol 11 (4) ◽  
pp. e0154020 ◽  
Author(s):  
Bing-Jian Liu ◽  
Bai-Dong Zhang ◽  
Dong-Xiu Xue ◽  
Tian-Xiang Gao ◽  
Jin-Xian Liu
Keyword(s):  
Population Structure ◽  
Gene Flow ◽  
Marine Fish ◽  
Adaptive Divergence ◽  
Larimichthys Polyactis ◽  
Small Yellow Croaker ◽  
High Gene Flow ◽  
High Gene

scholarly journals RAD genotyping reveals fine-scale population structure and provides evidence for adaptive divergence in a commercially important fish from the northwestern Pacific Ocean

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7242 ◽  
Author(s):  
Bai-Dong Zhang ◽  
Dong-Xiu Xue ◽  
Yu-Long Li ◽  
Jin-Xian Liu
Keyword(s):  
Population Structure ◽  
Gene Flow ◽  
Local Adaptation ◽  
Marine Fish ◽  
Yellow Sea ◽  
Adaptive Divergence ◽  
High Gene Flow ◽  
High Gene ◽  
Commercially Important ◽  
Important Fish

Exploring factors shaping genetic structure of marine fish is challenging due to fewer barriers to gene flow in the ocean. However, genome-wide sequence data can greatly enhance our ability to delineate previously unidentified population structure as well as potential adaptive divergence. The small yellow croaker (Larimichthys polyactis) is a commercially important fish species with high gene flow and its overwintering populations experience heterogeneous environment, suggesting possible population differentiation and adaptive divergence. To delineate patterns of population structure as well as test for signatures of local adaptation, a total of 68,666 quality filtered SNP markers were identified for 80 individuals from four overwintering populations by using restriction site-associated DNA sequencing (RAD-seq). Significant genetic differentiation among overwintering populations from the Central Yellow Sea, the South Yellow Sea and the North East China Sea were detected (Pair-wise FST: 0.00036–0.00390), which were consistent with population division of overwintering groups inferred from traditional ecological approaches. In addition, a total of 126 unique SNPs were detected to be significantly associated with environmental parameters (temperature, salinity and turbidity). These candidate SNPs were involved in multiple pathways such as energy metabolism and phagocytosis, suggesting they may play key roles in growth and innate immunity. Our results suggested the existence of hitherto unrecognized cryptic population structure and local adaptation in this high gene flow marine fish and thus gain new insights into the design of management strategies.

scholarly journals Standing genetic variation and chromosomal rearrangements facilitate local adaptation in a marine fish

2019 ◽  
Author(s):  
Hugo Cayuela ◽  
Quentin Rougemont ◽  
Martin Laporte ◽  
Claire Mérot ◽  
Eric Normandeau ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Gene Flow ◽  
Local Adaptation ◽  
Marine Fish ◽  
Environmental Conditions ◽  
Chromosomal Rearrangements ◽  
Northwest Atlantic ◽  
High Gene Flow ◽  
High Gene ◽  
Spawning Sites

AbstractPopulation genetic theory states that adaptation most frequently occurs from standing genetic variation, which results from the interplay between different evolutionary processes including mutation, chromosomal rearrangements, drift, gene flow and selection. To date, empirical work focusing on the contribution of standing genetic variation to local adaptation in the presence of high gene flow has been limited to a restricted number of study systems. Marine organisms are excellent biological models to address this issue since many species have to cope with variable environmental conditions acting as selective agents despite high dispersal abilities. In this study, we examined how, demographic history, standing genetic variation linked to chromosomal rearrangements and shared polymorphism among glacial lineages contribute to local adaptation to environmental conditions in the marine fish, the capelin (Mallotus villosus). We used a comprehensive dataset of genome-wide single nucleotide polymorphisms (25,904 filtered SNPs) genotyped in 1,359 individuals collected from 31 spawning sites in the northwest Atlantic (North America and Greenland waters). First, we reconstructed the history of divergence among three glacial lineages and showed that they diverged from 3.8 to 1.8 MyA. Depending on the pair of lineages considered, historical demographic modelling provided evidence for divergence with gene flow and secondary contacts, shaped by barriers to gene flow and linked selection. We next identified candidate loci associated with reproductive isolation of these lineages. Given the absence of physical or geographic barriers, we thus propose that these lineages may represent three cryptic species of capelin. Within each of these, our analyses provided evidence for large Ne and high gene flow at both historical and contemporary time scales among spawning sites. Furthermore, we detected a polymorphic chromosomal rearrangement leading to the coexistence of three haplogroups within the Northwest Atlantic lineage, but absent in the other two clades. Genotype-environment associations revealed molecular signatures of local adaptation to environmental conditions prevailing at spawning sites. Altogether, our study shows that standing genetic variation associated with both chromosomal rearrangements and ancestral polymorphism contribute to local adaptation in the presence of high gene flow.

Environmental selection on transcriptome-derived SNPs in a high gene flow marine fish, the Atlantic herring (Clupea harengus)

2012 ◽  
Vol 21 (15) ◽  
pp. 3686-3703 ◽  
Author(s):  
MORTEN T. LIMBORG ◽  
SARAH J. HELYAR ◽  
MARK De BRUYN ◽  
MARTIN I. TAYLOR ◽  
EINAR E. NIELSEN ◽  
...  
Keyword(s):  
Gene Flow ◽  
Marine Fish ◽  
Clupea Harengus ◽  
Atlantic Herring ◽  
Environmental Selection ◽  
High Gene Flow ◽  
High Gene

High gene flow through pollen partially compensates spatial limited gene flow by seeds for a Neotropical tree in forest conservation and restoration areas

2021 ◽  
Author(s):  
Patricia Sanae Sujii ◽  
Evandro Vagner Tambarussi ◽  
Carolina Grando ◽  
Ellida de Aguiar Silvestre ◽  
João Paulo Gomes Viana ◽  
...  
Keyword(s):  
Gene Flow ◽  
Forest Conservation ◽  
Neotropical Tree ◽  
High Gene Flow ◽  
High Gene ◽  
Limited Gene Flow ◽  
Flow Through

Remnant populations of the regal fritillary (Speyeria idalia) in Pennsylvania: Local genetic structure in a high gene flow species

2006 ◽  
Vol 7 (2) ◽  
pp. 309-313 ◽  
Author(s):  
Nusha Keyghobadi ◽  
Katherine P. Unger ◽  
Jason D. Weintraub ◽  
Dina M. Fonseca
Keyword(s):  
Gene Flow ◽  
Genetic Structure ◽  
High Gene Flow ◽  
High Gene ◽  
Speyeria Idalia

Population genomics reveals high gene flow in grass rockfish ( Sebastes rastrelliger )

2017 ◽  
Vol 33 ◽  
pp. 57-63 ◽  
Author(s):  
Edith Martinez ◽  
Vincent Buonaccorsi ◽  
John R. Hyde ◽  
Andres Aguilar
Keyword(s):  
Gene Flow ◽  
Population Genomics ◽  
High Gene Flow ◽  
High Gene
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