Browsing by Author "Koncagul, Seyrani"
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Article Detection of Putative Loci Affecting Milk Yield in Turkish Awassi Sheep Using Microsatellite Markers(Springer, 2024) Koncagul, Seyrani; Kiraz, Selahaddin; Koyun, HasanOn the basis of comparisons between bovine and ovine genome mapping information, the aim of the study was to analyze the genetic diversity of selected DNA microsatellites from the bovine genome and to investigate their correlation with the average daily milk yield in Awassi sheep. 18 informative microsatellite markers were selected from the significant QTL regions affecting milk yield identified in the bovine genome in previous studies. The selected microsatellite markers were then amplified by PCR as reciprocal amplifications on the genomic DNA of Awassi sheep, with standard daily milk yield records. Thus, in this study, 18 microsatellite markers associated with milk yield in the bovine genome were examined for both determination of genetic polymorphism within the flock and the effects of marker loci on average daily milk yield in Awassi sheep. Allele frequencies of markers were determined based on the results of fragment analysis. The analysis of variance showed that the 123 bp allele at the marker locus BMS1341 on BTA2 significantly influenced the average daily milk yield of Ivesi sheep (P < 0.01). On the other hand, the BMS381 locus with a 115 bp allele on BTA2, the MCM140 locus with a 185 bp allele on BTA6, the BMS2721 locus with a 155 bp allele, the BM1237 locus with 174 and 180 bp alleles on BTA7, and finally, the BMS1967 locus with a 117 bp allele, the BM4208 locus with 176 and 182 bp alleles, and the INRA locus with a185 bp allele on BTA8 showed moderately significant effects on the average daily milk yield of Ivesi ewes (P < 0.05).Article Factors Affecting Lactation Milk Yield and Lactation Curve of Norduz Sheep in Farmer Condition(Kafkas Univ, veteriner Fakultesi dergisi, 2012) Koncagul, Seyrani; Daskiran, Irfan; Bingol, MehmetIn this research, mathematical models describing lactation curve of Norduz sheep breed were compared, and lactation parameters were estimated by selected model describing the lactation curve better than others. Then, factors affecting the lactation parameters and lactation milk yield were investigated. In the analysis, a total of 2.366 test-day records belonging to 189 completed lactations were used. It was observed that the lactation curve showed a decrease after lambing followed by an increase towards to the middle of the lactation, and then a decrease afterwards, like a sinusoidal shape. The forth degree Legendre polynomial model (LEG4), comparing to other models used, showed the best performance in describing the lactation curve of Norduz sheep raised in farmer condition. Total lactation milk yield, corrected to 180-day lactation lenght, was 130.9 +/- 3.24 kg. It was found that parity, lambing age and lambing month have a significant effect on lactation milk yield (LSV), and lambing month and parity also have a significant effect on lactation trajectory.Article Genomic Scan To Detect Qtl Using Snp Markers for Simulated Data by Regression Analysis in Half-Sib Design(Medwell online, 2009) Koyun, Hasan; Koncagul, Seyrani; Okut, HayrettinThe aim of the present study was to conduct a genome-wide screening for QTL (Quantitative Trait Loci) detection using the simulated phenotype and genotype data sets obtained from the QTL-MAS workshop 12. A genome scan was carried out in 45 half-sib families to identify QTL influencing a hypothetical trait. Among six chromosomes, each chromosome with 1000 SNP loci, I I informative markers at least 2 cM apart from one another were chosen based on PICs with highest chi(2)-statistic. Half-sib data were pooled and used simultaneously in the analyses conducted for each chromosome separately. Data were analyzed by generating an F-statistic every I cM on a linkage map by regression of phenotypes on the probabilities of inheriting an allele from the sire. Permutation tests at chromosome-wide significance thresholds were carried out over 1000 iterations. Among six chromosomes, significant putative QTL were detected on chromosome 1 (27 cM), 2 (36 cM), 3 (18 