棉籽浓缩蛋白营养价值评定及其对断奶仔猪生长性能的影响

本研究旨在评价棉籽浓缩蛋白的营养价值及其替代大豆浓缩蛋白对断奶仔猪生长性能、营养物质消化率和血清生化指标的影响。试验1：将12头生长猪随机分成2组（每组6个重复，每个重复1头猪），分别饲喂玉米基础饲粮和棉籽浓缩蛋白饲粮。采用全收粪尿法和套算法测定棉籽浓缩蛋白的消化能和代谢能。试验2：将12头生长猪随机分成2组（每组6个重复，每个重复1头猪），分别饲喂无氮饲粮和棉籽浓缩蛋白饲粮。采用指示剂法和直接法测定棉籽浓缩蛋白的粗蛋白质和氨基酸标准回肠消化率。试验3：将192头断奶仔猪随机分成4组（每组6个重复，每个重复8头猪），分别饲喂棉籽浓缩蛋白水平为0、2%、4%和6%（等量替代大豆浓缩蛋白）的试验饲粮，试验期28 d。结果表明：1）风干基础下棉籽浓缩蛋白消化能、代谢能和总能消化率分别为16.51 MJ/kg、15.38 MJ/kg和89.78%。2）棉籽浓缩蛋白的粗蛋白质和氨基酸标准回肠消化率89%和75%～94%。3）不同添加水平的棉籽浓缩蛋白替代大豆浓缩蛋白对断奶仔猪生长性能、营养物质消化率及血清生化指标均没有显著影响（P>0.05）。由此可见，棉籽浓缩蛋白在断奶仔猪饲粮中可以完全...     

产朊假丝酵母对断奶仔猪生长性能、血清免疫和抗氧化指标以及养分表观消化率的影响

本试验旨在探究产朊假丝酵母作为蛋白质饲料原料对断奶仔猪生长性能、血清免疫和抗氧化指标以及养分表观消化率的影响,为其推广及合理利用提供依据。试验选用96头28日龄初始体重为(7.90±1.65) kg的健康“杜×长×大”断奶仔猪,随机分为4个组,每组6个重复,每个重复4头猪(公母各占1/2)。对照组饲喂由含发酵豆粕、酵母水解物和鱼粉组成的基础饲粮,试验组分别饲喂用由产朊假丝酵母发酵而成的酵母蛋白Ⅰ替代基础饲粮中3%酵母水解物(试验Ⅰ组)、酵母蛋白Ⅰ替代基础饲粮中3%鱼粉(试验Ⅱ组)以及酵母蛋白Ⅱ替代基础饲粮中5%发酵豆粕(试验Ⅲ组)的饲粮。试验期21 d。结果表明：1)与对照组相比,各试验组断奶仔猪平均日增重、平均日采食量、料重比以及腹泻率均无显著差异(P>0.05)。2)与对照组相比,试验Ⅱ组断奶仔猪血清白细胞介素-10含量显著降低(P<0.05),血清谷胱甘肽过氧化物酶和超氧化物歧化酶活性显著提高(P<0.05)。3)与对照组相比,试验Ⅱ组断奶仔猪干物质、有机物、组蛋白质、粗脂肪和中性洗涤纤维表观消化率显著降低(P≤0.05)。4)与对照组相比,试验Ⅱ组断奶仔猪粪便...     

大豆浓缩蛋白替代鱼粉、乳清粉饲喂断奶仔猪试验

大豆浓缩蛋白是脱除大豆中的可溶性糖分和多种抗营养因子的大豆蛋白制品,具有低抗原性和粗蛋白质含量高等优点。本试验用大豆浓缩蛋白部分或完全替代断奶仔猪饲粮中的乳清粉和鱼粉,观察其使用效果。大豆浓缩蛋白由秦皇岛金海食品工业有限公司提供,粗蛋白质含量68.70%,售价7元/kg。选择35日龄断奶,体重8.8kg左右的断奶1天的杜×长×大三元杂种猪96头,随机分为对照组、试验1组、试验2组,每组32头,每组4个重复,每重复8头猪。对照组饲喂基础饲粮;试验1组饲喂用大豆浓缩蛋白部分替代鱼粉、乳清粉的饲粮;试验2组饲喂用大豆浓缩蛋白完全替代鱼粉、…     

