Version 1
: Received: 29 February 2024 / Approved: 4 March 2024 / Online: 4 March 2024 (11:15:36 CET)
How to cite:
Saavedra, C.; Cordero, D. Genetic Variability and Genetic Differentiation of Populations in the Carpet Shell Clam (Ruditapes decussatus) Based on Intron Polymorphisms. Preprints2024, 2024030150. https://doi.org/10.20944/preprints202403.0150.v1
Saavedra, C.; Cordero, D. Genetic Variability and Genetic Differentiation of Populations in the Carpet Shell Clam (Ruditapes decussatus) Based on Intron Polymorphisms. Preprints 2024, 2024030150. https://doi.org/10.20944/preprints202403.0150.v1
Saavedra, C.; Cordero, D. Genetic Variability and Genetic Differentiation of Populations in the Carpet Shell Clam (Ruditapes decussatus) Based on Intron Polymorphisms. Preprints2024, 2024030150. https://doi.org/10.20944/preprints202403.0150.v1
APA Style
Saavedra, C., & Cordero, D. (2024). Genetic Variability and Genetic Differentiation of Populations in the Carpet Shell Clam (<em>Ruditapes decussatus</em>) Based on Intron Polymorphisms. Preprints. https://doi.org/10.20944/preprints202403.0150.v1
Chicago/Turabian Style
Saavedra, C. and David Cordero. 2024 "Genetic Variability and Genetic Differentiation of Populations in the Carpet Shell Clam (<em>Ruditapes decussatus</em>) Based on Intron Polymorphisms" Preprints. https://doi.org/10.20944/preprints202403.0150.v1
Abstract
The grooved carpet-shell clam is one of the most economically relevant shellfish species living in the Mediterranean and nearby Atlantic coasts. Previous studies using different types of genetic markers showed a remarkable genetic divergence of the Eastern Mediterranean, Western Mediterranean and Atlantic populations, but important details remained unclear. Here, data from six nuclear introns scored for restriction fragment size polymorphisms in eight populations that have not been studied before have been pooled for the analysis with data scattered through three previous studies, totaling 32 samples from 29 locations. The results show lower levels of heterozygosity, higher mean number of alleles, and alleles with restricted distribution in the Mediterranean populations, suggesting the existence of a large isolated population in the eastern Mediterranean at the middle Pleistocene. The data also confirm the similarity of populations from Tunisia to western Mediterranean populations. Finally, a genetic mosaic is apparent in the Atlantic coasts of the Iberian Peninsula, with a divergence of Rias Baixas populations from more northern populations and Central Portugal populations. The effects of oceanic fronts, seasonal upwellings, river plumes and/or fishery management operations could explain this and other features of the Atlantic populations.
Keywords
clam; fisheries; population genetics; intron; RFLP
Subject
Biology and Life Sciences, Aquatic Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
