Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Comparison of the Fleece Characteristics of Karakas and Norduz Sheep (Local Ewes in Turkey)
Kadir Karakus,Selcuk Seckin Tuncer,Serhat Arslan
Journal of Animal and Veterinary Advances , 2012,
Abstract: Data were collected from 10 Karakas and 10 Norduz sheep in Animal Science Breeding Farm, Yuzuncu Yil University, Turkey. Fleece characteristics in the sheep were investigated as greasy fleece weight (kg), clean fiber percentage (%), elasticity (%), breaking strength (g), fiber length (cm) and fiber diameter ( m).The sheep produced 1.836?0.102 kg for average greasy fleece weight. Greasy fleece weight, clean fiber percentage, elasticity, breaking straight, fiber length were observed 1.72?0.14 kg, 48.18?1.93%, 24.68?1.11%, 7.97?1.02 g, 37.12?1.49 mm for Karakas and same traits were determined 1.96?0.14 kg, 55.76?2.53%, 29.66?1.88%, 10.95?0.89g and 41.54?2.30mm for Norduz were 1.72?0.14kg and 1.96?0.14 kg, respectively. Karakas and Norduz were produced medium quality fibers. Therefore, homogeneity of the fleece is very important as well as fiber diameter. Karakas and Norduz sheep produced 30.13?1.52 m and 32.24?1.18 m for fiber diameter, respectively. Difference between breed of sheep have been significant for the clean fiber percentage, elasticity and breaking straight. Differences between breed and sex have not importance for other fleece traits.
Comparison of Some Fleece Yields and Characteristics for Ile de France x Akkaraman (B1) and (Ile de France x Akkaraman B1) x Karakas (F1) Crossbreed Sheep in Turkey
Selcuk Seckin Tuncer,Kadir Karakus,Serhat Arslan
Journal of Animal and Veterinary Advances , 2012,
Abstract: This study was carried out to determine and compares the some fleece characteristics and greasy fleece weights in Ile de France x Akkaraman (B1) and (Ile de France x Akkaraman B1) x Karakas (F1) crossbreds. Data were collected from 10 Ile de France x Akkaraman (B1) (IFA) and 10 (Ile de France x Akkaraman B1) x Karakas (F1) (IFAK) sheep in Animal Science Breeding Farm, Yuzuncu Yil University, Turkey. Greasy fleece weights (kg) were obtained at shearing in late June. Wool characteristics in the sheep were investigated for greasy fleece weight (kg), clean fiber percentage (%), elasticity (%), breaking strength (g), fiber length (mm) and fibre diameter (?m). Data for each wool characteristics were analyzed effecting on sex and breeds of sheep. Overall means of fleece characteristics were 52.70?1.53%, 23.03?1.37%, 6.37?0.41g, 37.93?1.16 mm and 27.68?0.77 ?m for clean fiber percentage, elasticity, breaking straight, fiber length and fiber diameter, respectively. There weren`t important differences between Ile de France x Akkaraman (B1) and (Ile de France x Akkaraman B1) x Karakas (F1) crossbreds for means of the greasy fleece and means of the fleece characteristics. As results of this study, it was found that a small improvement was observed in (Ile de France x Akkaraman B1) x Karakas (F1) crosses.
Environmental Factors Influencing Birth Weights of Norduz and Karakas Lambs
Kadir Karakus,Ecevit Eyduran,Memis Bolacali,Taner Ozdemir
Journal of Animal and Veterinary Advances , 2012,
Abstract: The aim of this study was to compare birth weights of Norduz and Karakas genotypes and determine the effects of gender, birth type, dam age and genotype on birth weight. The data were composed of a total of 204 (103 Norduz and 101 Karakas) lambs born in 2003 in Van, in located region of the Eastern Anatolia, Turkey. The effects of gender (p<0.05), birth type (p<0.05) and dam age (p<0.05) on birth weight were found to be significant, whereas difference among averages of birth weight of breeds was found to be non- significant. As a result, using of birth weight as crucial criterion for early selecting animal is based on determination and elimination of some factors affecting the trait.
The Effect of Gender, Genotype, Dam Age, Birth Year and Birth Type on Birth Weight: Norduz and Karakas Lambs
Kadir Karakus,Cemal Budag,S. Seckin Tuncer,Taner Ozdemir,Ecevit Eyduran
Journal of Animal and Veterinary Advances , 2012,
Abstract: The present study was conducted to determine the effects of several environmental factors on 572 lambs (229 Karakas and 343 Norduz) raised at Research and Application Farm of Agricultural Faculty, Yuzuncu Yil University, Van, Turkey. In this study, birth type (single and twin), gender (male and female), dam age at lambing (1, 2, 3, 4, 5, 6 and 7) and birth year (2004, 2005, 2006 and 2007) and birth weights (kg) of Norduz and Karakas Lambs were recorded. According to results obtained from the present study, genotype factor on birth weight of Norduz lambs was non-significant, the influences of gender (p<0.001), dam age (p<0.01), birth type (p<0.001) and birth year (p<0.05) on it were found significant. As a result, the birth weight trait provides useful information for early selection criteria in breeding program.
