共查询到20条相似文献，搜索用时 234 毫秒
1.
不同杂交组合与世代5月龄羔羊产肉性能测定分析 总被引：1，自引：0，他引：1
对2.5月龄断奶的陶赛特羊×细毛羊、萨福克羊×阿勒泰羊、陶赛特羊×阿勒泰羊之杂交一、二代羔羊(DXF1、DXF2,SAF1、SAF2,DAF1、DAF2)与同龄的新疆细毛羊(XX)和阿勒泰羊(ALT)经60d的舍饲强度育肥后,选体重接近组内平均值者各5只进行屠宰试验,测定其产肉性能。结果表明:DAF1、SAF1、DAF2、SAF2育肥公羔的宰前活重、宰后1h胴体重、宰后48h胴体重与"无尾屠宰率"均明显高于ALT,证明引进纯种肉羊陶赛特羊、萨福克羊与本地肉羊杂交,具有明显改进胴体一级肉率,增加后腿肉重,提高净肉率、骨肉比,以及提高本地肉羊胴体眼肌面积、减小尾重的作用,且有随世代增加而提高的趋势。但其与XX杂交,除DXF1有明显的杂交优势外,有随杂交世代增加而降低产肉性能的趋势。此外,胴体熟化排酸过程(48h)对杂种肥羔和纯种肥羔的胴体重、屠宰率均有影响,分别下降0.5~2.2kg和0·03~6·00个百分点。 相似文献
2.
3.
4.
《中国草食动物科学》2021,(5)
为探索哈萨克羊不同杂交后代胴体及部分肉质性状的差异,选用20只6月龄的哈萨克羊,60只6月龄哈萨克羊不同杂交羔羊(杂交F_120只、级进F_220只、回交F_220只)进行屠宰试验,测定其体尺、体重、胴体重、背膘厚度、眼肌面积和尾脂重等屠宰性能。结果表明,杂交F_1和级进F_2羔羊体重均显著高于哈萨克羊羔羊(P0.05)。级进F_2羔羊胸围均显著高于哈萨克羊、杂交F_1、回交F_2羔羊(P0.05)。杂交F_1羔羊胴体重显著高于哈萨克羊(P0.05)。尾脂重哈萨克羊羔羊杂交F_1羔羊级进F_2羔羊回交F_2羔羊,各组之间均差异显著(P0.05);屠宰率与胴体重、眼肌面积间均呈极显著正相关(P0.01),背膘厚度与GR值、尾脂肪呈极显著正相关(P0.01),眼肌面积与尾脂重均呈极显著负相关(P0.01)。 相似文献
5.
6.
选用2.5月龄、体重相近、健康无病的断奶道赛特×阿勒泰(DAF1、DAF2)、萨福克×阿勒泰(SAF1、SAF2)杂交一、二代公羔各15只,阿勒泰羊(ALT)10只进行60d育肥试验。试验结果表明:SAF1、DAF1日增重为269g和262g,分别比ALT提高24.54%、21.30%,差异极显著(P<0.01);SAF2、DAF2日增重为258g和254g,分别比ALT提高19.44%、17.59%,差异显著(P<0.05),SAF1、DAF1、SAF2、DAF2日增重相互间差异不显著(P>0.05);育肥期内,每只杂交羊纯增直接经济收入分别比ALT多30.42、32.95、28.12、30.21元。 相似文献
7.
为了全面了解杜泊羊与湖羊级进杂交效果，试验选择纯种杜泊羊作为父本，分别与湖羊(杜×湖杂交组，后代记为杜湖F1代)、杜湖F1代(杜×F1代杂交组，后代记为杜湖F2代)、杜湖F2代(杜×F2代杂交组，后代记为杜湖F3代)进行杂交，以湖羊纯繁组、杜泊羊纯繁组为对照，观察各组后代羔羊体型外貌，测定各组母羊的繁殖性能(包括产羔数、产活羔数、产双羔数、产多羔数、产羔率、羔羊成活率、产双羔率、产多羔率)及后代羔羊的生产性能(羔羊初生重及1,2,3,6月龄体重和1～6月龄平均日增重，6月龄羔羊体长、体高和胸围体尺指标)、屠宰性能[宰前体重、胴体重、屠宰率、眼肌面积、胴体脂肪含量(GR值)]、免疫指标[免疫球蛋白(Ig)A、IgM、IgG、白细胞介素(IL)和干扰素(IFN)]、肉品质(pH45 min值、pH24h值、肉色、大理石纹、失水率、熟肉率、剪切力)和羊肉胴体感官评定(胴体特点、胴体重量、肥度、肉脂硬度、肌肉发育程度、肉脂色泽、适宜烹饪方式)。结果表明：随着杂交代数的增加，羔羊体型外貌明显趋向杜泊羊。杜×F1代杂交组、杜×F2代杂交组和杜泊羊纯繁组母... 相似文献
8.
