Genetic diversity and population structure of Polish Arabian horses assessed through breeding and microsatellite data

Głażewska, Iwona; Gralak, B.; Naczk, Aleksandra M.; Prusak, B.

doi:10.1111/asj.12983

Cited by 5 publications

(14 citation statements)

References 22 publications

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“…In the last period, the alleles identified were six, but two were private and rare (HTG7/P 0.08% and HTG7/Q 0.05%), a consequence of the introduction of two mares ( Table S6 ). HTG7/L identified since the first period (3.7%) decreased to the last period, where it was missing, similarly to what was described by Glazewska et al, 2018 [ 32 ] in Polish Arabian horses because of breeding selection.…”

Section: Discussionsupporting

confidence: 81%

Genetic Variability Trend of Lusitano Horse Breed Reared in Italy

Cozzi

Valiati

Longeri

et al. 2022

Animals

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The Lusitano Horse (LH) originates from Portugal, but is reared worldwide. Since 1994, the University of Milan has routinely tested the LHs bred in Italy for parentage control. This study aims to assess the genetic variability of the LH reared in Italy using 16 microsatellites markers. Moreover, the genetic variability changes over the years in the total population (n.384) and in unrelated horses (n.47) were evaluated. Horses were grouped according to their date of birth (1975–1990, 1991–2000, 2001–2010, 2010–2019). Standard genetic diversity parameters, including observed (Ho) and expected (He) heterozygosity, Hardy-Weinberg equilibrium (HWE; P-Val), allelic richness, and inbreeding coefficient (Fis) were estimated. In the whole period, the total population showed Ho as high as 0.69, low Fis (0.057), and imbalance for HWE. When considering the unrelated horses, Ho was seen to increase over time (from 0.594 in 1975–1990 to 0.68 in 2010–2019) and frequencies were in HWE, again having low and decreasing values of Fis (from 0.208 in 1975–1990 to 0.019 in 2010–2019). Bottleneck analysis excluded a recent population decline. Principal Coordinate Analysis at the individual level defined two clusters, the major cluster including all the most recent horses. An increasing number of dams (156% more from 2001–2010 to 2011–2019) supports the good variability recorded in the population so far. However, the high number of foals (77.2%) sired by only four stallions in recent years suggests caution in the choice of the sires for the future.

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Section: Discussionsupporting

confidence: 81%

Genetic Variability Trend of Lusitano Horse Breed Reared in Italy

Cozzi

Valiati

Longeri

et al. 2022

Animals

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“…Due to the lack of recombination and its uniparental inheritance, mitochondrial DNA (mtDNA) is extensively used to genetically distinguish one dam line from another and to trace ancestry through the maternal lineage of a pedigree. Głażewska et al [11] have demonstrated the usefulness of pedigree data in genetic diversity studies, allowing a focused animal sampling and rare haplotypes identification. On the other hand, many scholars verified the reliability of the maternal lineages recorded in the Studbooks through mitochondrial diversity surveys [10,[12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Mitochondrial DNA Survey Reveals the Lack of Accuracy in Maremmano Horse Studbook Records

Giontella

Cardinali

Lancioni

et al. 2020

Animals

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The Maremmano horse is considered one of the most important Italian warmblood breeds which originated from an ancient population. In 1980, the National Association of Maremmano Breeders established the first Studbook that recorded 440 dams and four sire founders. In this study, we selected the most significant maternal lines in terms of offspring (for a total of 74 lineages and 92 Maremmano horses) and analyzed their mitochondrial DNA control regions. We found a high variability, reflecting the importance of this local breed as a genetic resource to be preserved. Through multiple sampling, we then verified the pedigree information for 12 dam lines by matching genealogical data with mitochondrial haplotypes. A complete concordance was demonstrated in nine lineages, while for the other we highlighted a different number of haplotypes for each line (three in Fiorella, two in Nizza I, and two in Pomposina), thus suggesting that the information recorded in the Studbook could be wrong and the samples do not descend from the same maternal founder. Our combined analysis provides the opportunity to confirm the ancestry of animals and could be employed to prevent errors in pedigree data also for other breeds and species.