Correlations of subjectively assessed fleece and conformation traits with production and reproduction in Afrino sheep
M.A. Snyman, W.J. Olivier
South African Journal of Animal Science , 2002,
Abstract: Data used for this study were collected on the Carnarvon Afrino flock from 1986 to 1998, and include data records on several subjectively assessed traits, body weight and fleece traits of 3291 animals, the progeny of 127 sires and 772 dams. Reproduction data of 686 ewes born from 1986 to 1997 were also included. The heritabilities of and genetic and phenotypic correlations among the subjectively assessed traits were estimated, as well as the genetic and phenotypic correlations of these traits with body weight, objective fleece traits and reproduction. Heritability estimates for the various subjectively assessed traits ranged from 0.06±0.02 for straightness of the top line to 0.51±0.04 for softness of fleece. Positive genetic correlations, ranging from 0.33±0.18 to 0.80±0.06 were estimated amongst the conformation traits head, front quarters, top line and hocks. High genetic correlations were estimated among the subjectively assessed fleece traits and fibre diameter, where animals with lower fibre diameter had softer fleeces, better crimp definition, their fleeces were more even, less dense and had higher creeping belly scores (the extent to which belly wool tends to creep up the side into the fleece). Estimated genetic correlations between the subjectively assessed fleece traits and reproduction were variable in sign and magnitude. The most important of these is the unfavourable genetic correlation (-0.33±0.23) between creeping belly and reproduction. The conformation traits had moderate to high genetic correlations with body weight at all ages. Of the subjectively assessed fleece traits, creeping belly score had the highest genetic correlation with body weight, ranging from -0.26±0.10 for weaning weight to -0.38±0.07 for 15-month body weight. No noteworthy phenotypic correlations were discernable between the reproductive traits and any of the subjectively assessed traits. Of the objective fleece traits, only fibre diameter had some significant phenotypic correlations with the subjectively assessed fleece traits. These were similar in sign, but smaller in magnitude than the corresponding genetic correlations. It is concluded that, with the exception of two or three traits, the subjectively assessed traits would not be negatively influenced when selection is based on the economically important production traits. It is, however, important that selection priorities be based on economic values of the traits. South African Journal of Animal Science Vol.32(2) 2002: 88-96
Transcriptome Profile at Different Physiological Stages Reveals Potential Mode for Curly Fleece in Chinese Tan Sheep  [PDF]
Xiaolong Kang, Gang Liu, Yufang Liu, Qinqin Xu, Ming Zhang, Meiying Fang
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0071763
Abstract: Tan sheep (Ovis aries), a Chinese indigenous breed, has special curly fleece after birth, especially at one month old. However, this unique phenotype disappears gradually with age and the underlying reasons of trait evolvement are still unknown. In this study, skin transcriptome data was used to study this issue. In total 51,215 transcripts including described transcripts and transfrags were identified. Pathway analysis of the top 100 most highly expressed transcripts, which included TCHH and keratin gene family members, such as KRT25, KRT5, KRT71, KRT14 and others, showed pathways known to be relevant to hair/fleece development and function. Six hundred differentially expressed (DE) transcripts were detected at two different physiological ages (one-month-old with curly fleece and 48-month-old without curly fleece) and were categorized into three major functional groups: cellular component, molecular function, and biological process. The top six functional categories included cell, cell part, cellular process, binding, intracellular, metabolic process. The detected differentially expressed genes were particularly involved in signal, signal peptide, disulfide bond, glycoprotein and secreted terms, respectively. Further splicing isoform analysis showed that the metallothionein 3 isoform was up-regulated in Tan lamb skin, indicating that it may be related to the conformation of curly fleece in Chinese Tan lamb. The hair-related important differentially expressed genes (SPINK4, FGF21, ESRα, EphA3, NTNG1 and GPR110) were confirmed by qPCR analysis. We deduced that the differences existed in expressed transcripts, splice isoforms and GO categories between the two different physiological stages, which might constitute the major reasons for explaining the trait evolvement of curly fleece in Chinese Tan sheep. This study provides some clues for elucidating the molecular mechanism of fleece change with age in Chinese Tan sheep, as well as supplying some potential values for understanding human hair disorder and texture changes.
