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Mitochondrial DNA and Y ‐chromosome diversity in E ast A driatic sheep
Author(s) -
Ferencakovic M.,
Curik I.,
PérezPardal L.,
Royo L. J.,
CubricCurik V.,
Fernández I.,
Álvarez I.,
Kostelic A.,
Sprem N.,
Krapinec K.,
Goyache F.
Publication year - 2013
Publication title -
animal genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.756
H-Index - 81
eISSN - 1365-2052
pISSN - 0268-9146
DOI - 10.1111/j.1365-2052.2012.02393.x
Subject(s) - biology , mitochondrial dna , genetics , genetic diversity , chromosome , evolutionary biology , diversity (politics) , gene , population , demography , sociology , anthropology
Summary Variation in mitochondrial DNA (mt DNA ) and Y ‐chromosome haplotypes was analysed in nine domestic sheep breeds (159 rams) and 21 mouflon ( O vis musimon ) sampled in the E ast A driatic. Mitochondrial DNA analyses revealed a high frequency of type B haplotypes, predominantly in E uropean breeds, and a very low frequency of type A haplotypes, which are more frequent in some A sian breeds. M itochondrial haplotype H mt‐3 was the most frequent (26.4%), and 37.1%, 20.8% and 7.6% of rams had haplotypes one, two and three mutations remote from H mt‐3 respectively. In contrast, Y ‐chromosome analyses revealed extraordinary paternal allelic richness: HY ‐6, 89.3%; HY ‐8, 5.0%; HY ‐18, 3.1%; HY ‐7, 1.3%; and HY ‐5, 1.3%. In fact, the number of haplotypes observed is comparable to the number found in T urkish breeds and greater than the number found in European breeds so far. H aplotype HY ‐18 ( A ‐ oY 1/135‐ SRYM 18), identified here for the first time, provides a link between the haplotype HY ‐12 ( A ‐ oY 1/139‐ SRYM 18) found in a few rams in T urkey and haplotype HY ‐9 ( A ‐ oY 1/131‐ SRYM 18) found in one ram in E thiopia. All mouflons had type B mt DNA haplotypes, including the private haplotype ( H mt‐55), and all were paternally monomorphic for haplotype HY ‐6. Our data support a quite homogeneous maternal origin of E ast A driatic sheep, which is a characteristic of E uropean breeds. At the same time, the high number of haplotypes found was surprising and intriguing, and it begs for further analysis. Simultaneous analysis of mt DNA and Y ‐chromosome information allowed us to detect a large discrepancy between maternal and paternal lineages in some populations. This is most likely the result of breeder efforts to ‘upgrade’ local populations using rams with different paternal origins.