The growth and survival characteristics of lambs produced by commercial crossbreeding Kıvırcık ewes with F2 rams with the German Black-Headed Mutton genotype (original) (raw)
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Ankara Üniversitesi Veteriner Fakültesi Dergisi, 2015
In this study, the data were collected from 1271 heads of Awassi lambs raised in the GAP International Agricultural Research and Training Center in Diyarbakır, Turkey. Birth and weaning weight (at 90 days) of lambs were measured and average daily weight gain from birth to weaning was calculated. The effect of the years and season of lambing, age of dam, sex and birth type on birth weight (BWT), weaning weight (WWT) and average daily weight gain (ADWG) from birth to weaning were investigated. Overall means were 4.81±0.022 kg for BWT, 22.99±0.196 kg for WWT and 201.67±1.173 g for ADWG. The all tarits in the analyses were significantly (P<0.05) affected by all factors in the model. In addition, lambs born heavier grew faster and reached heavier WWT (p<0.01). Based on the single and multiple trait analyses, heritability estimates ranged from 0.21 to 0.25 for BWT, from 0.13 to 0.17 for WWT and from 0.13 to 0.17 for ADWG. Estimates of genetic correlations between BWT with WWT and ADWG were 0.61 and 0.61, respectively.
Kafkas Universitesi Veteriner Fakultesi Dergisi, 2012
In this study, canonical correlation analysis was applied to estimate the relationship between six different morphologic traits (X set-birth weight (BW), body length (BL), height at withers (HW), chest depth (CD), chest width (CW) and chest girth (CG)) measured at birth and the morphological traits measured at weaning time (Y set-weaning weight (WW), body length (BL_W), height at withers (HW_W), chest depth (CD_W), chest width (CW_W) and chest girth (CG_W)) measured from 121 Karayaka lambs, raised at Gaziosmanpasa University. First of estimated six different canonical correlation coefficients (CCC) (r=0.668) between the pairs of canonical variables were found significant (P<0.05). The results of canonical correlation analysis indicated that height at withers, chest girth and birth weight had largest contribution for the explanatory capacity of canonical variables estimated from the morphologic traits of Karayaka lambs at the birth when compared with other body measurements. Height withers and chest girth had largest contribution for the explanatory capacity of canonical variables estimated from the morphological traits of the lambs at the weaning time when compared with other body measurements. As results of this study showed that height at withers, body weight and chest girth measured at birth can be used as early selection criteria for genetic improvement in Karayaka lambs.
Czech J. Anim. Sci, 2002
e objective of this study was to evaluate the effect of crossing on body weight and growth ability of lambs from birth to weaning, including the effect of litter size, sex, dam age, dam weight at mating, dam weight after lambing and year of rearing. e study was conducted on the Awassi sheep flock and their crossbreds with Charollais and Romanov breeds maintained at the Agriculture Centre for Research and Production at Jordan University of Science and Technology, Irbid. In 1999 and 2000 the live weight was determined in 192 lambs (70 Awassi, 63 Awassi × Charollais F 1 crossbred and 59 Awassi × Romanov F 1 crossbred) at birth and subsequently every fortnight until weaning by weighing on digital scales to the nearest 0.1 kg. Average live weight of lambs at birth was 4.20 ± 1.15 kg and at the age of 15, 30, 45 and 60 days 8.72 ± 2.12 kg, 12.12 ± 2.77 kg, 15.50 ± 3.70 kg and 19.27 ± 4.59 kg, respectively. ADG of lambs from birth until weaning was 248 ± 0.07 g. Genotype of lambs and litter size affected ADG, live weight of lambs at birth, 15, 30, 45 and 60 days significantly (P ≤ 0.05-0.001). Investigations of the effect of sex on live weight of lambs at birth and at 60 days showed that the differences between males and females were statistically significant (P ≤ 0.05-0.01). Differences in ADG and live weight at 15, 30 and 45 days according to dam age were significant (P ≤ 0.05-0.01). e effect of dam weight at mating on live weight of lambs at birth, ADG until weaning and live weight at weaning was not confirmed. e effect of dam weight at lambing on ADG, live weight of lambs at birth, at 45 days of age and until weaning was not confirmed. Regressions of BW, ADG and weight at 15, 30, 45 and 60 days age of lambs on dam weight after lambing were significant (P ≤ 0.001). Likewise, live weight of lambs at birth, ADG until weaning and live weight at 15, 30 a 45 days of age were affected by the seasons of lambing (P ≤ 0.01-0.001).
