Genetic diversity in Czech Haflinger horses

Vostrý, L.; Vostrá-Vydrová, Hana; Hofmanová, B.; Veselá, Zdenka; Majzlík, I.

doi:10.18047/poljo.21.1.sup.38

Cited by 5 publications

(6 citation statements)

References 8 publications

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“…The F IS is negative for most loci, and this confirms the low level of inbreeding among the animals selected from the six paternal lineages and random mating within Polish Konik horses. The F IS value is similar to those reported for Thoroughbred [19] or Czech Haflinger horses [20] and could be interpreted as no heterozygosity reduction in the population.…”

Section: Discussionsupporting

confidence: 85%

“…Microsatellite markers are commonly used in structure and genetic diversity analyses (within-population and between populations) [1,[19][20][21][22][23][24]. The genetic diversity and population structure of Polish Konik paternal lineages, studied via microsatellite markers (STRs), could give information about variability; the results could be compared with those of other horse breeds and could be a tool to monitor the breed.…”

Section: Introductionmentioning

confidence: 99%

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Genetic Diversity and Population Structure of Polish Konik Horse Based on Individuals from All the Male Founder Lines and Microsatellite Markers

Fornal

Katarzyna

Ząbek

et al. 2020

Animals

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The Polish Konik horse is a primitive native breed included in the genetic resource conservation program in Poland. After World War II, intensive breeding work began, aimed at rebuilding this breed. Now, the whole Polish Konik population is represented by six male founder lines (Wicek, Myszak, Glejt I, Goraj, Chochlik and Liliput). Individuals representing all six paternal lineages were selected based on their breeding documentation. We performed a fragment analysis with 17 microsatellite markers (STRs) recommended by the International Society for Animal Genetics (ISAG). The genetic diversity and structure within the paternal lineages and the whole of the studied group were investigated. The average allelic richness was 6.497 for the whole studied group. The fixation index (FST; measure of population differentiation) was low (about 3%), the mean inbreeding coefficient (FIT) was low and close to 0, and the mean inbreeding index value (FIS) was negative. The mean expected heterozygosity was established at 0.7046 and was lower than the observed heterozygosity. The power of discrimination and power of exclusion were 99.9999%. The cumulative parentage exclusion probability equaled 99.9269% when one parental genotype was known and 99.9996% with both parents’ genotypic information was available. About 3% of the genetic variation was caused by differences in the breed origin and about 97% was attributed to differences among individuals. Our analysis revealed that there has been no inbreeding in the Polish Konik breed for the studied population. The genetic diversity was high, and its parameters were similar to those calculated for native breeds from other countries reported in the literature. However, due to the small number of breed founders and paternal lineages with unknown representation, the population’s genetic diversity and structure should be monitored regularly.

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Section: Discussionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Genetic Diversity and Population Structure of Polish Konik Horse Based on Individuals from All the Male Founder Lines and Microsatellite Markers

Fornal

Katarzyna

Ząbek

et al. 2020

Animals

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“…1). The obtained level of genetic diversity within breeds is comparable to the results found in other warmblood horses, including for example Haflinger (Vostrý et al, 2015) or Old Kladruber horses (Kasarda et al, 2016). The principal component analysis was performed to describe the highest proportion of variance in dataset.…”

