DOI: 10.5061/dryad.0vt4b8h4b
title: SNP genotypes from Magallanes

description: Hybrid zones among mussel species have been extensively studied in the
 northern hemisphere. In South America, it has only recently become
 possible to study the natural hybrid zones, due to the clarification of
 the taxonomy of native mussels of the Mytilus genus. Analyzing 54 SNP
 markers, we show the genetic species composition and admixture in the
 hybrid zone between M. chilensis and M. platensis in the southern end of
 South America. Bayesian, non-Bayesian clustering and re-assignment
 algorithms showed that the natural hybrid zone between M. chilensis and M.
 platensis in the Strait of Magellan, Isla Grande de Tierra del Fuego, and
 the Falkland Islands shows complex architecture. It can be divided into
 three different areas: the first one is on the Atlantic coast where only
 pure M. platensis and hybrid were found. In the second one,
 inside the Strait of Magellan, pure individuals of both species and
 mussels with variable degrees of hybridization coexist. In the last area
 at the Strait in front of Punta Arenas City, fjords on the Isla Grande de
 Tierra del Fuego, and at the Beagle Channel, only M. chilensis and a low
 number of hybrids were found.  According to the proportion of
 hybrids, bays with protected conditions away from strong currents would
 give better conditions for hybridization. We do not find evidence of any
 other mussel species such as M. edulis, M. galloprovincialis, M.
 planulatus, or M. trossulus in the zone
description: Mussels (n = 160) from ten sampling
 sites in the Strait of Magellan, the Isla Grande de Tierra del Fuego, the
 Falkland Islands, and the Beagle Channel were collected between 2016 and
 2018. The DNA was extracted from the mantle edge tissue by the
 phenol-chloroform method modified for mussels. All individuals were
 genotyped with a panel of 54 SNPs that have shown good genotyping
 performance and reproducibility using the Sequenom MassARRAY iPLEX
 genotyping platform. Individuals with a genotyping rate of less than 90%
 were excluded from further analysis.
description: # SNP Genotype data of hybrid zone between Mytilus chilensis and M.
 platensis in southern South America (the Strait of Magellan, Isla Grande
 de Tierra del Fuego, and the Falkland Islands) ### Reference samples: |
 Species | Code | Location | Country | N Individuals | |
 :------------------- | :--- | :------------------- | :---------- |
 :------------ | | M. chilensis  | CHCL | Chilo | Chile | 29 | | M. edulis 
 | IRUS | Indian River, DE | USA | 26 | | M. galloprovincialis | ORIT |
 Oristano | Italy | 29 | | M. planulatus | AKNZ | Akaroa South Island  |
 New Zealand | 30 | | M. platensis | CRAR | Comodoro Rivadavia  | Argentina
 | 35 | | M. trossulus | VNCA | Vancouver | Canada | 19 | ### Samples from
 Patagonia: | Code | Location | Country | Latitude/Longitude | N
 Individuals | | :--- | :-------------- | :------------- |
 :----------------- | :------------ | | FKUK | Falkland Island | United
 Kingdom | -51,8266/-58,9722 | 19 | | PMAR | Punta Maria | Argentina |
 -53,9469/-67,4820 | 18 | | BACL | Bahia Azul | Chile | -52,4941/-69,5220 |
 18 | | SGCL | San Gregorio | Chile | -52,5608/-70,0428 | 19 | | BICL |
 Bahia Intil | Chile | -53,4727/-69,3038 | 19 | | BLCL | Bahia Laredo |
 Chile | -52,9694/-70,8255 | 18 | | PACL | Punta Arenas | Chile |
 -53,1651/-70,9008 | 17 | | CMCL | Caleta Maria | Chile | -54,4812/-68,9934
 | 16 | | ALAR | Almanza | Argentina | -54,8689/-67,5523 | 16 |