Unexpected high frequency of the stress-susceptibility conferring RYR1 T allele in a city forest wild boar population
Journal Title: Animal Science Papers and Reports - Year 2016, Vol 34, Issue 4
Abstract
An opinion prevails, although supported by only a few reports that the RYR1 T (skeletal muscle ryanodine receptor) point gene mutation (C>T transition) linked to stress-sensitivity rarely occurs in the wild boar (Sus scrofa scrofa) – ancestor of the domestic swine. Consequently, the wild boar has been considered genetically resistant to stress. The present study determined the frequency of the RYR1 C>T mutation in a population of wild boars inhabiting the Gdańsk city forest (Poland). Blood samples from the hunted boars were analysed for the evidence of the RYR1 T allele. Among the 29 genotyped animals, there were 19 (65%) stress-sensitive recessive homozygotes (TT), 8 (28%) stress-resistant heterozygotes (CT) and only 2 (7%) stress-resistant dominant homozygotes (CC) with both alleles intact. Thus, contrary to the reported observations, it would appear that the wild boar population of the Gdańsk forest contains predominantly animals with at least one RYR1 T allele (frequency q = 0.79). The finding is a striking example of potentially detrimental, invisible, bottleneck effect in a relatively robust population of wild animals.
Authors and Affiliations
Andrzej Borman, Wojciech Stojek, Anna Kwaczyńska, Robert Schultka, Emilia Leszkowicz, Marian Kamyczek, Ziemowit Ciepielewski, Grzegorz Kłoss, Juliusz Tokarski, Artur H. Świergiel
Keywords
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