Phenotypic and Genetic Changes of Ewe’s Economic Traits in the Lori-Bakhtiari Sheep Stud  [cached]
M. Vatankhah,M. A. Talebi,M. A. Edris
Journal of Science and Technology of Agriculture and Natural Resources , 2007,
Abstract: In this study 5025 records from the Lori-Bakhtiari sheep stud were used to predict phenotypic, genetic and environmental change in ewe traits from 1989 to 2004. Best linear unbiased prediction (BLUP) of breeding values were estimated by Drivative Free Restricted Maximum Likelihood (DFREML) procedure using single and multi-trait animal model. Phenotypic, genetic and environmental trends were calculated by regressing of the average phenotypic values, predicted breeding values and environmental values in the year of ewe birth respectively. The estimated phenotypic trends were –0.1223 kg for ewe body weight, -0.0415 kg for greasy fleece weight, 0.6639% for conception rate, 0.0003 for number of lambs born per ewe lambing, 0.0094 for number of lambs weaned per ewe lambing, 0.0380 kg for total birth weight per ewe exposed and 0.4227 kg for total weaning weight per ewe exposed. The estimated genetic trends were 0.0603 kg, -0.0004 kg, 0.0183%, -0.0012, -0.0007, 0.0030 kg and 0.0211 kg from single trait analysis and 0.0549 kg, -0.0006 kg, 0.0089%, -0.0008, -0.0008, 0.0030 kg and 0.0230 kg respectively from multi-trait analysis. The estimated phenotypic and environmental trends were significant but genetic trends were not significant (P
A genomics-informed, SNP association study reveals FBLN1 and FABP4 as contributing to resistance to fleece rot in Australian Merino sheep
Wendy JM Smith, Yutao Li, Aaron Ingham, Eliza Collis, Sean M McWilliam, Tom J Dixon, Belinda J Norris, Suzanne I Mortimer, Robert J Moore, Antonio Reverter
BMC Veterinary Research , 2010, DOI: 10.1186/1746-6148-6-27
Abstract: The majority of the DE genes originated from the fleece rot subtracted libraries and over-representing gene ontology terms included defense response to bacterium and epidermis development, indicating a role of these processes in modulating the sheep's response to fleece rot. We focused on genes that contribute to the physical barrier function of skin, including keratins, collagens, fibulin and lipid proteins, to identify SNPs that were associated to fleece rot scores.We identified FBLN1 (fibulin) and FABP4 (fatty acid binding protein 4) as key factors in sheep's resistance to fleece rot. Validation of these markers in other populations could lead to vital tests for marker assisted selection that will ultimately increase the natural fleece rot resistance of Merino sheep.Fleece rot (FR) is a bacterial dermatitis of the sheep skin and fleece caused by an overgrowth of the natural skin microflora following prolonged exposure to moisture [1,2]. FR is characterised grossly by bands of matted and often discoloured fibres along the mid-line of the animal over the neck, wither, mid-back and rump regions. Its severity ranges from bacterial discoloration causing coloured bands (water stain), to extensive gummy exudates (wool rot) causing bands of matted fibres [3]. Severe FR can cause weakening of wool substantially lowering wool quality and value. In addition to direct effects on fleece quality, FR is the most important predisposing factor to blowfly body strike, a form of blowfly strike, in eastern Australia. Inflammation and ulceration of the skin occurs at the FR affected site attracting blowflies which deposit eggs and providing moisture for the eggs to hatch and soluble protein for the freshly hatched larvae to feed on which can lead to severe tissue damage and death in extreme cases. Body strike causes significant losses annually as a result of increased chemical and labour costs and reduced production.Three host barriers have been identified that are involved in the de
Heritability estimates and correlations between subjectively assessed and objectively measured fleece traits in Merino sheep
P Naidoo, SWP Cloete, JJ Olivier
South African Journal of Animal Science , 2004,
Abstract: Data from 2801 individuals (born from 1996 to 2002) were used to obtain heritability (h2) estimates for five objectively measured and six linearly assessed type fleece traits (scored on a 1-50 point scale) from the Tygerhoek Merino flock. Correlations of the objective traits with the subjective traits were also derived. Estimates of h2 for the subjective traits accorded with literature estimates, and exceeded 0.2 for wool quality (0.31), wool colour (0.38), yolk (0.25), as well as belly and points (0.25). Corresponding h2 estimates amounted to 0.19 for regularity of crimp score and 0.13 for staple formation score. Genetic correlations of objective traits with subjective traits were either favourable or negligible in the majority of cases. The only exceptions were positive genetic correlations of fibre diameter (FD) and coefficient of variation of FD with staple formation score and belly and points score. Genetic progress in subjective traits thus appears possible, if desired in a selection strategy. South African Journal of Animal Science Supp 2 2004: 38-40
Norduz Goat of East Anatolia
I. Daskiran,F. Cedden
Journal of Animal and Veterinary Advances , 2012,
Abstract: Norduz goat is a breed of East-Anatolia localised in Gurpinar district of the province Van. There is neither research work nor documented information concerning this breed in Turkey. Although its origin is uncertain, Norduz goat is well known and distinguishable by breeders of Norduz Area. Main characteristics of Norduz goat are the favorable preweaning viability, the relatively high twinning rate and the milk production level as compared to other breeds of the region. The males have robust, long and upward horns. The females are seldom polled. Average adult body weight of females is 48 kg. Average weights at birth and weaning are respectively 2.7 and 18.4 kg for females, 3 and 21.1 kg for males; 3 and 20 kg for single born, 2.8 and 19.2 kg for twin born kids. Twinning rate is about to 30%. The principle colour of Norduz goat is black. Also, white, black-white, grey, roan and brown colour can be found. The average milk production in one lactation is not known. The basic product is milk which is used for cheese and butter production. The hair obtained from Norduz goat is a subsidiary product for producing regional and traditional goods, such as blankets, gloves and caps. There is a progressive decrease in the population of this goat, basically related to the decrease of the number of breeders, due to emigration to ci1ties. Some animal diseases, especially abortus can appear frequently in Norduz area.
Page 1 /100
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.