ArticleGenetica2020
Genetic evidence of hybridization between Magellanic (Sphensicus magellanicus) and Humboldt (Spheniscus humboldti) penguins in the wild.
Article in Genetica, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Genetic and evolutionary characteristics of the major histocompatibility complex class II β-chain genes of a large colony of captive king penguins (Aptenodytes patagonicus).Immunogenetics · 2026Article
- Comparative Genomics Supports Ecologically Induced Selection as a Putative Driver of Banded Penguin Diversification.Molecular biology and evolution · 2024Article
- Interspecific introgression of MHC genes in Triturus newts: Evidence from multiple contact zones.Molecular ecology · 2023Article
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The process of hybridization between closely related species plays an important role in defining the genetic integrity and overall genetic diversity of species. The distribution range of Magellanic (Spheniscus magellanicus) and Humboldt (Spheniscus humboldti) penguins is predominantly allopatric; however, the species share a region of sympatry where they may hybridize. We analyzed four types of genetic markers (including nuclear and mitochondrial markers) to assess their utility in detecting hybridization events between Magellanic and Humboldt penguins. Genetic assessment of non-introgressed reference samples allowed us to identify three types of informative markers (microsatellites, major histocompatibility complex, and mitochondrial DNA) and detect positive evidence of introgressive hybridization in the wild. Four out of six putative hybrids showed positive evidence of hybridization, revealed by the detection of Humboldt mitochondrial DNA and Magellanic species-specific alleles from nuclear markers. Bayesian Structure analysis, including samples from the sympatric region of the species in the southern Pacific Ocean, confirmed the use of nuclear markers for detecting hybridization and genetic admixture of putative hybrids, but revealed relatively low levels of genetic introgression at the population level. These findings provide insights into the role of hybridization in regions of species sympatry and its potential consequences on the levels of genetic introgression, genetic diversity, and conservation of these penguin species.
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