Differential immunity as a factor influencing mussel hybrid zone structure

Tolman, Deryk; Wood, Hannah L.; Skibinski, D. O. F.; Truebano, Manuela

doi:10.1007/s00227-019-3604-3

Cited by 3 publications

(1 citation statement)

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“…In the southern hemisphere, hybridisation of invasive M. galloprovincialis with native Australian M. planulatus and extensive introgression have been reported (Popovic et al., 2020; Zbawicka et al., 2022). Notwithstanding frequent hybridisation, Mytilus taxa are considered reproductively isolated because of pre‐ and postzygotic mechanisms such as gamete incompatibility, asynchrony of spawning, assortative fertilisation, and differentiation in their tolerance to environmental factors (Bierne et al., 2002, 2006; Gardner & Skibinski, 1990; Tolman et al., 2019). The M. edulis — M. galloprovincialis hybrids in Europe, have been reported as intermediate between pure species for some traits, such as length‐age correlation (Gardner et al., 1993), habitat preference (Gosling & McGrath, 1990), attachment power (Willis & Skibinski, 1992), resistance to parasites (Coustau et al., 1991) and for immune response (Tolman et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

SNP genotyping revealed a 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)

Jilberto,

Zbawicka,

Wenne

et al. 2023

Molecular Ecology

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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. Analysing 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 clinal architecture. The hybrid zone 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 hybridisation 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 hybridisation. We do not find evidence of any other mussel species such as M. edulis, M. galloprovincialis, M. planulatus or M. trossulus in the zone.

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