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001-es BibID:	BIBFORM101836
035-os BibID:	(cikkazonosító)218 (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 However, from the middle of the 20th century they have largely been replaced by high-performing, specialized, single-purpose cosmopolitan breeds.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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001-es BibID:	BIBFORM103487
035-os BibID:	(cikkazonosító)2071 (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 DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM091748
035-os BibID:	(cikkazonosító)1242 (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)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM097793
035-os BibID:	(cikkazonosító)3065 (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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