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12 February 2024 Diversity of MHC class II DRB alleles in the Northern chamois genus Rupicapra
Sunčica Stipoljev, Elena Buzan, Laura Iacolina, Toni Safner, Andrea Rezić, Ana Galov, Krešimir Križanović, Hüseyin Ambarlı, MariaCruz Arnal, Elmar Babaev, Ferdinand Bego, Attila Farkas, Dragan Gačić, Peter Lazar, Vladimir Maletić, Georgi Markov, Dragana Milošević, Haritakis Papaioannou, Massimo Scandura, Nikica Šprem
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Abstract

Major histocompatibility complex (MHC) genes are commonly used markers for monitoring adaptive genetic and evolutionary potential of species. In this study, we investigated genetic variation of the MHC class II DRB locus in the chamois genus Rupicapra by using next-generation sequencing. Sequencing of 102 samples led to the identification of 25 alleles, 11 of which are novel. The high ratio of the relative rates of nonsynonymous to synonymous mutations (dN/dS) suggests a signal of positive selection on this locus. We analyzed patterns of genetic variation within and among 2 subspecies of Northern Chamois and compared them to previously published studies using neutral markers to provide a basis for assessing the effects of demographic processes. Our analyses have shown that alleles are likely to be maintained by balancing selection in different populations with similar frequencies and that this mechanism also works in small, isolated populations that are strongly affected by genetic drift.

Sunčica Stipoljev, Elena Buzan, Laura Iacolina, Toni Safner, Andrea Rezić, Ana Galov, Krešimir Križanović, Hüseyin Ambarlı, MariaCruz Arnal, Elmar Babaev, Ferdinand Bego, Attila Farkas, Dragan Gačić, Peter Lazar, Vladimir Maletić, Georgi Markov, Dragana Milošević, Haritakis Papaioannou, Massimo Scandura, and Nikica Šprem "Diversity of MHC class II DRB alleles in the Northern chamois genus Rupicapra," Journal of Mammalogy 105(2), 312-322, (12 February 2024). https://doi.org/10.1093/jmammal/gyae008
Received: 26 September 2022; Accepted: 30 January 2024; Published: 12 February 2024
KEYWORDS
allelic polymorphism
major histocompatibility complex
next-generation sequencing
Rupicapra pyrenaica
Rupicapra rupicapra
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