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1.

001-es BibID:BIBFORM117361
Első szerző:Astuti, Putri Kusuma (állattenyésztési genetikus)
Cím:Genetics of coat colors and its role in climate change resiliency in sheep / Astuti Kusuma Putri, Sárkány Péter, Wanjala George, Kichamu Nelly, Kusza Szilvia
Dátum:2023
ISSN:2566-431x
Tárgyszavak:Agrártudományok Állattenyésztési tudományok előadáskivonat
könyvrészlet
coat color
genetic and genomics tools
Ovis aries
thermal resistant
Megjelenés:Genetics and Applications: An Aspiring Interdisciplinary Journal of Genetic Research, Speciasl edition, Book of abstracts. - p. 40. -
További szerzők:Sárkány Péter Wanjala, George (1984-) (Animal scientist) Kichamu, Nelly (1978-) (Animal scientist) Kusza Szilvia (1979-) (agrármérnök)
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2.

001-es BibID:BIBFORM113832
Első szerző:Astuti, Putri Kusuma (állattenyésztési genetikus)
Cím:Heat Stress: Can Animals be Stressed but still be Healthy? / Putri Kusuma Astuti, Roland Fajardo, George Wanjala, Nelly Kichamu, Husein Ohran, Bouabid Badaoui, Zoltán Bagi, Szilvia Kusza
Dátum:2023
ISSN:1841-9364 2344-4576
Megjegyzések:In this era of rapid climate change, heat stress has emerged as a major problem for sheep farming. The quantity and quality of sheep production, as well as the welfare, are all shown to be negatively impacted by heat stress. Reduced cellular immune function in sheep exposed to high temperatures increases susceptibility to various diseases,although the underlying mechanisms are unclear. The imbalance between oxidants and antioxidants, known as oxidative stress, negatively impacts animal health due to heat stress-induced impairments in immune responses, increased production of reactive oxygen species, and/or a lack of antioxidants. Heat stress in livestock has negative effects on both the cell-mediated and humoral immune responses. However, the negative effects of heat stress on immune response in sheep can vary by breed. This review discusses how heat stress affects sheep's immunity. An overview of some molecular markers related to immunity, such as interleukin (ILs), Toll-like receptors (TLRs), and also the heat stress protein (HSPs) in sheep, is also discussed. Finally, recent researchon the effects of antioxidant supplementation and other promising nutritional strategies for reducing heat stress and improving animal health is presented.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok konferenciacikk
folyóiratcikk
animal health
antioxidant
heat stress
immunity
sheep
Megjelenés:Scientific Papers: Animal Science and Biotechnologies. - 56 : 1 (2023), p. 194-202. -
További szerzők:Fajardo, Roland Wanjala, George (1984-) (Animal scientist) Kichamu, Nelly (1978-) (Animal scientist) Ohran, Husein Badaoui, Bouabid (1979-) (animal genetics engineer) Bagi Zoltán (1987-) (természetvédelmi mérnök, állatgenetika) Kusza Szilvia (1979-) (agrármérnök)
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3.

001-es BibID:BIBFORM122766
Első szerző:Kichamu, Nelly (Animal scientist)
Cím:Assessing the population structure and genetic variability of Kenyan native goats under extensive production system / Nelly Kichamu, George Wanjala, Ludovic Toma Cziszter, Péter Strausz, Putri Kusuma Astuti, Zoltán Bagi, Szilvia Kusza
Dátum:2024
ISSN:2045-2322
Megjegyzések:Indigenous goats are important to many livelihoods. Despite this, they are subjected to indiscriminate crossbreeding. This afects their genetic variability which is needed to survive in current regime of climate change. The study assessed population structure and genetic diversity of Galla and Small East African goats (SEA) using pedigree information. A total of 7384 animals, 5222 of the Galla and 2162 of the SEA breeds, born between the years 1983 and 2022, were utilized. Individuals with known parents were defned as reference population. From the results, the maximum generation traced for Galla and SEA populations was 14.6 and 14.5, respectively. However, only 6 and 5 generations for Galla and SEA were complete. Pedigree completeness increased with the increasing number of generations. The average generation interval (GI) for Galla and SEA was 3.84 ± 0.04 and 4.4 ± 0.13 years. The average increase in the rate of inbreeding per generation for Galla and SEA was 0.04 and 0.05, with the efective ancestors and founders (fa/fe) ratio being same (1.00) for both breeds. Fifty percent (50%) of the genetic variability in the populations was contributed by 3 and 1 ancestor for Galla SEA, respectively. The efective population size (Ne) was 5.19 and 4.77 for Galla and SEA. Therefore, the current breeding programs should be changed to avoid future genetic bottlenecks in this population. These fndings ofer an opportunity to enhance the current genetic status and management of Kenyan native goats and other regions with similar production systems.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Scientific Reports. - 14 : 1(2024), p. 1-11. -
További szerzők:Wanjala, George (1984-) (Animal scientist) Cziszter, Ludovic Toma Strausz Péter Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Bagi Zoltán (1987-) (természetvédelmi mérnök, állatgenetika) Kusza Szilvia (1979-) (agrármérnök)
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4.