以引进的乌骨羊为父本与湖羊进行杂交,通过分析乌湖杂交一代羊的体貌特征、抗逆性、生长发育、屠宰性能以及繁殖性能,对其杂交效果进行了全面评估。结果显示:乌湖杂交一代羊体貌特征趋向于父本乌骨羊;抗逆、抗病能力强;初生、1月龄、2月龄、3月龄、6月龄、12月龄体重及日增重均极显著高于乌骨羊(P<0.01);初生体高、胸围均极显著高于乌骨羊(P<0.01),体斜长差异不显著(P>0.05);3月龄、6月龄、12月龄体高、体斜长、胸围均极显著高于乌骨羊(P<0.01);性成熟较乌骨羊早1~2个月,初配年龄早2~3个月,受胎率差异不大,产羔率提高72.5%,初产母羊胎次产羔数达1.7只;宰前活重、胴体重、骨重、净肉重、尾脂重均极显著高于乌骨羊(P<0.01);屠宰率、净肉率均显著高于乌骨羊(P<0.05);肉骨比差异不显著(P>0.05)。说明乌湖杂交一代羊抗病能力强、生长速度快、繁殖性能好、肉用体型佳,杂种优势明显,可作为理想的杂交组合。 相似文献
9.
以塔什库干大尾绵羊为父本、新疆兵团农三师两个山区牧场本地绵羊为母本进行杂交试验。试验结果显示 ,其F1羔羊初生、4月龄、8月龄体重分别平均高于本地绵羊羔 2 8%～ 3 3 %、17%～ 3 0 %、2 9%～ 3 3 %,差异极显著 (P <0 0 1) ;8月龄公、母羊平均宰前活重、胴体重分别平均高于本地绵羊 2 9%～ 3 3 %、5 3 %～ 60 %;屠宰率、净肉率分别高于本地羊 7～ 8个百分点和 5 7～ 6 4个百分点 ,杂交改良羊的产肉性能明显 相似文献
10.
欧拉型藏羊屠宰试验 总被引：10，自引：3，他引：7
毛学荣 《青海畜牧兽医杂志》2005,35(3):9-10
试验结果表明,青海省河南县10月龄羔羊宰前活重和胴体重分别达到38．3kg和15．97kg,1．5岁羯羊的宰前活重、胴体重和屠宰率,分别达到47kg,23．2kg和46．7％;1．5岁欧拉羊心脏、肺脏重分别为0．29kg和0．69kg,明显大于同龄藏羊(0．2kg,0．49kg),说明欧拉羊对缺氧的严酷环境具有很好的适应能力。 相似文献
11.
相同试验条件下，选用SAF1、DAF1和SAF2、DAF2 2.5月龄早期断奶羔羊各15只进行60 d育肥试验。结果表明：SAF1、DAF1日增重为269和262 g，分别比ALT提高24.54%、21.30%，差异极显著（P<0.01）；SAF2、DAF2日增重为258和254 g，分别比ALT提高19.44%、17.59%，差异显著（P<0.05），SAF1、DAF1、SAF2、DAF2日增重相互间差异不显著（P>0.05）；育肥期内，每只杂交羊纯增直接经济收入分别比ALT多30.42、32.95、28.12、30.21元。 相似文献
12.
