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1.

001-es BibID:BIBFORM129903
035-os BibID:(WoS)001495867400001 (Scopus)105006592246
Első szerző:Barsi Brigitta (állattenyésztő mérnök)
Cím:Analysis of population structure in hungarian coldblood horses based on pedigree information / Brigitta Barsi, János Oláh, János Posta
Dátum:2025
ISSN:2076-2615
Megjegyzések:The Hungarian Coldblood horse was developed in the 1920s by crossing local mares with draft horses imported from Belgium and France, and was approved as an official horse breed in 1954. The aim of the study was to analyze the quality of the pedigree, generation interval, gene origin, and inbreeding. The pedigree information was received from the Hungarian Coldblood Horse Breeding Association. The studbook data of the registered animals up to 2023 were evaluated. Two reference populations were chosen: horses having offspring in 1989 and 2023. The final database contained 21,699 horses. Pedigree data of the total population and the actual breeding stock were analyzed using Endog 4.8. and Grain 2.2. software. The complete generation equivalent was 4.64 and 7.72, whereas the average maximum generations was 7.90 and 13.06 for the total and reference population, respectively. There were significant differences between the parent-offspring pathways of generation intervals. In the total stock, the first 10 individuals are present in 26.71%, while in the actual breeding stock, they are present in 37.84%. The average Wright's inbreeding coefficient was 1.13% and 2.35% in the total population and the actual breeding stock. Kalinowski's new decomposition of inbreeding showed that inbreeding does not originate from the past; inbreeding is stronger in more recent generations. There was a reasonable bottleneck effect. A more careful mating design might be needed to avoid inbreeding in the future.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Hungarian Coldblood breed
pedigree analysis
pedigree quality
gene origin
inbreeding
Megjelenés:Animals. - 15 : 10 (2025), p. 1-13. -
További szerzők:Oláh János (1976-) (állattenyésztés) Posta János (1978-) (informatika tanár, agrármérnök)
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DOI
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2.

001-es BibID:BIBFORM101836
035-os BibID:(WoS)000754859100001 (Scopus)85122892075
Első szerző:Gáspárdy András
Cím:Evaluation of Maternal Genetic Background of Two Hungarian Autochthonous Sheep Breeds Coming from Different Geographical Directions / Gáspárdy András, Zenke Petra, Kovács Endre, Annus Kata, Posta János, Sáfár László, Maróti-Agóts Ákos
Dátum:2022
ISSN:2076-2615
Megjegyzések:Simple Summary By the 19th century, adequately producing, independent domestic animal breeds had developed in many regions around the globe. However, from the middle of the 20th century they have largely been replaced by high-performing, specialized, single-purpose cosmopolitan breeds. Breed maintenance is an activity aimed at rescuing old breeds from the threat of extinction. This process includes recording the valuable traits of a rare breed, specific diversity conservation selection, and utilization in the original production environment. Additionally, it deals with the history of breeds and the study of their genetic makeup. The aim of this paper is to evaluate the maternal genetic background of two autochthonous sheep breeds in Hungary. The aim of our research was the evaluation of the maternal genetic background of two Hungarian autochthonous sheep breeds of different geographical origin. A major argument for the preservation of endangered animal breeds is their documented past and historical importance. These also include the registration of pedigree data. This is the first study to evaluate and compare Tsigai and Cikta sheep in Hungary. Our investigation is based on two complete sequences of mitochondrial DNA (cytochrome b gene and control region). Our research was performed on these two sheep breeds with markedly different breed histories and breed characteristics to determine a possible common maternal genetic background, as ultimately the origin of both breeds can be traced back to Asia Minor. Between 2015 and 2017, a total of 203 biological samples were taken using a newly introduced founder sampling method. We found that the prevailing haplogroup B accounted for over 80% of both breeds, strengthening the common ancestral root. However, the pairwise genetic differentiation estimates (K-ST) calculated using the sequence-based statistics for cytochrome b gene and control region were 0.034 and 0.021, respectively (both at level p < 0.05); thus, revealing genetic differentiation in both sequences between the Tsigai and Cikta. We note that the known different history of the breeds is clearly justified by the currently studied deviations in their maternal genetic background.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Animals. - 12 : 3 (2022), p. 1-12. -
További szerzők:Zenke Petra Kovács Endre Annus Kata Posta János (1978-) (informatika tanár, agrármérnök) Sáfár László Maróti-Agóts Ákos
Pályázati támogatás:VEKOP-2.3.2.-16-2016-00012
Egyéb
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
Szerző által megadott URL
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3.

