Person: ÇOBANOĞLU, ÖZDEN
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ÇOBANOĞLU
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ÖZDEN
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Publication Influence of some environmental factors on milk yield and milk components traits in jersey cows(Parlar Scientific Publications (P S P), 2019-01-01) Kul, Ertuğrul; Gürcan, Eser Kemal; Çankaya, Soner; Abacı, Samet Hasan; Ülker, Mehmet; Çobanoğlu, Özden; ÇOBANOĞLU, ÖZDEN; Bursa Uludağ Üniversitesi/Veteriner Fakültesi; 0000-0001-9633-634X; AAM-4544-2020This study was conducted to assess the effects of stage of lactation, parity and sampling season on milk yield and milk components in Jersey cows in Karakoy State Farm, Turkey. The data set consisted of 2657 milk records of 204 Jersey cows collected from September 2011 to December 2013. For this purpose, test day milk yield (TDMY) records and milk samples were taken once a month for 10-month period after parturition. The effect of stage of lactation, parity and sampling season on TDMY, fat percentage, protein percentage, fat yield and protein yield were found statistically significant (P<0.01). TDMY were correlated with fat percentage (-0.235) and protein percentage negatively (-0.254) but with fat yield (0.755) and protein yield positively (0.950) (P<0.01).In conclusion, these results suggest animal breeders that the effects of lactation stage, parity and sampling season may be taken into account in husbandry management to improve the milk yield and milk quality in Jersey cows.Publication Genetic variation in the bovine myogenic determination factor 1 (g.782g> A polymorphism) and its influence on carcass traits in Turkish grey steppe cattle(TUBİTAK, 2021-01-01) Ardıçlı, Sena; Çobanoglu, Özden; ARDIÇLI, SENA; ÇOBANOĞLU, ÖZDEN; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Genetik Anabilim Dalı.; 0000-0003-2758-5945; O-3394-2019MyoD1 gene is a member of the myogenic differentiation gene family, which plays a crucial role in growth and development. There is a lack of information about the MyoD1 variants and their phenotypic influences in Turkish Grey Steppe cattle. Therefore the present study aimed to determine the genetic variability of MyoD1 g.782G>A polymorphism and to evaluate its effects on carcass characteristics in Turkish Grey Steppe cattle. Analyses were conducted on a total of 142 Turkish Grey Steppe bulls. The PCR-RFLP technique was used for genotyping of the g.782G>A polymorphism in exon 1 of the MyoD1 gene. The population genetic parameters including compatibility with Hardy-Weinberg equilibrium, heterozygosity, number of effective alleles, the polymorphism information content, and the fixation index were calculated. Statistical analysis was carried out using the least square methods of the general linear model procedure. Results revealed that BB was the preponderant genotype (41.55%) but the AA genotype exhibited a remarkable close frequency (39.44%). Accordingly, allelic frequencies were very close to each other (A:0.49; B:0.51). The chi 2 test revealed that the corresponding MyoD1 locus did not conform to Hardy-Weinberg equilibrium (p < 0.001). Heterozygosity, number of effective alleles, and the polymorphism information content values were 0.4998, 1.9992, and 0.3749, respectively. Moreover, the fixation index value was found to be 0.6195. These results indicated that MyoD1 g.782G>A polymorphism is a mildly informative genetic marker for Turkish Grey Steppe cattle. Statistical analysis indicated that the studied MyoD1 locus was significantly associated with chilling loss, carcass bone content, and carcass length (p < 0.05). The AA genotype was characterized by a higher chilling loss percentage but lower carcass length and bone content compared to BB and heterozygous genotypes. This study may provide valuable information regarding cattle carcass assessment and improvement through marker-assisted selection.Publication Genetic Polymorphism of STAT1 and STAT5A Genes in Holstein, Jersey, and Indigenous Cattle Breeds in Turkey(Kafkas Univ, Veteriner Fakultesi Dergisi, 2020-03-01) Kul, Ertuğrul; Abacı, Samet Hasan; Gürcan, Eser Kemal; Çankaya, Soner; Çobanoğlu, Özden; ÇOBANOĞLU, ÖZDEN; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Genetik Anabilim Dalı.; 0000-0001-9633-634X; AAM-4544-2020This study aimed to determine genetic polymorphism in STAT1 and STAT5A genes for dairy cattle and some native cattle breeds in Turkey. 