Liméa Léticia Bocage Bruno Arquet Rémy Mahieu Maurice Alexandre Gisele 《Tropical animal health and production》2010,42(3):507-514
Carcass data base of 164 Creole male goats was used in order to provide factual data on the carcass conformation. Standardised
procedures of carcass measuring and cutting were followed. The European official grid of light lamb is implemented for meat
goat in the French West Indies and included five levels. Weights of carcass, cuts and tissues, quality scores and linear measurements
were analysed. Feeding system, age at slaughter and weight were taken into account for statistical analysis. There were significant
differences among carcass conformation classes (CC) for many traits except for the fat score, leg length and compactness ratio
(carcass width on length): 2.2, 34.5 cm and 0.30 on average, respectively. The values of chilled carcass weight and yield
and the carcass linear measurements steadily increased until conformation class 4 or 5: 6.7 to 11.2 kg, 49% to 55% and 52.4
to 58.0 cm carcass length. For the weights of carcass cuts, significant differences appeared between two groups: classes 1
and 2 vs. classes 3, 4 and 5. Regardless of the carcass weight, the distribution of prime cuts remained similar. The indices
calculated on a weight basis (kg/cm), either for the carcass or the leg, increased significantly (P < 0.01): with 54% and 63% difference between the two extreme classes, respectively. The muscle, bone and fat proportions
in the shoulder did not vary between CC with 0.72, 0.22 and 0.06, respectively. Corresponding traits in leg were 0.74, 0.23
and 0.03; the last two were different (P < 0.05) from class 1 to class 5. The muscle/bone ratios calculated either in shoulder or in leg ranged from 3.1 to 3.6 (P > 0.05). 相似文献
13.
年龄和性别对陶赛特×小尾寒羊F1代羔羊屠宰性能与肉品质的影响 总被引：7，自引：5，他引：2
试验旨在探讨年龄和性别对陶×寒F1羔羊肉用性能及肉品质的影响。选取同等饲养条件下的7月龄陶×寒F1公羔、母羔;13月龄陶×寒F1公羔各5只,研究其屠宰性能和肉的食用品质。结果表明,13月龄羔羊的宰前活重、胴体重比7月龄高41.85%、56.51%（P<0.01）,屠宰率显著高于7月龄（P<0.05）,13月龄羔羊的屠宰性能高于7月龄。产肉力指标上13月龄羔羊的瘦肉重、眼肌面积、肉骨比较7月龄高30.40%、30.04%（P<0.01）、15.56%（P<0.05）。13月龄羔羊肥肉重、GR值比7月龄高117.23%、263.40%（P<0.01）。肉品质方面,13月龄羔羊背最长肌剪切力值、滴水损失率、胶原蛋白含量、肌纤维直径均显著高于7月龄（P<0.05）。公羔的宰前活重、胴体重比母羔高11.96%、14.36%（P<0.05）,表明7月龄时公羔屠宰性能高于母羔,肉品质指标无显著差异。因此,陶×寒F1羔羊的屠宰性能和肉品质明显受年龄、性别的影响。 相似文献
14.
S G May W L Mies J W Edwards F L Williams J W Wise J B Morgan J W Savell H R Cross 《Journal of animal science》1992,70(8):2431-2445
Commercial slaughter steers (n = 329) and heifers (n = 335) were selected to vary in slaughter frame size and muscle thickness score, as well as carcass adjusted 12th-rib fat thickness. After collection of USDA carcass grade data, one side of each carcass was fabricated into boneless primals, subprimals, and minor tissue components. Cuts were trimmed to 2.54, 1.27, and .64 cm of external fat, except for the knuckle, tri-tip, and tenderloin, which were trimmed of all fat. Forced four-variable regression equations were used to predict the percentage (chilled carcass weight basis) yield of boneless subprimals at the three fat trim levels as influenced by sex class, frame size, muscle score, and adjusted 12th-rib fat thickness. Independent variables that had the most influence on percentage yield of primals and boneless subprimals were adjusted 12th-rib fat thickness and sex class. Within the same phenotypic group, percentage of trimmable fat increased by 2.32% as 12th-rib fat thickness increased by .75 cm. Estimated percentage yield of the major subprimals from the loin and round tended to be higher or relatively equal for heifer carcasses at all trim levels compared with those subprimals from steer carcasses. Holding frame size, sex class, and fat thickness constant, there was a higher percentage yield of chuck roll, rib eye roll, and strip loin for carcasses from thick-muscled cattle than for those from average- and thin-muscled cattle. Frame size had little effect on percentage yield of boneless subprimals. 相似文献
15.