001-es BibID:BIBFORM103487
035-os BibID:(WoS)000846223000001 (Scopus)85137270131
Első szerző:Klein Renáta (vidékfejlesztő agraámérnök, geográfus)
Cím:Pedigree-Based Description of Three Traditional Hungarian Horse Breeds / Klein Renáta, Oláh János, Mihók Sándor, Posta János
Dátum:2022
ISSN:2076-2615
Megjegyzések:The Mezőhegyes Stud was founded in 1784 where three different horse breeds were developed: the Furioso-North Star, the Gidran, and the Nonius. These breeds were based on the same mare population, but each breed had different utilization purposes. Our aim was to analyze the pedigree information of these three indigenous breeds. The genealogical information was traced back from the actual breeding population back to the founder animals, and the final database contained more than 47,000 horses. The reference populations were defined as the registered breeding animals in 2019. The complete generation equivalent was 16.45 for the Gidran breed, 15.18 for Furioso-North Star, and 12.64 for Nonius, respectively. Due to the utilization of English Thoroughbred during the breeding history, the average maximum generations were close to 36 generations for each breed. The average relatedness was approximately 4%. The average Wright's inbreeding coefficient was the highest for the Nonius breed (5.59%). Kalinowski's decomposition of inbreeding showed that inbreeding is originated mainly from the past; the current fixation of alleles was higher for the Nonius horse breed. There was a reasonable bottleneck effect for each breed. The estimated effective population sizes suggest that there is no problem with the maintaining of Mezőhegyes horse breeds.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
pedigrélemezés
őshonos
genetikai divezitás
Megjelenés:Animals. - 12 : 16 (2022), p. 1-10. -
További szerzők:Oláh János (1976-) (állattenyésztés) Mihók Sándor (1950-) (agrármérnök) Posta János (1978-) (informatika tanár, agrármérnök)
Pályázati támogatás:EFOP-3.6.3-VEKOP-16-2017-00008
EFOP
Internet cím:Szerző által megadott URL
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4.

001-es BibID:BIBFORM136538
Első szerző:Kovács Máté (állattenyésztési tudományok, PhD hallgató)
Cím:Population structure and genetic diversity among Lipizzan mare families in Hungary based on microsatellite genotyping / Máté Kovács, Bettina Hegedűs, Sándor Mihók, Renáta Knop, Csaba Szabó, János Posta
Dátum:2026
ISSN:2076-2615
Megjegyzések:The conservation of genetic diversity in historically structured horse breeds requires fine-scale population genetic evaluation beyond conventional pedigree-based approaches. The present study assessed genetic diversity, population structure, and mare family differentiation in a Lipizzan horse population using 16 ISAG/FAO-recommended microsatellite markers. A total of 172 mares representing 29 mare families were genotyped. All loci were polymorphic, with a mean number of alleles per locus of 6.69 and a mean effective number of alleles of 3.56. The average polymorphism information content (PIC = 0.66) indicated high marker informativeness. Mean observed heterozygosity was slightly lower than expected heterozygosity, although the overall negative inbreeding coefficient suggested general heterozygote excess and low population-level inbreeding whilst the genetic differentiation among mare families was moderate. The principal components and the STRUCTURE analysis indicated admixture among mare families. Seven private alleles were detected across six loci, highlighting the presence of rare lineage-specific variants. These findings emphasize the importance of mare family-based analyses for identifying hidden genetic structures that may not be captured by population-level averages. The integration of microsatellite based diversity evaluation provides a robust framework for de-signing sustainable breeding and conservation strategies aimed at preserving both overall variability and rare lineage specific genetic components.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
gene conservation
breeding management
population structure
genetic differentiation
Lipizzan
Megjelenés:Animals. - 16 : 7 (2026), p. 1-21. -
További szerzők:Hegedűs Bettina (1995-) (mezőgazdasági biotechnológus) Mihók Sándor (1950-) (agrármérnök) Knop Renáta (1983-) (állatorvos) Szabó Csaba (1968-) (agrármérnök) Posta János (1978-) (informatika tanár, agrármérnök)
Internet cím:Szerző által megadott URL
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Intézményi repozitóriumban (DEA) tárolt változat
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5.