cM), 4 (0 cM) and 5 (96 cM) across the families (alpha = 0.01 and alpha = 0.05). There was no QTL detected, exceeding chromosome-wide significance level of p<0.05 and p<0.01 on chromosome 6.Article Growth Characteristics of Indigenous Norduz Female and Male Lambs(Ankara Univ, Fac Agr, 2010) Daskiran, Irfan; Koncagul, Seyrani; Bingol, MehmetThe objectives of the present study were to compare the growth curve models for their ability to describe the growth of Turkish Norduz sheep, and to estimate the growth curve parameters by the selected growth model. The data were collected from 93 male lambs and 86 female lambs from birth to 198 day of age. Five different nonlinear models, Brody, Gompertz, Logistic, Bertalanffy and Negative exponential, were compared using coefficient of determination (R-2), asymptotic mature weight (BWA), residual standard deviation (RSD) and coefficient of correlation (r) between the observed and estimated growth curves. The Logistic growth model was observed to be appropriate for explaining the growth of Norduz female and male lambs. Male lambs grew faster and attained larger mature weight than female lambs showing that sex is the main factor affecting the growth of Norduz lambs. Type of birth had no effect on the growth of the lambs.Conference Object Investigation of Genetic Structure in Van Cats Using Microsatellite Markers(Elsevier Science Bv, 2017) Koyun, Hasan; Koncagul, Seyrani; Karakus, Kadir; Okut, Hayrettin; Kucuk, Mursel; Yilmaz, Ayhan; Taspinar, MehmetArticle Morphological Characteristics of Zom Sheep(Kafkas Univ, veteriner Fakultesi dergisi, 2012) Koncagul, Seyrani; Akca, Nalan; Vural, Mehmet Emin; Karatas, Ahmet; Bingol, MehmetThis research was a descriptive study and carried out on Zom sheep raised in the mount Karacadag province in Diyarbakir, Turkey. The study was conducted to determine some morphological characteristics of the Zom sheep according to different age and sex groups. A total of 16 males and 195 females were measured. Overall means and standard errors of some characters of rams and ewes were: live weight 65.0 +/- 2.0 and 46.0 +/- 1.25 kg, wither height 76.2 +/- 1.57 and 67.9 +/- 0.94 cm, height at rump 75.5 +/- 0.83 and 67.9 +/- 0.50 cm, body length 66.1 +/- 0.91 and 60.2 +/- 0.55 cm, heart girth circumference 99.8 +/- 1.73 and 94.7 +/- 1.04 cm, chest depth 34.4 +/- 0.59 and 29.9 +/- 0.36 cm, chest width 21.1 +/- 0.49 and 18.2 +/- 0.30 cm, respectively. The overall results of this study show that the Zom sheep have some similarities with Karakas, Awassi and Akkaraman sheep according to morphological characteristics.Article Relationships Between Growth Characteristics and Gdf9 Gene Polymorphisms in Awassi Sheep(Taylor & Francis Ltd, 2024) Kiraz, Selahaddin; Koncagul, Seyrani; Koyun, HasanThe Awassi sheep, a breed with a distinctive fat tail, is bred specifically in the south-eastern region in Turkey. It has proven its adaptability to the hot environment of this region, especially in the provinces of & Scedil;anl & imath;urfa, Hatay and Gaziantep, which are close to the Syrian border. The aim of this study was to investigate the SNP polymorphisms in the GDF9 gene/exon2 using DNA sequencing. In addition, the study investigated the relationships between SNP genotypes and growth traits, in particular birth weight (BW), weaning weight (WW) and weight at the end of the grazing season (GSW), in Awassi sheep. Four different flocks with a total of 131 Awassi lambs were used. PCR was used to amplify exon2 of the GDF9 gene region, which has a length of 815 base pairs (bp), from the genomic DNA of the Awassi sheep. Thus, four new single nucleotide polymorphisms (SNPs) were identified. The results showed that although the effects of SNP2 and SNP4 on body weight (BW) were statistically significant, only SNP4 had a significant effect on weaning weight (WW) (P < 0.05). In addition, SNP1 and SNP3 were found to have no significant effect on any developmental trait in the dataset.Article Reproductive Performance of Ewes and Growth Characteristics of Lambs in Zom Sheep Reared in Karacadag District(Kafkas Univ, veteriner Fakultesi dergisi, 2013) Koncagul, Seyrani; Vural, Mehmet Emin; Karatas, Ahmet; Akca, Nalan; Bingol, MehmetThis is the first study and