不同蛋白质源组合饲粮对断奶仔猪生长性能和血清生化指标的影响

本试验旨在研究不同蛋白质源组合代替基础饲粮中的血浆蛋白粉对断奶仔猪生长性能和血清生化指标的影响。选择日龄和体重相近的断奶仔猪200头,随机分为5组,每组4个重复,每个重复10头仔猪,试验分为教槽阶段和保育阶段。教槽阶段(21～33日龄):对照组饲喂含4%血浆蛋白粉的基础饲粮,试验组分别饲喂含3%小麦水解蛋白+2%进口酵母提取物(Ⅰ组)、5%酪蛋白(Ⅱ组)、3%大豆分离蛋白+2%进口酵母提取物(Ⅲ组)和3%大豆分离蛋白+2%国产酵母提取物(Ⅳ组)的试验饲粮,试验期12 d。保育阶段(34～55日龄):教槽阶段试验结束后,5组均饲喂同一种保育料,试验期21 d。结果表明:1)教槽和保育阶段,各试验组的平均日采食量(除教槽阶段试验Ⅰ组外)、料重比和腹泻率与对照组相比差异均不显著(P>0.05);教槽阶段,试验Ⅰ组的平均日增重显著低于对照组(P<0.05),而试验Ⅲ组的平均日增重显著高于对照组(P<0.05),试验Ⅰ组粗蛋白质表观消化率显著低于对照组(P<0.05);保育阶段,试验Ⅰ组的粗蛋白质表观消化率显著低于对照组(P<0.05),试验Ⅳ组显著高于对照组(P<0.05)。2)仔猪33日龄时,各试验组血清总蛋白、白蛋白、球蛋白、尿素氮、葡萄糖含量、白蛋白/球蛋白和谷丙转氨酶及谷草转氨酶活性与对照组相比差异均不显著(P>0.05)。试验Ⅱ组血清免疫球蛋白G含量显著低于对照组(P<0.05),但免疫球蛋白A和免疫球蛋白M含量显著高于对照组(P<0.05)。从结果中可以看出,3%小麦水解蛋白+2%进口酵母提取物、5%酪蛋白、3%大豆分离蛋白+2%进口酵母提取物、3%大豆分离蛋白+2%国产酵母提取物可以替代基础饲粮中的血浆蛋白粉,并且对断奶仔猪的生长性能无显著影响。     

饲粮蛋白质来源对仔猪生长性能、肠道形态、血清激素和免疫指标的影响

本试验旨在研究饲粮蛋白质来源对仔猪生长性能、肠道形态、血清激素和免疫指标的影响.选用(22±1)日龄、体重(7.00±0.19)kg断奶"杜×长×大"三元仔猪320头,随机分为4组,每组5个重复,每个重复16头猪.断奶仔猪分别饲喂不同蛋白质来源(血浆蛋白粉组、大豆浓缩蛋白组、乳清浓缩蛋白组和鸡蛋粉组)的饲粮,10 d后各组饲粮更换为同一保育料.试验期32 d.结果表明:断奶后10 d,血浆蛋白粉组仔猪日增重分别比大豆浓缩蛋白组、乳清浓缩蛋白组和鸡蛋粉组提高了6.44%(P<0.05)、5.47%(P>0.05)和5.71%(P>0.05),料重比分别比大豆浓缩蛋白组、鸡蛋粉组降低了16.67%(P<0.01)和14.11%(P<0.05).血浆蛋白粉组小肠绒毛高度显著高于大豆浓缩蛋白组(P<0.05),血清IgG、IgA、补体G浓度分别比大豆浓缩蛋白组提高了17.50%、9.31%和4.41%(P<0.05);血浆蛋白粉组第5天、第10天皮质醇浓度显著低于大豆浓缩蛋白组(P<0.05);鸡蛋粉组第5天、第10天IgA和第10天补体C3浓度显著高于大豆浓缩蛋白组(P<0.05);乳清浓缩蛋白组第5天和鸡蛋粉组第10天血清皮质醇浓度均显著低于大豆浓缩蛋白组(P<0.05);断奶后10 d各组间腹泻指数和腹泻率差异不显著(P>0.05).结果提示,血浆蛋白粉是仔猪断奶后10 d理想蛋白质来源,从本试验全期看,大豆浓缩蛋白是仔猪理想蛋白质来源.     

