Pedigree analysis of Polish Arabian horses based on founder contributions

Głażewska, Iwona; Jezierski, Tadeusz

doi:10.1016/j.livprodsci.2004.08.002

Cited by 34 publications

(29 citation statements)

References 6 publications

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“…Regarding a possible different genetic origin for these coats, in order to establish a new colour in this breed, it is essential to cross a SPB horse with an outside breed with the new coat colour (and, therefore, the new gene), but recessive alleles related to some coats could be already present at a low frequency in the population. As commonly reported in other horse breeds with long or short pedigrees, a small number of individuals may have a great influence on the breed (Zechner et al, 2002;Glazewska and Jezierski, 2004). In our study, this fact could have been highlighted by coat colours such as white, chestnut or isabella, and also with the majority grey colour.…”

Section: Discussionsupporting

confidence: 51%

Pedigree estimation of the (sub) population contribution to the total gene diversity: the horse coat colour case

Bartolomé

Molina

Cervantes

et al. 2010

Animal

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A method to quantify the contribution of subpopulations to genetic diversity in the whole population was assessed using pedigree information. The standardization of between-and within-subpopulation mean coancestries was developed to account for the different coat colour subpopulation sizes in the Spanish Purebred (SPB) horse population. The data included 166 264 horses registered in the SPB Studbook. Animals born in the past 11 years (1996 to 2006) were selected as the 'reference population' and were grouped according to coat colour into eight subpopulations: grey (64 836 animals), bay (33 633), black (9414), chestnut (1243), buckskin (433), roan (107), isabella (57) and white (37). Contributions to the total genetic diversity were first assessed in the existing subpopulations and later compared with two scenarios with equal subpopulation size, one with the mean population size (13 710) and another with a low population size (100). Ancestor analysis revealed a very similar origin for the different groups, except for six ancestors that were only present in one of the groups likely to be responsible for the corresponding colour. The coancestry matrix showed a close genetic relationship between the bay and chestnut subpopulations. Before adjustment, Nei's minimum distance showed a lack of differentiation among subpopulations (particularly among the black, chestnut and bay subpopulations) except for isabella and white individuals, whereas after adjustment, white, roan and grey individuals appeared less differentiated. Standardization showed that balancing coat colours would contribute preserving the genetic diversity of the breed. The global genetic diversity increased by 12.5% when the subpopulations were size standardized, showing that a progressive increase in minority coats would be profitable for the genetic diversity of this breed. The methodology developed could be useful for the study of the genetic structure of subpopulations with unbalanced sizes and to predict their genetic importance in terms of their contribution to genetic variability.

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Section: Discussionsupporting

confidence: 51%

Pedigree estimation of the (sub) population contribution to the total gene diversity: the horse coat colour case

Bartolomé

Molina

Cervantes

et al. 2010

Animal

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“…World War I and the October Revolution resulted in the total destruction of most of the Polish studs [7]. Extensive reconstruction of Polish Arabian breeding was undertaken in the subsequent years, and mares representing the new dam lines of Rodania, Selma, and Cherifa were imported to Polish studs.…”

Section: Origin Of Polish Arabian Horses 611mentioning

confidence: 99%

“…World War II inflicted another ruinous blow to Polish breeding, during which most of the studs were destroyed, and the horses were either plundered or were missing [13,14,16]. Post-war breeding started with 59 surviving brood mares and 14 mares from the Babolna stud [7]. The representatives of four new dam lines were among Babolna's mares (Tab.…”

Section: Origin Of Polish Arabian Horses 611mentioning

confidence: 99%

A new view on dam lines in Polish Arabian horses based on mtDNA analysis

et al. 2007

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-Polish Arabian horses are one of the oldest and the most important Arab populations in the world. The Polish Arabian Stud Book and the Genealogical Charts by Skorkowski are the main sources of information on the ancestors of Polish Arabs. Both publications were viewed as credible sources of information until the 1990s when the data regarding one of the dam lines was questioned. The aim of the current study was to check the accuracy of the pedigree data of Polish dam lines using mtDNA analysis. The analyses of a 458 bp mtDNA D-loop fragment from representatives of 15 Polish Arabian dam lines revealed 14 distinct haplotypes. The results were inconsistent with pedigree data in the case of two lines. A detailed analysis of the historical sources was performed to explain these discrepancies. Our study revealed that representatives of different lines shared the same haplotypes. We also noted a genetic identity between some lines founded by Polish mares of unknown origin and lines established by desert-bred mares. mitochondrial DNA / horse / pedigree / phylogeny

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“…Cattle breeders are typically concerned about the productivity and genetic health of their livestock, both of which can potentially benefit from within-population assessments of genetic variability and population structure. Such assessments can be used to guide selection programs and genetic stock management (Glazewska & Jezierski, 2004).…”

Section: Introductionmentioning

confidence: 99%

Population Structure and Genetic Variability of Angus and Nellore Herds

Falleiro¹,

Malhado²,

Malhado³

et al. 2014

JAS

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Reproductive isolation of cattle herds should have significant negative genetic consequences, including inbreeding depression and the loss of diversity through genetic drift. Cattle herds may also suffer detrimental effects on genetic variance caused by other demographic and population parameters such as effective population size, strong selection and founder effects. In the present study we use pedigree records to evaluate these potential impacts on a closed nucleus Angus from U.S. and an open multiplier Nellore herd from Brazil. The combined description of population structure and genetic variability of these two herds indicates that it is possible to maintain genetic variability with medium levels of inbreeding in herds with strong selection and small effective population size. Additionally, the analysis illustrates the importance of pedigree depth for accurately estimating population parameters, particularly, inbreeding and effective population size.

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Pedigree analysis of Polish Arabian horses based on founder contributions

Cited by 34 publications

References 6 publications

Pedigree estimation of the (sub) population contribution to the total gene diversity: the horse coat colour case

Pedigree estimation of the (sub) population contribution to the total gene diversity: the horse coat colour case

A new view on dam lines in Polish Arabian horses based on mtDNA analysis

Population Structure and Genetic Variability of Angus and Nellore Herds

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