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“…Eleven microsatellite markers (AHT4, ASB2, HMS2, HMS3, HMS6, HMS7, HTG4, HTG6, HTG7, HTG10, VHL20) were included, i.e. the same set as in our previous publication (Głażewska et al, 2018). Currently, a greater number of markers is used in parentage control than was used initially.…”

Section: Microsatellite Analysismentioning

confidence: 99%

“…The present study is a continuation of our previous work (Głażewska et al, 2018) on the genetic diversity of state and private Polish Arabian horses used in breeding between 1996 and 2012 which was examined with breeding and microsatellite data. The goal of that study was to evaluate the genetic diversity of the population under the new breeding policy in Poland after 1989 which encouraged the development of private breeding and enabled significant imports of breeding material from other countries.…”

mentioning

confidence: 96%

“…The Polish Arabian horse population is a valuable subject of scientific study not only because of its significance to the global Arabian horse industry but also because of its pedigrees dating back to the early nineteenth century, the small magnitude of breeding, with broodmares numbering only in the hundreds, and the closed nature of the population as a result of the state monopoly and the limitation of import of horses from abroad from 1947 to 1989. Consequently, Polish Arabians have been the subject of many studies, including those on the genetic diversity of the population performed based on pedigree data (Głażewska and Jezierski, 2004) or genetic markers such as blood proteins (Kaminski and Tomaszewska-Guszkiewicz, 1978;Żurkowski et al, 1992, 1993, 1998, mtDNA (Bowling et al, 2000;Głażewska et al, 2007;, microsatellites (Gralak et al, 1998;Głażewska et al, 2018;Mahmoum et al, 2020), Y chromosome genes (Wallner et al, 2013;Felkel et al, 2019) and SNPs (Cosgrove et al, 2020).…”

mentioning

confidence: 99%

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Differences and changes: an evaluation of the genetic diversity of Arabian mares from Polish state studs born between 1996 and 2013

Głażewska

Gralak

Naczk

2022

Annals of Animal Science

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The goal of our study was to estimate genetic diversity of Arabian horses from Polish state studs which could have changed due to the extensive use of foreign sires in Polish breeding after 1989. The analysis focused on 1,388 Arabian mares born from 1996 to 2013 in the Białka, Janów Podlaski and Michałów studs. Basic parameters of pedigree, mitochondrial DNA and microsatellite analyses were considered in the study. In the pedigree analysis, changes in the gene pool over the years were noted through the considerable increase of contribution of new founders’ genes and the considerable decrease of inbreeding level. The microsatellite analysis confirmed progressive changes in the gene pool but, contrary to expectations, only three new microsatellite alleles were detected, and a decreased level of heterozygosity was observed. In turn, mtDNA analysis showed a stable genetic situation in the studs throughout the period analysed. The results of the analyses present a diverse picture of the population, which is clearly divided into the three subpopulations of Białka, Janów Podlaski and Michałów, although the pictures presented differed depending on the analytical methods used. Genetic differences among the studs should be considered a positive feature of the Polish population. In order to preserve the present level of population genetic diversity, changes in breeding policy are needed that aim to stop the loss of genes of the historical ancestors of Polish Arabian horses.

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Genetic diversity and population structure of Polish Arabian horses assessed through breeding and microsatellite data

Cited by 5 publications

References 22 publications

Genetic Variability Trend of Lusitano Horse Breed Reared in Italy

Genetic Variability Trend of Lusitano Horse Breed Reared in Italy

Mitochondrial DNA Survey Reveals the Lack of Accuracy in Maremmano Horse Studbook Records

Differences and changes: an evaluation of the genetic diversity of Arabian mares from Polish state studs born between 1996 and 2013

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