发酵构树饲料对断奶仔猪生长性能、养分表观消化率和血清生化指标的影响

本试验旨在研究饲粮中不同比例发酵构树饲料对断奶仔猪生长性能、养分表观消化率和血清生化指标的影响.试验选取35日龄、体重为(7.4±1.1)kg的健康断奶仔猪216头,随机分为Ⅰ(对照)、Ⅱ、Ⅲ、Ⅳ组,每组3个重复,每个重复18头仔猪.其中,Ⅰ组饲喂基础饲粮;Ⅱ组饲喂3％发酵构树饲料+97％基础饲粮;Ⅲ组饲喂6％发酵构树...     

日粮添加不同大豆源蛋白对仔猪生长性能和养分利用率的影响

试验旨在研究不同大豆源蛋白对断奶仔猪生长性能、腹泻率和养分消化率的影响。试验1选取(21±1)d杜×长×大断奶仔猪500头,采用完全随机设计分为5个组,每组5个重复,每个重复20头,各组分别饲喂两种大豆浓缩蛋白和三种豆粕源日粮;试验2选择(21±1)d杜×长×大断奶仔猪300头,采用完全随机设计分为3个组,每组5个重复,每个重复20头,各组分别饲喂三种豆粕源日粮,试验时间为21~57 d。结果显示:仔猪饲喂大豆浓缩蛋白日粮与豆粕型日粮对生长性能无显著影响(P0.05),但大豆浓缩蛋白日粮显著降低了仔猪的腹泻率(P0.05)。美国源豆粕较巴西和阿根廷源豆粕显著提高了平均日增重和饲料报酬(P0.05)。大豆浓缩蛋白日粮较豆粕型日粮显著提高了仔猪粗蛋白质的表观消化率(P0.05)。美国和巴西源豆粕较阿根廷源豆粕显著降低了仔猪腹泻率(P0.05)。结果表明:日粮中用等量的大豆浓缩蛋白替代豆粕对断奶仔猪的生长性能无显著影响,但可以提高粗蛋白质的表观消化率和降低仔猪腹泻率。在本试验条件下,美国豆粕较巴西和阿根廷豆粕提高了仔猪的生长性能,降低了仔猪腹泻率。     

大豆浓缩蛋白对超早期断奶仔猪生产性能、小肠粘膜结构和细胞免疫机能的影响

为探讨大豆浓缩蛋白在超早期断奶仔猪饲粮中的应用,试验选用72头14日龄杜×(大×长)三元杂交断奶仔猪随机分为4组:处理一,不添加血浆蛋白粉和大豆浓缩蛋白;处理二,添加5%血浆蛋白粉,不添加大豆浓缩蛋白;处理三,添加2.5%血浆蛋白粉和5%大豆浓缩蛋白;处理四,不添加血浆蛋白粉,添加10%大豆浓缩蛋白。每处理3个重复(栏),每重复6头猪,试验为期4周。试验结果表明:超早期断奶仔猪饲粮添加5%血浆蛋白粉提高了仔猪采食量(P<0.05)与日增重(P<0.01),降低仔猪料重比(P<0.01);大豆浓缩蛋白未能提高仔猪采食量(P>0.05),可在一定程度上提高仔猪日增重与饲料效率(P>0.05);大豆浓缩蛋白对仔猪小肠粘膜结构和细胞免疫机能没有影响(P>0.05),但有降低仔猪免疫激活状态的趋势(P>0.05)。     

