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Tétel Szabadon hozzáférhető A review on the effect of endocrine disruptors on reproductive performance of small ruminant(2020) Mujitaba, Malam Abulbashar; Bodó, Szilárd; Vass, Nóra; Abdullahi, UsmanTétel Szabadon hozzáférhető A review on the trend of livestock breeds in Laos(2021) Xayalath, Somsy; Mujitaba, Malam Abulbashar; Ortega, Arth David Sol Valmoria; Rátky, JózsefTétel Szabadon hozzáférhető Alternative Opportunities to Collect Semen and Sperm Cells for Ex Situ In Vitro Gene Conservation in Sheep(2022) Mujitaba, Malam Abulbashar; Egerszegi, István; Kútvölgyi, Gabriella; Nagy, Szabolcs; Vass, Nóra; Bodó, SzilárdTétel Szabadon hozzáférhető Development of assisted reproductive technologies for ex-situ in vitro gene conservation in sheepMujitaba, Malam Abulbashar; Pálfyné Vass, Nóra; Bodó, Szilárd; Állattenyésztési Tudományok Doktori Iskola; Mezőgazdaság-, Élelmiszertudományi és Környezetgazdálkodási KarThe current study involved three different experiments to assess the effects of epididymal spermatozoa (EPS) collection methods, ram breed, three (3) different commercial soy-lecithin-based semen extenders {Andromed® (AND), Bioxcell® (BIO), and OviXcell® (OVI)}, and two spermatozoa concentrations (400×106 vs 200×106 spermatozoa/ml) on the freezability of ram epididymal spermatozoa (REPS). Lastly, we evaluated the developmental kinetics of in vitro-produced sheep embryos fertilized with post-thaw REPS using ivf-Bioscience bovine media to enhance the conservation of local sheep breed genetic resources (GnR). Fourteen pairs of testes from German Mutton Merino (Merino:7) and Hungarian Black Racka (Racka:7) rams collected from a slaughterhouse for Experiment I. Post-mortem REPS were retrieved from the cauda epididymides by either Slicing or Incision method. Fresh samples were extended to 200×106/ml, filled into mini straws and equilibrated at 5 oC for 2 hours. Freezing was performed manually in a Styrofoam box. The fresh and post-thaw REPS’s Standard motility (SMP) and kinematic parameters (KP) were assessed using a CASA. The collection method did not significantly affect REPS’s fresh and post-thaw SMP and KP. The Merino breed had significantly (p<0.05) higher testicular weight (TW); in contrast, the Racka breed had significantly (p<0.05) better fresh LIN, STR, BCF and ALH and higher post-thaw LIN and BCF values. The Merino has heavier testicles and significantly (p<0.05) better cryo-tolerance in total motility, while the Racka fresh and post-thaw REPS have more linear movement and presented significantly (p<0.01) higher cryo-tolerance in most of the KP than the Merino Breed. In experiment II, the REPS were retrieved from nine adult rams’ testes of different breeds and diluted with each of the 3 extenders to both concentrations. Straws were frozen manually. SMP and KP were assessed by CASA, while spermatozoa viability, morphology and acrosomal integrity were evaluated using the Kovacs-Foote staining technique. The concentration did not significantly affect all the pre-freeze and post-thaw SMP and KP of REPS. The BIO and OVI had significantly higher pre-freeze and post-thaw BCF, post-thaw VAP and percentage of spermatozoa with intact head membranes than the AND. In contrast, the AND had a significantly lower percentage of REPS with tail defects than the BIO and OVI. The 400×106 spermatozoa/ml resulted in a significantly higher percentage of all intact head membranes than the 200×106 spermatozoa/ml. Experiment III comprised five (5) programs involving 216 cumulus-oocyte complexes (COCs). The COCs were matured for 23-24 hours, while IVF with post-thaw REPS in ivf-Bovine bioscience media. Viable sheep embryo with good developmental competence: overall cleavage rate of 43.0 %, a morula of 40.0 %, and a blastocysts rate of 21.0 % were obtained, comparable to those reported in the literature. In conclusion, breed significantly affects REPS cryo-tolerance, and either of the collection methods can be used to retrieve REPS without adverse effects. Freezing significantly increased tail defects and decreased the percentage of REPS with distal cytoplasmic droplets. Cryopreservation of REPS is recommended in 400×106 spermatozoa/ml concentration. All three extenders must be optimised to preserve viability, membrane integrity and better normal morphology of REPS. In vitro embryo production using post-mortem/abattoir-sourced gametes can be an alternative to MOET and ovum pick-up in cryo-banking of valuable local sheep breeds.Tétel Szabadon hozzáférhető Effects of birth weight on puberty and the reproductive performance of crossbred Moo Lath x Duroc gilts = A születési súly hatása az ivarérésre és a szaporodásbiológiai teljesítményre keresztezett Moo Lath x Duroc kocasüldőknél(2023) Xayalath, Somsy; Mujitaba, Malam Abulbashar; Ortega, Arth David Sol Valmoria; Khangembam, Rojesh; Novotniné Dankó, Gabriella; Rátky, JózsefTétel Szabadon hozzáférhető In Vitro Gene Conservation Status and the Quality of the Genetic Resources of Native Hungarian Sheep Breeds(2024) Mujitaba, Malam Abulbashar; Tokár, Alexandra; Balogh, Eszter Erika; Debnár, Viktória Johanna; Javkhlan, Ariuntungalag; Vásárhelyi, Panka Boglárka; Egerszegi, István; Nagy, Szabolcs Tamás; Kútvölgyi, GabriellaTétel Szabadon hozzáférhető Perspectives of the livestock sector in the Philippines: A review(2021-06-01) Ortega, Arth David Sol; Mujitaba, Malam Abulbashar; Xayalath, Somsy; Gutierrez, Winson; Soriano, Ana Celina; Szabó, CsabaThe Philippine livestock industry is a vital component in the country's agricultural sector. It contributes around 18.23 percent of the gross output value in