001-es BibID:BIBFORM124242
035-os BibID:(Scopus)85205096662 (WoS)001326286500001
Első szerző:Posta János (informatika tanár, agrármérnök)
Cím:Pedigree-Based Description of Danubia Alba Rabbit Breed Lines / János Posta, Csongor Demeter, Zoltán Német, Máté Sándor, Zsolt Gerencsér, Zsolt Matics
Dátum:2024
ISSN:2076-2615
Megjegyzések:The diversity of livestock animal breeds is an integral part of global biodiversity and requires careful management for sustainability and future availability. Avoiding inbreeding is a crucial aspect of mating of breeding animals. Our aims were to describe the quality of the pedigree, generation interval, gene origin, inbreeding, and effective population size of Danubia Alba rabbit lines. Line "D" is the maternal, whereas lines "C" and "X" are used as the paternal lines. The pedigree information was followed back from the actual breeding rabbits up to the founder animals. The rabbits having offspring in 2023 were chosen as reference populations for each line. The complete generation equivalent (GenCom) was 17.68 for line "C", 18.32 for line "D", and 17.49 for line "X", respectively. The maximum number of generations (GenMax) was above 30 for each line. The estimated bottleneck effect is mostly the result of selection and not a real genetic loss. The Wright inbreeding coefficient (F_Wright) was the highest for the "X" line rabbits, whereas it was the lowest for the line "D". Kalinowski's decomposition of inbreeding showed that it originated mostly from the past; the current fixation of alleles was quite similar for the line "C" and "D". Based on the predicted effective population sizes, it seems that there is no problem in maintaining of Danubia Alba lines.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
pedigree quality
genetic diversity
gene origin
homozygosity
Oryctolagus cuniculus var. domestica
Megjelenés:Animals. - 14 : 18 (2024), p. 1-10. -
További szerzők:Demeter Csongor Német Zoltán Sándor Máté Gerencsér Zsolt Matics Zsolt (1977-) (agrármérnök)
Pályázati támogatás:ÚNKP-23-5-DE-473
Egyéb
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6.

001-es BibID:BIBFORM091748
035-os BibID:(WoS)000554088500001 (Scopus)85088161984
Első szerző:Posta János (informatika tanár, agrármérnök)
Cím:Historical Changes and Description of the Current Hungarian Hucul Horse Population / Posta János, Somogyvári Enikő, Mihók Sándor
Dátum:2020
ISSN:2076-2615
Megjegyzések:Originally, the Hucul horse breed was bred in the northeastern parts of the forested Carpathians. Only a few animals survived the Second World War and the regeneration of the breed started in those times. The aim of the current work was to give an overview of this rescue work from gene conservation point of view with the evaluation of the population changes within this few decades-long time interval. The pedigree quality, gene origin, inbreeding and status of stallion lines and mare families were evaluated. The main finding of the study was that inbreeding in the recent years was successfully limited and current inbreeding levels are the reason of previous gene fixations. Due to the increased number of mare families, genetic variability also increased. However, the proper management of the stallion utilization is important to prevent the future increasing of the inbreeding level of the Hucul breed. Gene conservation and management of small populations requires proper knowledge of the background and history of the breed. The aim of the study was the evaluation of population structure and changes of the Hungarian Hucul horse population. Population changes were described for the actual breeding stock as well as for groups of 10-year epochs reflecting major periods of change in the breed. Pedigree data of the registered population were analyzed using Endog and GRain software. The average value of equivalent complete generations was above nine for the actual breeding population. The longest generation interval was the sire-to-daughter pathway. The f(e)/f ratio had smaller changes than f(a)/f(e)ratio across the population history. Inbreeding and average relatedness as well as ancestral coefficients had increased during history. Kalinowski's decomposition of inbreeding showed that present inbreeding is smaller than it was done earlier during the last 20 years. Due to the continuous imports from other breeder countries, the genetic variability increased during the evaluated time periods.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Animals. - 10 : 7 (2020), p. 1-11. -
További szerzők:Somogyvári Enikő (1984-) (biológus ökológus) Mihók Sándor (1950-) (agrármérnök)
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7.