评估L-蛋氨酸的有效性及标准回肠可消化蛋氨酸水平对断奶仔猪生长性能、营养物质表观消化率及血浆参数的影响

本试验以DL-蛋氨酸作为对照,评估L-蛋氨酸作为断奶仔猪饲粮蛋氨酸来源的有效性,并初步确定满足断奶仔猪营养需要的标准回肠可消化蛋氨酸(SID Met)水平对断奶仔猪生长性能、营养物质表观消化率及血浆参数的影响。试验采用完全随机区组设计,将180头28日龄断奶的"杜×长×大"三元杂交仔猪[初始体重为(7.83±1.37)kg]按体重、性别、遗传基础相似的原则,分为5个组,每组6个重复,每个重复6头猪,公母分开饲养。对照组以DL-蛋氨酸作为蛋氨酸来源,SID Met水平为0.34%;试验组以L-蛋氨酸作为蛋氨酸来源,SID Met水平分别为0.28%(试验Ⅰ组)、0.31%(试验Ⅱ组)、0.34%(试验Ⅲ组,与对照组SID Met水平相同)和0.37%(试验Ⅳ组)。试验期28 d。结果表明:饲粮中SID Met水平的升高可显著提高平均日增重并显著改善饲料转化率(P<0.05),同时干物质和粗蛋白质的表观消化率呈线性升高(P<0.05);随着饲粮SID Met水平的提高,血浆尿素氮含量显著降低(P<0.05),血浆游离蛋氨酸和半胱氨酸含量显著增高而丝氨酸含量显著降低(P<0.05);根据折线模型,以平均日增重为指标,得出本试验条件下断奶仔猪适宜SID Met水平为0.35%。对照组与试验Ⅲ组相比,断奶仔猪的生长性能、营养物质表观消化率及血浆参数差异均不显著(P>0.05);以平均日增重为指标的相对生物学效价结果表明,等摩尔量L-蛋氨酸相对于DL-蛋氨酸的生物学效价为97%。由此可见,本试验使用的L-蛋氨酸可作为断奶仔猪饲粮的有效蛋氨酸来源,适宜SID M et水平为0.35%;初步评估L-蛋氨酸与DL-蛋氨酸相对生物学效价相当,二者在断奶仔猪饲粮中饲用效果相近。     

饲粮添加酶解蛋白肽对断奶仔猪生长性能、血清免疫指标和肠道菌群的影响

本试验旨在探究饲粮添加酶解蛋白肽对断奶仔猪生长性能、血清免疫指标和肠道菌群的影响,以确定断奶仔猪饲粮中酶解蛋白肽的适宜添加水平。试验选取150头21日龄体重为(7.01±0.17) kg的健康“杜×长×大”三元杂交断奶仔猪,随机分为5个组,每组5个重复,每个重复6头(公母各占1/2)。各组断奶仔猪分别饲喂在基础饲粮中添加0(对照组)、2%、4%、6%和8%酶解蛋白肽的等氮等能饲粮。试验共35 d,其中预试期7 d、正试期28 d。结果表明：1)与对照组相比,饲粮添加6%和8%酶解蛋白肽极显著提高各阶段断奶仔猪平均日采食量和平均日增重(P<0.01),极显著降低第1～14天和第1～28天腹泻率(P<0.01),显著降低第15～28天料重比(P<0.05);饲粮添加6%酶解蛋白肽极显著降低断奶仔猪第15～28天腹泻率(P<0.01),显著降低第1～14天和第1～28天料重比(P<0.05)。2)试验第14天,与对照组相比,饲粮添加2%～6%酶解蛋白肽极显著提高断奶仔猪血清免疫球蛋白G(IgG)含量(P<0.01),饲粮添加2%、4%和8%酶解蛋白肽极显著...     

Concentrations of strontium,barium, cadmium,copper, zinc,manganese, chromium,antimony, selenium,and lead in the liver and kidneys of dogs according to age,gender, and the occurrence of chronic kidney disease

This study was conducted to measure the concentrations of strontium (Sr), barium (Ba), cadmium (Cd), copper (Cu), zinc (Zn), manganese (Mn), chromium (Cr), antimony (Sb), selenium (Se), and lead (Pb) in canine liver, renal cortex, and renal medulla, and the association of these concentrations with age, gender, and occurrence of chronic kidney disease (CKD). Tissues from 50 dogs were analyzed using inductively coupled plasma mass spectrometry. Cu, Zn, and Mn levels were highest in the liver followed by the renal cortex and renal medulla. The highest Sr, Cd, and Se concentrations were measured in the renal cortex while lower levels were found in the renal medulla and liver. Female dogs had higher tissue concentrations of Sr (liver and renal medulla), Cd (liver), Zn (liver and renal cortex), Cr (liver, renal cortex, and renal medulla), and Pb (liver) than male animals. Except for Mn and Sb, age-dependent variations were observed for all element concentrations in the canine tissues. Hepatic Cd and Cr concentrations were higher in dogs with CKD. In conclusion, the present results provide new knowledge about the storage of specific elements in canine liver and kidneys, and can be considered important reference data for diagnostic methods and further investigations.     