Maternal grandsire,granddam, and sire breed effects on growth and carcass traits of crossbred cattle
Postweaning growth, feed efficiency, and carcass traits were analyzed on 1,422 animals obtained by mating F1 cows to F1 (Belgian Blue x British breeds) or Charolais sires. Cows were obtained from mating Hereford, Angus, and MARC IIIHereford, 1/4 Angus, 1/4 Pinzgauer, and 1/4 Red Poll) dams to Hereford or Angus (British breeds), Tuli, Boran, Brahman, or Belgian Blue sires. Breed groups were fed in replicated pens and slaughtered serially in each of 2 yr. Postweaning average daily gain; live weight; hot carcass weight; fat depth; longissimus area; estimated kidney, pelvic, and heart fat (percentage); percentage Choice; marbling score; USDA yield grade; retail product yield (percentage); retail product weight; fat yield (percentage); fat weight; bone yield (percentage); and bone weight were analyzed in this population. Quadratic regressions of pen mean weight on days fed and of cumulative ME consumption on days fed were used to estimate gain, ME consumption and efficiency (Mcal of ME/kg of gain) over time (0 to 200 d on feed), and weight (300 to 550 kg) intervals. Maternal grandsire breed was significant (P < 0.01) for all traits. Maternal granddam breed (Hereford, Angus, or MARC III)was significant (P < 0.05) only for fat depth, USDA yield grade, retail product yield, fat yield, fat weight, and bone yield. Sire breed was significant (P < 0.05) for live weight, hot carcass weight, longissimus area, and bone weight. Sex class was a significant (P < 0.001) source of variation for all traits except for percentage Choice, marbling score, retail product yield, and fat yield. Interactions between maternal grandsire and sire breed were nonexistent. Sire and grandsire breed effects can be optimized by selection and use of appropriate crossbreeding systems. 相似文献
16.
为了促进广西隆林山羊杂交改良技术的应用,提高隆林山羊的生产效益,本研究以努比亚山羊、隆林山羊及努隆杂交F1代（努比亚山羊♂×隆林山羊♀）为研究对象,所有山羊都在相同水平下进行饲养管理,选取3个群体共205只山羊,分别对1、3、6月龄山羊的生产性能及体尺指标进行测定,选取6只6月龄的父母代及杂交F1代进行屠宰,取其背最长肌进行肉品质分析。结果表明,努隆杂交F1代经产母羊的产羔率、羔羊成活率与父母代差异不显著（P>0.05）,初生重、不同月龄体尺指标与父母代差异极显著（P<0.01）,努隆杂交F1代宰前活重、胴体重、净肉重、屠宰率、净肉率较隆林山羊都有显著提高（P<0.05）,肌肉粗蛋白质含量、肌内脂肪含量、必需氨基酸、风味氨基酸、游离脂肪酸与父母代均有不同程度的提高。因此,努比亚山羊在改善隆林山羊体型、生长速度和肉品质上综合表现良好。 相似文献
17.
用特克赛尔公羊改良蒙哈混血羊,杂种羊与本地羊在同样饲养管理条件下,特×蒙哈杂一代6月龄羔羊的宰前活重较同龄蒙哈混血羊高12.24 kg,胴体重高6.66 kg,净肉重高5.87 kg,差异均极显著(P＜0.01)。后腿肉重增加1.67 kg,眼肌面积增加8.13 cm2,为蒙哈混血羊的1.80倍,差异显著(P＜0.05)。特×蒙哈杂一代胴体重达到国外上等羔羊肉胴体重标准,优质肉率、骨肉比均高于蒙哈混血羊,肉质较细嫩,羊肉品质得到改善。每只杂种羊仅产肉一项比本地羊多收入168.60元,经济效益明显。说明利用特克赛尔羊改良蒙哈混血羊,对提高产肉性能、改善羊肉品质和增加养羊经济效益具有明显的效果。 相似文献
18.