001-es BibID:BIBFORM121782
Első szerző:Kichamu, Nelly (Animal scientist)
Cím:A Review on Indigenous Goats of East Africa: A Case for Conservation and Management / Nelly Kichamu, Putri Kusuma Astuti, George Wanjala, Péter Strausz, Zoltán Bagi, Szilvia Kusza
Dátum:2024
ISSN:2079-7737
Megjegyzések:Indigenous goats are important in the livelihoods of rural households in East African countries. This is due to their ability to produce and reproduce in different environments and climatic conditions. Even though these indigenous goats are important, there is little available information on the genetic characterization of these breeds in Africa and at the international level. This paper reviews the status of indigenous goats, highlighting their production systems, phenotypic and genetic characteristics, and genetic diversity, and proposes potential ways for sustainable improvement and conservation in East African countries. Most households use traditional production systems with various uncharacterized goat breeds and ecotypes, which are hence named after the tribe or locality in which they are found. Most of these goats are classified as small East African breeds, with significant variability in morphological features. Some of the challenges to goat production in this region are indiscriminate crossbreeding, lack of pedigree records, parasites and disease incidences, low-quality pastures, and low levels of management. There is a need for a collaborative approach amongst the actors in goat breeding value chains as well as integrating modern genomic tools into breeding programs to enhance selection. This will ensure the resilience and sustainability of these unique indigenous goat populations in East Africa.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
East African goats
genetic characterization
indigenous goats
phenotypic characterization
production systems
population structure
Megjelenés:Biology. - 13 : 6 (2024), p. 1-16. -
További szerzők:Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Wanjala, George (1984-) (Animal scientist) Strausz Péter (1977-) (történész) Bagi Zoltán (1987-) (természetvédelmi mérnök, állatgenetika) Kusza Szilvia (1979-) (agrármérnök)
Pályázati támogatás:Stipendium Hungaricum Program
Tempus
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5.

001-es BibID:BIBFORM120634
Első szerző:Kichamu, Nelly (Animal scientist)
Cím:Inbreeding and inbreeding dilemma in indigenous goats under extensive production systems: a review / Nelly Kichamu, George Wanjala, Putri Kusuma Astuti, Zoltán Bagi, Andrew Mbithi, Szilvia Kusza
Dátum:2024
ISBN:978-963-306-980-6
Tárgyszavak:Agrártudományok Állattenyésztési tudományok előadáskivonat
könyvrészlet
Megjelenés:21st Wellmann International Scientific Conference Book of abstracts / felelős kiadó Edit Mikó, szerk. Ingrid Melinda Gyalai, Szilárd Czóbel. - p. 19. -
További szerzők:Wanjala, George (1984-) (Animal scientist) Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Bagi Zoltán (1987-) (természetvédelmi mérnök, állatgenetika) Mbithi, Andrew (1989-) (veterinarian) Kusza Szilvia (1979-) (agrármérnök)
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6.

001-es BibID:BIBFORM118325
Első szerző:Wanjala, George (Animal scientist)
Cím:Eco-regional influence on genetic diversity, population structure, and signatures of selection of indigenous sheep in Kenya / George Wanjala, Putri Astuti Kusuma, Nelly Kichamu, Kusza Szilvia
Dátum:2021
ISBN:978-963-490-351-2
Tárgyszavak:Agrártudományok Állattenyésztési tudományok előadáskivonat
könyvrészlet
Megjelenés:Biotechnológia a Debreceni Egyetemen. Fókuszban az agrár- és élelmiszerbiotechnológia : Tudományos Szimpózium elődás összefoglalók. - p. 46-47. -
További szerzők:Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Kichamu, Nelly (1978-) (Animal scientist) Kusza Szilvia (1979-) (agrármérnök)
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7.