Antibacterial action of combinations of oxytetracycline, dimethyl sulfoxide, and EDTA-tromethamine on Proteus, Salmonella, and Aeromonas

Antibacterial effects against Proteus mirabilis, Salmonella typhimurium, and Aeromonas hydrophila were obtained with subminimal inhibitory concentrations of oxytetracycline and EDTA-tromethamine. Antibacterial effects were not observed with subminimal inhibitory concentrations of dimethyl sulfoxide plus oxytetracycline or with dimethyl sulfoxide plus EDTA-tromethamine. Using a 2-dimensional Microtiter checkerboard technique, inhibitory activities of the various combinations of solutions were studied, and isobolograms were plotted. A synergistic effect was seen with combinations of oxytetracycline and EDTA-tromethamine. The greatest synergistic effect was observed when the mixture was caused to react with P mirabilis. These findings were confirmed by kinetic studies of microbial death, using one-fourth minimal inhibitory concentrations of these preparations.     

Comparative cardiovascular, analgesic, and sedative effects of medetomidine, medetomidine-hydromorphone, and medetomidine-butorphanol in dogs

OBJECTIVE: To compare sedative, analgesic, and cardiopulmonary effects after IV administration of medetomidine (20 microg/kg), medetomidine-hydromorphone (20 microg of medetomidine/kg and 0.1 mg of hydromorphone/kg), and medetomidine-butorphanol (20 microg of medetomidine/kg and 0.2 mg of butorphanol tartrate/kg) in dogs. ANIMALS: 6 dogs healthy mixed-breed dogs. PROCEDURE: Instruments were surgically inserted, and heart rate (HR), respiratory rate (RR), systolic arterial pressure (SAP), mean arterial pressure (MAP), diastolic arterial pressure (DAP), mean pulmonary arterial pressure (MPAP), pulmonary capillary wedge pressure (PCWP), central venous pressure (CVP), core body temperature, and cardiac output (CO) were measured 0, 5, 10, 15, 30, 45, and 60 minutes after injection. Cardiac index (CI), stroke volume (SV), stroke index (SI), systemic vascular resistance (SVR), and pulmonary vascular resistance (PVR) were calculated. Arterial samples for blood gas analysis were collected 0, 15, and 45 minutes after injection. Intensity of analgesia, degree of sedation, and degree of muscle relaxation were evaluated at aforementioned time points and 75, 90, 120, 150, 180, and 210 minutes after injection. RESULTS: Administration of medetomidine, medetomidine-hydromorphone, and medetomidine-butorphanol was associated with increases in SAP, MAP, DAP, MPAP, PCWP, CVP, SVR, PVR, core body temperature, and PaCO2 and decreases in HR, CO, CI, SV, SI, RR, pH, and PaO2. Clinically important differences were not detected among treatments. Medetomidine-hydromorphone and medetomidine-butorphanol provided a longer duration of sedation and better quality of analgesia, compared with medetomidine alone. CONCLUSIONS AND CLINICAL RELEVANCE: Medetomidine-hydromorphone or medetomidine-butorphanol is associated with improved analgesia and sedation but has cardiopulmonary effects comparable to those for medetomidine alone.     

Toxicology of selected pesticides, drugs, and chemicals. Anticoagulant, cholecalciferol, and bromethalin-based rodenticides

The control of rodent pests is a continuing goal of mankind. To this end, a multitude of rodenticides have been produced, each designed to kill rodents by exerting their toxic effects on various body systems. As examples, veterinarians have had to manage companion animal poisonings due to anticoagulant, sodium fluoroacetate (compound 1080), thallium, barium carbonate, and zinc phosphide-based rodenticides. Many of these rodenticides were introduced because of their anticipated safety in relation to nontarget species; unfortunately, this has not been the case. Veterinarians must attempt to identify the specific rodenticide involved in poisoning cases. Therapeutic success in these poisonings is often more dependent upon symptomatic and supportive care rather than the use of antidotal therapy.     

Echocardiography, electrocardiography, and radiography of cats with dilatation cardiomyopathy, hypertrophic cardiomyopathy, and hyperthyroidism