report in which some ewe reproductive and lamb growth performances of Zom sheep were investigated and described in Turkey. The research was carried out on three different flocks randomly chosen among the Zom sheep flocks in the district of Karacadag surrounded by Diyarbakir, Sanliurfa and Mardin provinces, and lasted for two years, 2010 and 2011. The data consisted of 242 and 254 heads of lamb born from 226 and 214 heads of ewe in 2010 and 2011, respectively. Lambing rate (LR), twinning rate (TW), fecundity (FEC) and litter size (LITS) were found as 94%, 17%, 1.09 and 1.17 on average, respectively. There was no significant difference among flocks within years or among years within flocks in terms of ewe reproductive performance, except for the flock 2 in terms of TW. Average means of the birth weight (BWT), weaning weight (WWT) at 90th day and 6th month live weight (SMLW) were 4.00 kg and 22.06 kg, 36.11 kg, respectively. The effects of age of dam, type of birth and sex of lambs were significant on BWT, WWT and SMLW (P<0.05). Besides the WWT was also significantly affected by the year (P<0.05), every 1 kg increase in BWT caused 2.02 +/- 0.281 kg increase on average in WWT of lambs (P<0.01). In addition, it was observed that the havier lambs at birth were havier in terms of SMLW (P<0.01). The average daily weight gain (ADWG1) and survival rate (SR) of lambs at weaning were 200 g/day and 90%, respectively.Article A Review on Population Characteristics of Gilthead Seabream (Sparus Aurata)(Medwell online, 2010) Arabaci, Muhammed; Yilmaz, Yasin; Ceyhun, Saltuk Bugrahan; Erdogan, Orhan; Dorlay, Hakan Galip; Diler, Ibrahim; Koncagul, SeyraniS. aurata is a marine fish living along the Atlantic coasts of Europe and the Mediterranean Sea. It is an important food species, so that its production reached 128,943 t in the European aquaculture in 2008. However, little is known on its biology, in particular the efective and census sizes, distribution, spawning grounds and behaviour. Also the species subdivision still needs to be clarified. In this review, studies related with gilthead sea bream populations and problems with the clarification of gilthead seabream population structure in hatchery and wild were reviewed. Also, it was intensified on potential research areas, having importance in determination of population structure of gilthead seabream such as morphology and behaviour in hatchery and wild. Determination of the genetic structure of S. aurata populations based on behaviour and morphology will not only contribute greatly to biological clarification of the species but also will help the development strategy for conservation of natural stocks (e.g., protecting the stopover points) and the determination of reference stocks, which is important for the culture of gilthead seabream to use in the genetic improvement programmes.Article Single Nucleotide Polymorphisms of Gdf9 Gene/Exon 2 Region and Their Associations With Milk Yield and Milk Content Traits in Karakas and Norduz Sheep Breeds(Tubitak Scientific & Technological Research Council Turkey, 2021) Koyun, Hasan; Kiraz, Selahaddin; Karaca, Serhat; Koncagul, Seyrani; Yilmaz, Ayhan; Karakus, Kadir; Aygun, TurgutKarakas and Norduz sheep have been adapted to the Lake Van region of Turkey for many years as being domestic genetic resources and meat, milk, and fleece traits are a reliable economic resource especially preferred by small family businesses around the area. In this study, the data set consisted of milk yield (MY) and milk content components; milk fat (MF), fat-free dry matter (FFDM), dry matter (DM), protein (Pro), lactose (Lac), pH, acidity H (aH), and lactic acid (Lac). Besides, Karakas (n = 30) and Norduz (n = 26) sheep were chosen to investigate based on the SNP method. Correspondingly, genomic DNA from both breeds exon 2 of the GDF9 gene region was amplified, 815 base pairs (bp) in length, by means of PCR. Therefore, there were three noval SNPs detected in both breeds under investigation. Although SNP1 and 2 with genotypes of GG and AG had statistically significant impacts on both milk production and milk components (p < 0.01), SNP3 with genotypes of TT, TC had no significant effects on the milk characteristics in question.