001-es BibID:BIBFORM118266
Első szerző:Wanjala, George (Animal scientist)
Cím:Assessing Genomic Inbreeding and Homozygosity Patterns in Hungarian Merino Sheep and its Relatives / George Wanjala, Putri Kusuma Astuti, Nelly Kichamu, Zoltán Bagi, Szilvia Kusza
Dátum:2023
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Genetic diversity
Hungary
Inbreeding coefficient
Merino
Sheep
SNP Markers
Megjelenés:Scientific Papers: Animal Science and Biotechnologies. - 56 : 1 (2023), p. 47-52. -
További szerzők:Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Kichamu, Nelly (1978-) (Animal scientist) Bagi Zoltán (1987-) (természetvédelmi mérnök, állatgenetika) Kusza Szilvia (1979-) (agrármérnök)
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8.

001-es BibID:BIBFORM109206
035-os BibID:(cikkazonosító)386 (WoS)000954097600001 (Scopus)85152367636
Első szerző:Wanjala, George (Animal scientist)
Cím:Assessing the genomics structure of Dorper and White Dorper Variants, and Dorper Populations in South Africa and Hungary / George Wanjala, Putri Kusuma Astuti, Zoltán Bagi, Nelly Kichamu, Péter Strausz, Szilvia Kusza
Dátum:2023
ISSN:2079-7737
Megjegyzések:Simple Summary: The Dorper sheep breed was created to thrive in harsh environments in South Africa. Two breed variants were developed in the selection process. The breed gained popularity and was exported to several regions of the world where it is reported to be doing better than the purported locally adapted sheep breeds. To enhance the performance of other native sheep breeds, Dorper is widely utilized in crossbreeding with native breeds. There has not been any research done to examine the genomic status of Dorper in South Africa and Dorper in other places outside of South Africa. The genomic architecture of white Dorper and Dorper from South Africa and Hungary are compared in this study. White Dorper, Dorper, and Dorpers from South Africa and Hungary all have significantly distinct genomes. Different environmental factors and variations in coat color could be the cause of the genetic variations. Abstract: Dorper sheep was developed for meat production in arid and semi-arid regions under extensive production systems in South Africa. Two variants with distinct head and neck colors were bred during their development process. White Dorper have a white coat while Dorper have a black head and neck. Both variants have grown in popularity around the world. Therefore, understanding the genomic architecture between South African Dorpers and Dorper populations adapted to other climatic regions, as well as genomic differences between Dorper and White Dorper variants is vital for their molecular management. Using the ovine 50K SNP chip, this study compared the genetic architecture of Dorper variants between populations from South Africa and Hungary. The Dorper populations in both countries had high genetic diversity levels, although Dorper in Hungary showed high levels of inbreeding. White Dorpers from both countries were genetically closely related, while Dorpers were distantly related according to principal component analysis and neighbor-joining tree. Additionally, whereas all groups displayed unique selection signatures for local adaptation, Dorpers from Hungary had a similar linkage disequilibrium decay. Environmental differences and color may have influenced the genetic differentiation between the Dorpers. For their molecular management and prospective genomic selection, it is crucial to understand the Dorper sheep`s genomic architecture, and the results of this study can be interpreted as a step in this direction.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
adaptation
dorper
genetic diversity
linkage disequilibrium
management best practices
population structure
Megjelenés:Biology. - 12 : 3 (2023), p. 1-11. -
További szerzők:Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Bagi Zoltán (1987-) (természetvédelmi mérnök, állatgenetika) Kichamu, Nelly (1978-) (Animal scientist) Strausz Péter Kusza Szilvia (1979-) (agrármérnök)
Internet cím:DOI
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9.

001-es BibID:BIBFORM107113
035-os BibID:(cikkazonosító)100715 (Scopus)85147874170 (WoS)000935726900001
Első szerző:Wanjala, George (Animal scientist)
Cím:On-station comparative analysis of reproductive and survival performance between Red Maasai, Dorper, and Merino sheep breeds / George Wanjala, Nelly Kichamu, Péter Strausz, Putri Kusuma Astuti, Szilvia Kusza
Dátum:2023
ISSN:1751-7311 1751-732X
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Animal. - 17 : 3 (2023), p. 1-6. -
További szerzők:Kichamu, Nelly (1978-) (Animal scientist) Strausz Péter Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Kusza Szilvia (1979-) (agrármérnök)
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10.