The echocardiographic, ECG, and radiographic findings of sequentially examined cats with dilatation cardiomyopathy (DCM, n = 7), hypertrophic cardiomyopathy (HCM, n = 8), and hyperthyroidism (HT, n = 20) were compared with those of healthy control cats (n = 11). Cats with DCM were easily differentiated from healthy cats by echocardiography and from cats with HCM and HT by a dilated left ventricle at end-diastole with a mean +/- SD of 2.20 +/- 0.36 cm, reduced fractional shortening (2.9% +/- 3.7%), reduced aortic amplitude (0.07 +/- 0.05 cm), reduced left ventricular wall amplitude (0.09 +/- 0.09 cm), and increased E-point septal separation (0.83 +/- 0.29 cm). The cats with HCM were most consistently recognized echocardiographically by increased left ventricular wall thickness at end-diastole (0.75 +/- 0.12 cm). Some cats with HT had abnormal echocardiograms with left ventricular wall hypertrophy. These cats could usually be differentiated from the cats with HCM because of normal or increased ventricular wall amplitude, aortic amplitude, or percentage of thickening of the left ventricular wall and interventricular septum. Left atrial enlargement (left atrial diameter greater than 1.57 cm or left atrium/aorta greater than 1.75) was commonly detected by the echocardiogram in cats with DCM, HCM, or HT. The echocardiogram was helpful in differentiating the type of cardiomyopathy (DCM, HCM, or HT) when plain thoracic radiographs indicated that cardiomegaly existed. The ECG may have indicated incorrectly that there was left ventricular enlargement in some cats with HT, and it did not indicate consistently that left ventricular enlargement existed when present in cats with DCM or HCM. The ECG was a poor indicator of left atrial enlargement in all cats.     

Comparisons of Angus, Charolais, Galloway, Hereford, Longhorn, Nellore, Piedmontese, Salers, and Shorthorn breeds for weight, weight adjusted for condition score, height, and condition score of cows

Breed differences for weight (CW), height (CH), and condition score (CS) were estimated from records (n = 12,188) of 2- to 6-yr-old cows (n = 744) from Cycle IV of the U.S. Meat Animal Research Center's Germplasm Evaluation (GPE) Program. Cows were produced from mating Angus and Hereford dams to Angus, Hereford, Charolais, Shorthorn, Galloway, Longhorn, Nellore, Piedmontese, and Salers sires. Samples of Angus and Hereford sires were 1) reference sires born from 1962 through 1970 and 2) 1980s sires born in 1980 through 1987. The mixed model included cow age, season of measurement and their interactions, year of birth, pregnancy-lactation code (PL), and breedgroup as fixed effects for CW and CS. Analyses of weight adjusted for condition score included CS as a linear covariate. The model for CH excluded PL. Random effects were additive genetic and permanent environmental effects associated with the cow. Differences among breed groups were significant (P < 0.05) for all traits and were maintained through maturity with few interchanges in ranking. The order of F1 cows for weight was as follows: Charolais (506 to 635 kg for different ages), Shorthorn and Salers, reciprocal Hereford-Angus (HA) with 1980s sires, Nellore, HA with reference sires, Galloway, Piedmontese, and Longhorn (412 to 525 kg for different ages). Order for height was as follows: Nellore (136 to 140 cm), Charolais, Shorthorn, Salers, HA with 1980s sires, Piedmontese, Longhorn, Galloway and HA with reference sires (126 to 128 cm). Hereford and Angus cows with reference sires were generally lighter than those with 1980s sires. In general, breed differences for height followed those for weight except that F1 Nellore cows were tallest, which may in part be due to Bos taurus-Bos indicus heterosis for size.     

Genetic parameters among weight, prolificacy, and wool traits of Columbia, Polypay, Rambouillet, and Targhee sheep

Genetic parameters for Columbia, Polypay, Rambouillet, and Targhee sheep were estimated using REML with animal models for prolificacy, weight, and wool traits. All bivariate analyses included a covariance between additive genetic effects for the two traits plus appropriate additional covariances. Number of observations by breed ranged from 5,140 to 7,095 for prolificacy traits, from 7,750 to 9,530 for weight traits, and from 4,603 to 34,746 for wool traits. Heritability estimates ranged from .03 to .11 for prolificacy traits (litter size at birth and litter size at weaning), from .09 to .26 for weight traits (birth weight and average daily gain), and from .25 to .53 for wool traits (fleece weight, fleece grade and staple length). Estimates of direct genetic correlations among prolificacy and among weight traits were positive and ranged from .58 to 1.00 and .18 to 1.00, respectively. Estimates of direct genetic correlation between fleece weight and staple length were positive (.50 to .70) but were negative between fleece weight and fleece grade (-.60 to -.34) and between staple length and fleece grade (-.72 and -.40). Prolificacy and wool traits were essentially uncorrelated. Weight and prolificacy traits were slightly positively correlated. Weight traits had a moderate positive direct genetic correlation with fleece weight and staple length, but were uncorrelated with fleece grade. These estimates of genetic parameters between prolificacy, weight, and wool traits can be used to construct multiple-trait selection indexes for dual-purpose sheep.