283 Jersey and a total of 472 Holstein cows from two different herds and 93 Grey Steppe, 85 Anatolian Black Cattle, and 66 East Anatolian Red cattle were used in this research. Generally, C allele gene frequency was higher than T allele for STAT1 in all breeds whereas C allele gene frequency was detected higher than G allele for STAT5A in Jersey and East Anatolian Red. On the other hand, G allele gene frequency was higher than C allele in Holstein, Grey Steppe, and Anatolian Black Cattle breeds. The expected deviations from the Hardy-Weinberg Equilibrium were significant only for Jersey breeds for STAT1 gene. Meanwhile, the expected deviation from equilibrium was also significantly different for Holstein in Black Sea Region (BSR), Anatolian Black Cattle and Grey Steppe for the STAT5A gene. FIS values were determined to STAT1 gene as negative for all breeds except for Holstein in Marmara Region (MR). Similarly, this value was determined to STAT5A gene as positive for all breeds except for Holstein in BSR. The genetic distances for two loci were calculated between 0.0029 and 0.1599 among all populations. Depending on the cluster analysis, Holstein in BSR and MR, Anatolian Black Cattle, East Anatolian Red were closely clustered to each other, while Grey Steppe and Jersey were located in completely different clusters. As a conclusion, based on the detected genetic diversity in STAT1 and STAT5A genes, it is possible to make a genetic improvement among bovine breeds raised in Turkey.Publication Determination of the association of ghr / alul gene polymorphisms with milk yield traits in holstein and jersey cattle raised in Turkey(Copernicus Gesellschaft Mbh, 2021-09-23) Kul, Ertugrul; Gurcan, Eser K.; Abaci, Samet H.; Cankaya, Soner; Cobanoglu, Ozden; ÇOBANOĞLU, ÖZDEN; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Genetik Mühendisliği Anabilim Dalı.; 0000-0002-1341-4056; GPX-7921-2022; JFS-8031-2023; ABA-4511-2020This research was carried out to determine the effect of a specific single nucleotide polymorphism (SNP) region in exon 10 of the growth hormone receptor (GHR) gene on milk production traits in Jersey and Holstein cows raised in Turkey. Milk samples were recorded as a test day milk yield (TDMY) and an adjusted based 305 d milk yield (305-DMY). Also, milk component traits were detected. Based on the scope of this study, a total of 748 dairy cows, including 305 Holsteins raised in the Marmara Region and 163 Holstein and 280 Jersey raised in the Black Sea Region, were genotyped for the GHR gene using the RFLP-PCR technique. Jersey cows carrying the GG genotype (5.24 %) were associated with higher fat content (P < 0.05). Jersey cows with GG and AG also had a higher protein content (3.44 % and 3.38 %, respectively) (P < 0.05). Similarly, the protein content was the highest in Holstein cows with the GG genotype (3.46 %) (P < 0.01), whereas Holstein cows having AA genotypes displayed higher TDMY (24.64 kg/d) (P < 0.05) and 305-DMY (8472.4 kg) (P < 0.01). The estimated increase in milk protein and fat contents due to the G allele was 0.07 % and 0.22 % in the Jersey breed, respectively. On the other hand, allele A was highly related to an increase in protein yield and 305-DMY of 0.04 and about 675 kg in the Holstein breed, respectively. The GHR gene should be considered as a potential candidate gene in marker-assisted selection programs to improve the performance of milk and related traits in Turkey dairy cattle populations.