001-es BibID:BIBFORM106676
035-os BibID:(cikkazonosító)300 (WoS)000914082600001 (Scopus)85146777802
Első szerző:Wanjala, George (Animal scientist)
Cím:An on-station analysis of factors affecting growth traits of Pure Red Maasai and Dorper sheep breeds under an extensive production system / George Wanjala, Nelly Kichamu, Ludovic Toma Cziszter, Putri Kusuma Astuti, Szilvia Kusza
Dátum:2023
ISSN:2076-2615
Megjegyzések:This comparative study aimed to evaluate genetic and environmental factors` effects on thegrowth traits of lambs in Dorper and Red Maasai (RedM) sheep breeds. The data analyzed containedthe following measurements: birth weight (Bwt), weaning weight (Wwt), yearling weight (Ywt), birthtype (single or twins), and details on each lamb`s dam (dam ID and age) and sire. Except for the RedM,whose birth weight decreased with time, both breeds generally showed an increase in other growthweights across the study period, with yearly variations affecting both breeds. Additionally, analysis bya linear mixed model with restricted maximum likelihood (REML) showed that only breed as a factorsignificantly (p< 0.05) influenced birth weight; breed, sex, and birth type all significantly (p< 0.05)influenced weaning weight, whereas season, sex, and dam age significantly (p< 0.05) influencedyearling weight. The RedM breed outperformed the Dorper breed in post-weaning growth rate,demonstrating early resilience and adaptation to local environmental factors independent of maternalinfluence. Breed and non-genetic factors play a vital role in the growth of lambs, and the resultsof this study offer an opportunity for improved farm management under an extensive productionsystem and selection for the conservation of the indigenous Red Maasai breed.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
weaning weight
yearling weight
growth traits
non-genetic factors
extensive production
Megjelenés:Animals. - 13 : 2 (2023), p. 1-10. -
További szerzők:Kichamu, Nelly (1978-) (Animal scientist) Cziszter, Ludovic Toma Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Kusza Szilvia (1979-) (agrármérnök)
Pályázati támogatás:Tempus Public Foundation
Egyéb
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DOI
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11.

001-es BibID:BIBFORM105907
035-os BibID:(cikkazonosító)103505 (WoS)000920397200011 (Scopus)85143612439
Első szerző:Wanjala, George (Animal scientist)
Cím:A review on the potential effects of environmental and economic factors on sheep genetic diversity : consequences of climate change / George Wanjala, Putri Kusuma Astuti, Zoltán Bagi, Nelly Kichamu, Péter Strausz, Szilvia Kusza
Dátum:2023
ISSN:1319-562X 2213-7106
Megjegyzések:Climate change has a significant effect on the productivity of livestock including milk, meat, and reproduction. This could be attributed to the internal diversion of energy resources towards adaptive mechanisms. Among the climate change variables, thermal stress seems to be the major limiting factor in animal agriculture. A better understanding of the effects of climate change-influenced ecological factors on the genetic diversity of livestock species is warranted. Sheep is an ideal livestock species to be used in investigating environmental adaptation due to its wide range of agroecological habitats, genetic and phenotypic variability. There is a heavy reliance on sheep genetic diversity for future animal protein security, but the implications of climate change on their genetic diversity receive less attention. Here, the potential environmental factors influencing natural selection in sheep populations are presented. We argue that prolonged exposure to these factors plays a major role in influencing the development of adaptation traits in indigenous sheep breeds, consequently leading to the alteration of genetic diversity at specific loci. The factors discussed include hot temperatures (heat stress), insufficient water, low quantity and quality of forage, and prevalence of parasites, pests, and diseases. In addition, genetic diversity, some signatures of selection for adaptation and economic angles of selection are also briefly discussed. A better understanding of environmental factors influencing the genetic diversity of sheep populations will inform breeding and management programs and may offer an opportunity for greater production efficiency with low input costs.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Genetic diversiy
sheep populations
environmental factors
economic factors
climate change
Megjelenés:Saudi Journal of Biological Sciences. - 30 : 1 (2023), p. 1-10. -
További szerzők:Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Bagi Zoltán (1987-) (természetvédelmi mérnök, állatgenetika) Kichamu, Nelly (1978-) (Animal scientist) Strausz Péter Kusza Szilvia (1979-) (agrármérnök)
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DOI
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