S G May W L Mies J W Edwards F L Williams J W Wise J J Harris J W Savell H R Cross 《Journal of animal science》1992,70(11):3311-3316
Commercial slaughter steers (n = 329) and heifers (n = 335) were selected to vary in slaughter frame size and muscle thickness score, as well as adjusted 12th rib fat thickness. After USDA carcass grade data collection, one side of each carcass was fabricated into boneless primals/subprimals and minor tissue components. Cuts were trimmed to 2.54, 1.27, and .64 cm of external fat, except for the bottom sirloin butt, tritip, and tenderloin, which were trimmed of all fat. Four-variable regression equations were used to predict the percentage (chilled carcass weight basis) yield of boneless subprimals at different fat trim levels (.64, 1.27, and 2.54 cm) as influenced by sex class, frame size, muscle score, and adjusted 12th rib fat thickness. Carcass component values, total carcass value, carcass value per 45.36 kg of carcass weight, and live value per 45.36 kg of live weight were calculated for each phenotypic group and external fat trim level. Carcass fatness and muscle score had the most influence on live and carcass value (per 45.36 kg weight basis). Carcasses with .75 and 1.50 cm of fat at the 12th rib were more valuable as the trim level changed from 2.54 cm to .64 cm; however, for carcasses with 2.25 cm of fat at the 12th rib, value was highest at the 2.54 cm trim level. Value was maximized when leaner cattle were closely trimmed. There was no economic incentive for trimming light-muscled or excessively fat carcasses to .64 cm of external fat. 相似文献
19.
本试验旨在研究冬季不同舍饲密度对育肥羊屠宰性能及肉品质的影响.选用6月龄健康的阿勒泰大尾羊杂交1代断奶羔羊144只,随机分为4组,每组36只,试验1～4组每只羊占地面积分别为0.35、0.70、1.05和1.40 m2.试验期45 d.结果表明,不同舍饲密度育肥羊的胴体重、屠宰率、净肉重、净肉率具有相同的变化规律,均表现为:试验1组<试验2组<试验3组<试验4组,其中,试验4组胴体重、屠宰率、净肉重、净肉率较试验1组分别显著提高20.65%、11.00%、30.40%和19.73%(P<0.05);4个试验组肉色都在3～4分之间,均属羊肉正常颜色;大理石纹均在1～1.1分之间,试验1组pH最低、剪切力最高,嫩度较差.综上所述,在本试验条件下,以低密度(1.40 m2/只)饲养的育肥羊在屠宰性能和肉品质方面表现较好,以高密度(0.35 m2/只)饲养的育肥羊产肉能力和肉品质较差. 相似文献
20.
Cunha BC Belk KE Scanga JA LeValley SB Tatum JD Smith GC 《Journal of animal science》2004,82(7):2069-2076
This study was performed to validate previous equations and to develop and evaluate new regression equations for predicting lamb carcass fabrication yields using outputs from a lamb vision system-hot carcass component (LVS-HCC) and the lamb vision system-chilled carcass LM imaging component (LVS-CCC). Lamb carcasses (n = 149) were selected after slaughter, imaged hot using the LVS-HCC, and chilled for 24 to 48 h at -3 to 1 degrees C. Chilled carcasses yield grades (YG) were assigned on-line by USDA graders and by expert USDA grading supervisors with unlimited time and access to the carcasses. Before fabrication, carcasses were ribbed between the 12th and 13th ribs and imaged using the LVS-CCC. Carcasses were fabricated into bone-in subprimal/primal cuts. Yields calculated included 1) saleable meat yield (SMY); 2) subprimal yield (SPY); and 3) fat yield (FY). On-line (whole-number) USDA YG accounted for 59, 58, and 64%; expert (whole-number) USDA YG explained 59, 59, and 65%; and expert (nearest-tenth) USDA YG accounted for 60, 60, and 67% of the observed variation in SMY, SPY, and FY, respectively. The best prediction equation developed in this trial using LVS-HCC output and hot carcass weight as independent variables explained 68, 62, and 74% of the variation in SMY, SPY, and FY, respectively. Addition of output from LVS-CCC improved predictive accuracy of the equations; the combined output equations explained 72 and 66% of the variability in SMY and SPY, respectively. Accuracy and repeatability of measurement of LM area made with the LVS-CCC also was assessed, and results suggested that use of LVS-CCC provided reasonably accurate (R2 = 0.59) and highly repeatable (repeatability = 0.98) measurements of LM area. Compared with USDA YG, use of the dual-component lamb vision system to predict cut yields of lamb carcasses improved accuracy and precision, suggesting that this system could have an application as an objective means for pricing carcasses in a value-based marketing system. 相似文献