001-es BibID:BIBFORM129773
Első szerző:Szabó Csaba (agrármérnök)
Cím:The Effect of Poppy Oil on Egg Production and Calcium Metabolism in Japanese Quail / Csaba Szabó, Xénia Ozsváth, Brigitta Csernus, Gabriella Gulyás, Márta Horváth, Levente Czeglédi, János Oláh, Nafiatur Rizqoh, Gabriele Achille, János Posta
Dátum:2025
ISSN:2076-2615
Megjegyzések:Consumers tend to favor natural dietary supplements to improve their health. However, vendors rarely cite scientific evidence to justify these claims. In the case of poppy oil, it is often mentioned as having a positive effect on Ca metabolism-related disorders, but no proof has been provided. Therefore, the aim of our trial was to test the possible effect of poppy oil on calcium metabolism using Japanese quail layers as a model animal. A total of 120 four-week-old quail were divided into three dietary treatments (four cages per treatment, with ten birds in each cage): a control group (using sunflower oil as the energy source in the diet), 0.5%, and 1% poppy oil supplementation (replacing sunflower oil). Egg production, eggshell thickness, eggshell strength, and egg yolk color were investigated. Ca retention was determined using the acid-insoluble ash method. At the end of the experiment, two birds per cage were sacrificed, and uterus and jejunum samples were collected for gene expression analyses. Poppy oil supplementation improved egg production in terms of intensity, egg weight, and eggmass production. The thickness and eggshell strength decreased when 1% poppy oil was fed to the animals, while Ca retention improved. Poppy oil supplementation increased the expression of Ca transporter genes (CALB1, SLC8A1, and SLC26A9) in the uterus and ITPR1 in the jejunum. Our results indicate a possible effect of poppy oil on Ca metabolism. Further studies are needed to identify the active compound and to understand the mode of action.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
poppy oil
egg production
egg quality
calcium
Japanese quail
Megjelenés:Animals. - 15 : 9 (2025), p. 1-14. -
További szerzők:Ozsváth Xénia Erika Csernus Brigitta (1991-) (élelmiszerbiztonsági és -minőségi mérnök) Gulyás Gabriella (1985-) (agrár) Horváth Márta (1987-) (állattenyésztő mérnök) Czeglédi Levente (1977-) (agrármérnök) Oláh János (1976-) (állattenyésztés) Rizqoh, Nafiatur Achille, Gabriele Posta János (1978-) (informatika tanár, agrármérnök)
Pályázati támogatás:ÚNKP-23-4
Egyéb
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8.

001-es BibID:BIBFORM097793
035-os BibID:(WoS)000807166000001 (Scopus)85117914626
Első szerző:Török Evelin (mezőgazdasági mérnök)
Cím:Combinations of Linear Type Traits Affecting the Longevity in Hungarian Holstein-Friesian Cows / Török Evelin, Komlósi István, Szőnyi Viktor, Béri Béla, Mészáros Gábor, Posta János
Dátum:2021
ISSN:2076-2615
Megjegyzések:Simple Summary The selection for high-level milk production shortened the productive life of cows. In Hungary, the average number of lactations is only ca. 2.1. At the same time, the longevity, health status, milk production and reproduction were affected by the linear type traits, confirmed by several research studies. These studies, however, looked at the association of the linear type traits with longevity, using only one trait at a time. To take into account the connections between linear type traits, their combinations based on statistical analyses were considered. Identification of the risk ratio of various trait combinations could support corrective mating and bull selection. Several research studies confirm the association of the linear type traits with longevity, but only with one trait at a time. The aim of our study was to analyse the influence of combinations for linear type traits on longevity in the Hungarian Holstein-Friesian cows. Data were provided by four herds; the filtered dataset consisted of 17,717 cows. From the 14 available linear type traits, the most important combinations were identified based on principal components and cluster analysis. From the six identified combinations, only three (chest width-body depth, fore udder attachment-udder depth, angularity-rear udder height) proved to have a significant effect on longevity. A wide chest and deep body caused a high-risk ratio of culling. The lowest risk ratio was observed with cows having intermediate chest width and intermediate body depth. Very angular cows having low rear udder height were at the highest risk of culling. The lowest culling risk was found in cows with a lack of angularity and high rear udder height. Weak and loose fore udder along with deep udder had increased culling risk. Strong and tight fore udder subclasses were the most favourable as their risk ratios decreased towards the shallowing of udder depth.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Animals. - 11 (2021), p. 1-12. -
További szerzők:Komlósi István (1960-) (agrármérnök) Szőnyi Viktor Béri Béla (1951-) (agrármérnök) Mészáros Gábor Posta János (1978-) (informatika tanár, agrármérnök)
Pályázati támogatás:EFOP-3.6.3-VEKOP-16-2017-00008
EFOP
Internet cím:DOI
Intézményi repozitóriumban (DEA) tárolt változat
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