agriculture and provides livelihood to many people living in rural areas, signifying its importance with regard to the country’s economy. The constantly increasing demand for animal protein associated with the increase of the world’s population led to the intensification of livestock production, realized through the various initiatives implemented by the government, such as the import of high producing purebreds of various species. This strategy greatly influenced the country's animal genetic resource's diversity and increased food animals' population; however, it impacted the native breeds of food animals. Understanding the characteristics, performance and value of native and exotic breeds is essential to prioritize their livestock industry existence. Thus, this paper aims to characterize various native and exotic breeds of livestock in the Philippines and assess the current conservation of native animals.Tétel Szabadon hozzáférhető Perspectives of the livestock sector in the Philippines: A review(2021) Ortega, Arth David Sol Valmoria; Mujitaba, Malam Abulbashar; Xayalath, Somsy; Gutierrez, Winson; Soriano, Ana Celina; Szabó, CsabaTétel Szabadon hozzáférhető The recent state of cryopreservation techniques for ex-situ gene conservation and breeding purposes in small ruminants: A review(2020-05-20) Mujitaba, Malam Abulbashar; Vass, Nóra; Bodó, SzilárdThe viewpoint of the recent cryopreservation techniques (CT) suggests the use of a reduced volume of cryopreservation solution, high concentration of cryoprotectants and ultra-rapid cooling and warming rates help to reduce cryo-injury and maximize the viability of the preserved animal genetic resources (AnGR). The CT had now become widely accepted as one of the best methods of choice for the ex-situ conservation of AnGR due to its high success rate recorded and no-invasive nature as compared to the conventional slow rate freezing (CSRF). Rapid advances and wide acceptability of the use of assisted reproductive technologies (ART’s) particularly artificial insemination (AI) in animal breeding had resulted in a greater loss of a large number of good quality genes in virtually almost all the native breeds of animals across the globe. Small ruminant (SR) animals are not an exception in such present predicaments situation of erosion and dilution of the valuable AnGR among the native breeds. As a result of this, 148 and 16 breeds of sheep and goats respectively have already become extinct in Europe and the Caucasus. In view of the aforementioned situation, the present review aimed at exploring some of the current states of development, roles played and potentials of CT in the conservation of SR genes and genome for the immediate and future breeding purposes for sustainable development. It basically covers; animal genetic resource, the need to conserve AnGR, tools for ex situ in vitro conservation of AnGR and recent developments in breeding and cryopreservation of SR AnGR. Cryopreservation is playing a pivotal role in ex-situ gene conservation of AnGR. Decline in genetic diversity among SR breed population was high in Europe and the Caucasus. There is therefore, need for improvent on current stringent measures on conservation of AnGR in this region of the world.Tétel Szabadon hozzáférhető A review on the trend of livestock breeds in Laos(2021-06-01) Xayalath, Somsy; Mujitaba, Malam Abulbashar; Ortega, Art David Sol Valmoria; Rátky, JózsefWhen the livestock sector is considered an essential role in farmers' livelihood, and local breeds are still the critical component of animal breeding in Laos. Thus, there is a need to review the previous, current situation and prospects for Laos' livestock production. It aimed to study the different traits among the existing dominant local and improved livestock breeds (cattle, pig, and goat) and a more in-depth study on the livestock sector's previous evolving and prospects. Our findings revealed that the general trend of livestock population in Laos increased year-by-year for over 45 years, except for 1995 to 2000. It was decreased by almost 22% due to the new national strategy on economic revolution. The first foreign breeds were introduced into Laos, i.e., Large White, Landrace, and Duroc in 1980, Red Sindhi bulls in 1998, the frozen semen of Red Brahman 2003, and Bach Thao goats between 2001 to 2003. Unfortunately, many data are still not precise for introducing other foreign breeds like Boer goats, Thai Grey and Red Brahman. There were many missing data on the improvement of livestock breeds in Laos, including the local and improved breeds' reproductive and productive performance, which needs more study and research. We conclude that the semi-complex farm operation should be applied to improve livestock breeding and their productions in Laos.Tétel Szabadon hozzáférhető The impact of retrieval method and breed on the motility and kinematic parameters of fresh and post-thaw ram epididymal spermatozoa(2024) Mujitaba, Malam Abulbashar; Kútvölgyi, Gabriella; Debnár, Viktória Johanna; Tokár, Alexandra; Posta, János; Bodó, Szilárd; Vass, NóraTétel Szabadon hozzáférhető The Influence of Three Commercial Soy Lecithin-Based Semen Extenders and Two Spermatozoa Concentrations on the Quality of Pre-Freeze and Post-Thaw Ram Epididymal Spermatozoa(2024) Mujitaba, Malam Abulbashar; Kútvölgyi, Gabriella; Szentpáli-Radnai, Judit; Debnár, Viktória Johanna; Tokár, Alexandra; Vass, Nóra; Bodó, SzilárdTétel Szabadon hozzáférhető The recent state of cryopreservation techniques for ex-situ gene conservation and breeding purposes in small ruminants: A review(2020) Mujitaba, Malam Abulbashar; Vass, Nóra; Bodó, Szilárd