İ: Effects of different fattening systems on fattening performance, slaughter and carcass characteristics of male Tuj lambs. Abstract The purpose of this study were to determine effects of fattening systems on fattening performance (n=39) and slaughter and carcass characteristics (n=24) in male Tuj lambs. Three different fattening groups were formed as extensive (n=13), semi-intensive (n=13) and intensive (n=13). Lambs in the extensive group were grazed in pasture. In addition to pasture, concentrated feed was given to lambs in the semi-intensive group. High quality fodder and concentrated feed were given to those in the intensive group. The study was completed in 90 d. Final live weights of extensive, semi-intensive and intensive groups were 31.19, 41.22, and 40.56 kg (P<0.001), respectively, and for daily live weight gain were (DLWG) 117.52, 229.66, and 221.11 g (P<0.001), respectively. Feed conversion rates (FCR) were 3.05 and 5.16 respectively in the semi-intensive and intensive fattening. It was found that hot carcass weight was 13.41, 19.51, and 19.89 kg (P<0.001) in extensive, semi-intensive, and intensive fattening groups respectively. Hot carcass yield was 43.11, 46.95, and 49.77% (P<0.001) in extensive, semi-intensive, and intensive fattening groups respectively. Consequently; leg, foreleg, shoulder, neck, flank, and kidney percentages, and spleen and full stomach weights of lambs in the extensive group were higher than in semi-extensive and entensive groups. Although there was no statistical difference between semi-extensive and entensive groups in respect to fattening performance, slaugher weight, hot and cold carcass weights, entensive group was higher than the other groups in respect to hot and cold carcass yield. Özet Bu araştırma, erkek Tuj kuzularında besi sistemlerinin besi performansı (n=39), kesim ve karkas özelliklerine (n=24) etkisini belirlemek amacıyla yapılmıştır. Araştırmada ekstansif (n=13), yarı entansif (n=13) ve entansif (n=13) olmak üzere 3 değişik besi gruba oluşturulmuştur. Ekstansif grup merada otlatılmıştır. Yarı entansif gruba meraya ilaveten konsantre yem verilmiştir. Entansif gruba ise kaliteli kuru ot ve konsantre yem verilmiştir. Araştırma 90 günde tamamlanmıştır. Ekstansif, yarı entansif ve entansif besi gruplarında besi sonu ağırlığı sırasıyla 31.19, 41.22 ve 40.56 kg (P<0.001), günlük canlı ağırlık artışı sırasıyla 117.52, 229.66 ve 221.11 g (P<0.001) olarak belirlenmiştir. Yarı entansif ve entansif beside yemden yararlanma oranı sırasıyla 3.05 ve 5.16 olarak tespit edilmiştir. Ekstansif, yarı entansif ve entansif beside sıcak karkas ağırlığı 13.41, 19.51 ve 19.89 kg (P<0.001) olarak belirlenmiştir. Sıcak karkas randımanı aynı sıra ile %43.11, 46.95 ve 49.77 (P<0.001) olarak tespit edilmiştir. Sonuç olarak; ekstansif besi grubundaki kuzuların but, kol, omuz, boyun, etek ve böbrek oranları ile dalak ve dolu mide ağırlığı, yarı entansif ve entansif besi gruplarından yüksek bulunmuştur. Yarı entansif ve entansif gruplar arasında besi performansı, kesim ağırlığı, sıcak ve soğuk karkas ağırlıkları bakımından istatistiki bir fark bulunmamasına rağmen, sıcak ve soğuk karkas randımanı bakımından entansif grup, diğer gruplardan yüksek belirlenmiştir.
2002
e goal of the study was to examine and evaluate the effect of lamb genotype on the growth, feed consumption, feed conversion and carcass value of Awassi ram lambs, F 1 crossbreds of Romanov × Awassi and Charollais × Awassi. Average daily weight gain and total weight gain during the trial were 199 ± 0.01 g and 12.33 ± 0.58 kg in pure Awassi ram lambs, 216 ± 0.01 g and 13.37 ± 0.71 kg in F 1 crossbreds A × Ch and 268 ± 0.01 g and 16.66 ± 0.58 kg in F 1 crossbreds A × R (P ≤ 0.01). Statistically significant differences between the genotypes were found in diagonal body length, rump height and chest girth (P ≤ 0.01). Evaluation of carcass by-products shows that the genotype affected the weight of full and empty digestive tracts, small intestine, heart, liver, intestinal fat, testicles, kidney and kidney fat (P ≤ 0.05 -0.01). e highest dressing percentage (including fat tail) in warm condition was 50.93 ± 1.11% in Awassi ram lambs and if compared with F 1 crossbred A × Ch 50.34 ± 1.36% and F 1 crossbreeds A × R 49.05 ± 1.11% no statistically significant difference was found. e highest percentage ratios of leg, loin and rack, which represent the prime meat of carcass, 57.08 ± 1.72% were in F 1 crossbreds A × Ch, 54.14 ± 1.40% in F 1 crossbreds A × R and 48.99 ± 1.40% in Awassi ram lambs (P ≤ 0.001). e highest fat tail percentage 13.4 ± 1.06% was in Awassi ram lambs and the lowest 1.76 ± 1.06% in F 1 crossbreds A × R (P ≤ 0.001). In general, the results of this study demonstrated that F 1 crossbreeds A × R and F 1 crossbreds A × Ch were superior to Awassi ram lambs in daily weight gain and total weight gain, feed conversion, lower costs per 1 kg meat gain and mainly in the carcass indicators.