Section: Resultssupporting

confidence: 68%

Genetic Structure of Warmblood Horses on Molecular-Genetic Level

Kasarda¹,

Moravčíková²,

Kadlečík³

2018

AgricultForest

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The aim of this study was to evaluate the genetic structure and potential loss of diversity within three horse breeds: Lipizzan (42), Furioso (38), and Nonius (18) on molecular-genetic level. The genotyping data were obtained from in total 98 individuals presenting the genepool of analysed breeds in Slovakia. The values of gene diversity (0.72) as well as heterozygosity (0.89) showed the prevalence of heterozygotes within each population. The negative value of F IS index (-0.25) pointed, in particular, to good level of diversity and balanced proportion of homozygous and heterozygous animals in populations, i.e. HWE equilibrium. The Shannon's information index (I=1.41) confirmed sufficient level of variability mainly in order to maintain the current state of biodiversity for future generation. The genetic distances on intra-and inter-population level revealed clearly distribution of individuals into the three separate genetic clusters. The highest genetic similarity was found between Nonius and Furioso breeds (DA=0.16). However, the pairwise F ST values and PCA analysis were not fully sensitive to detect the genetic differences among those breeds. We were able to detect only two genetic clusters, when Furioso and Nonius were linked together. This can be explained mainly by the use of English Thoroughbreds stallions and mares in building up process of both breeds. Considering that the results related to the state of diversity in presented breeds are correct, they can be used as basis for the further progress in breeding programs which is necessary to prevent the loss of heterozygosity and increase of inbreeding.

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“…Demographic and genetic parameters, based on population structure by origin and based on founders and ancestors' contributions, have also been used to monitor the changes in a population over a short period of time (Boichard, Maignel, & Verrier, 1997). These principles have been applied to characterize the genetic diversity in several horse breeds, including both sport and isolated breeds (Bussiman et al, 2018;Duru, 2017;Giontella, Pieramati, Silvestrelli, & Sarti, 2018;Hamann & Distl, 2008;Hasler et al, 2011;Kjöllerström, Gama, & Oom, 2015;Onogi, Shirai, & Amano, 2017;Schurink, Arts, & Ducro, 2012;Vicente, Carolino, & Gama, 2012;Vostrá-Vydrová, Vostrý, Hofmanová, Krupa, & Zavadilová, 2016;Vostry, Vostra-Vydrova, Hofmanova, Vesela, & Majzlik, 2015). Those estimates can be in turn used to optimize breeding strategies to avoid loss of genetic diversity and enhance breeding programmes.…”

Section: Introductionmentioning

confidence: 99%

Exploring genetic diversity in an Italian horse native breed to develop strategies for preservation and management

Ablondi

Vasini

Beretti

et al. 2018

J Animal Breeding Genetics

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Genetic diversity is a key factor for both adaptation and response to selection. The loss of genetic diversity causes a decrease in individual fitness, and it has a dramatically negative effect on population lifespan in the long term. This study aimed at exploring the genetic diversity at pedigree level of the Bardigiano horse breed, which is a native breed from Italy shaped for living in rural areas. In 1977, the Bardigiano studbook was founded to preserve the breed and for improving its use for riding and draft purposes. Pedigree data contained 9,469 horses, of which 3,416 were alive. Demographic and genetic parameters were estimated on subpopulations to evaluate potential genetic diversity differences among breeding and nonbreeding animals, and animals showing different breeding values (EBVs) for an index combining 18 conformation traits. Throughout the studied period, inbreeding steadily increased, reaching in the last birth year cohort a mean value equal to 0.10. The rate of inbreeding per generation, assuming a mean generation interval of 8.74 years, was equal to 1.64%. Moreover, significant differences on both average relatedness and inbreeding among horses with high and low EBVs were shown. Our study unravelled the state of genetic diversity in the Bardigiano breed, highlighting that breeding strategies for optimizing the contribution of breeding animals in the coming generations are needed to ensure long-term survival of the Bardigiano horse breed.

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Genetic diversity in Czech Haflinger horses

Cited by 5 publications

References 8 publications

Genetic Diversity and Population Structure of Polish Konik Horse Based on Individuals from All the Male Founder Lines and Microsatellite Markers

Genetic Diversity and Population Structure of Polish Konik Horse Based on Individuals from All the Male Founder Lines and Microsatellite Markers

Genetic Structure of Warmblood Horses on Molecular-Genetic Level

Exploring genetic diversity in an Italian horse native breed to develop strategies for preservation and management

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