Turkish Journal of Veterinary and Animal Sciences
The purpose of this study was to compare the fattening performance, slaughter and carcass characteristics of lambs which were produced by crossbreeding with Kivircik sheep, the local breed in the Marmara region with German Black-Headed Mutton (GBM), the mutton breed which import from Germany. Forty lambs, the live weights of which were around 25.0 kg, were divided into 4 groups according to genotype and sex at the beginning of the fattening period. The average daily live gains were found 279, 210, 283 and 201 day/g, and fed conversion efficiencies were 5.018, 6.286, 4.854 and 6.197 kg, respectively in genotype groups of the Bandirma-I male, female, the Bandirma-II male and female lambs. The crossbred male lambs gained weight faster and consumed less feed per unit weight gain during the fattening program than the female lambs. Whereas, there were no fattening and carcass traits differences between crossbreds Bandirma-I and Bandirma-II genotype lambs.
South African Journal Of Animal Science
In this study the possibilities of using the Ile de France x Akkaraman (G1) genotype (IDFAG1) in improving the growth performance and carcass characteristics of fat-tailed Karakas sheep raised in rural farm conditions in the Van Region of Eastern Anatolia, Turkey, were investigated. The aim was to obtain some preliminary results for future studies which will be designed to develop a genotype which has the ability to adapt to the region’s conditions, has a high yield and quality meat, grows fast, has a high feed conversion ability and a thin fat tail. Growth and feedlot performances and carcass characteristics of Karakas (KAR) and crossbred (IDFAK) lambs obtained from the mating of IDFAG1 rams with Karakas ewes were evaluated. A total of 97 KAR and IDFAK lambs reared under farm conditions was evaluated for growth characteristics. For the evaluation of feedlot performance and carcass characteristics, 10 KAR and seven IDFAK single-born male lambs weaned at two months of age were subjec...
The aim of study was to investigate the carcass quality of Turkish Merino, Ramlic, Kivircik, Chios and Imroz breeds in north-western Turkey under an intensive production system. After weaning at approximately 85 days of age, 46 lambs from Turkish Merino, Ramlic, Kivircik, Chios and Imroz breeds were fattened for 56 days. slaughter weights were 47. 39, 45.68, 47.27, 31.08 and 29.82 kg and chilled carcass weights were 23. 35, 22.33, 23.51, 14.33 and 13.75 kg, respectively (P<0.001). Improved Turkish Merino and Ramlic and indigenous Kivircik lambs had higher carcass measurements than indigenous Chios and Imroz lambs. Chios lamb carcasses had the highest tail root fat yellowness and tail percentage while having the lowest fatness score, omental and mesenteric fat percentage and kidney knob and channel fat percentage. Turkish Merino lambs had higher shoulder percentage, lean percentage and lean/total fat ratio in the hind leg and produced less total fat in the hind leg than Ramlic and Kivircik lambs. These results indicate that improved Turkish Merino might be used to produce high quality lamb carcasses in north-western Turkey. Among indigenous breeds Kivircik showed an outstanding carcass production performance. Lo scopo di questo studio è stato quello di rilevare le caratteristiche qualitative delle carcasse in razze Turkish Merino, Ramlic, Kivircik, Chios e Imroz allevate con sistema intensivo nel territorio del nord-ovest della Turchia. Dopo lo svezzamento a circa 85 giorni di età, 46 agnelli di razza Turkish Merino, Ramlic, Kivircik, Chios e Imroz sono stati ingrassati per 56 giorni. Il peso alla macellazione è stato di 47,39 -45,68 -47,27 -31,08 e 29,82 kg, e quello delle carcasse refrigerate di 23, 35 -22,33 -23,51 -14,33 e 13,75 Ital.664