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1.
不同品种品系及品系组合猪间繁殖和生长性能测定报告 总被引：2，自引：0，他引：2
为了解大约克、长白和杜洛克3个品种不同品系的猪在繁殖性能和生长性能上的特点和差异,对大丰丰海种猪繁育有限公司所饲养的大约克(法系、美系、法×美、美×法)、长白(美系、挪系、美×挪、挪×美)和美系杜洛克的繁殖性状和生长性状进行测定和分析,结果表明:1)大约克猪的窝产仔数、窝产活仔数、初生窝重、21日龄断奶重、妊娠天数和断奶到再配种间隔在4个品系间差异不显著(P>0.05)。2)从长白猪所统计的6项繁殖指标而言,除初生窝重在4个品系间差异不显著外,其余5项指标(窝产仔数、窝产活仔数、21日龄断奶重、妊娠天数、断奶到再配种间隔)美系长白都相对较好。3)对于生长性状而言,大约克猪的4个品系达100 kg体重日龄间差异不显著(P>0.05),美系大约克的背膘最薄(13.1 mm),低于其它3个品系;在长白猪中,美系长白达30 kg体重日龄最低为76.83 d,极显著低于挪×美组合(P<0.01)。4)对于大约克、长白和杜洛克3个品种而言,达100 kg体重日龄分别为179.5 d、182.3 d和179.2 d,3者间差异不显著;杜洛克的活体背膘厚(10.5 mm)极显著低于大约克(13.9 mm,P<0.01),显著低于长白(13.6 mm,P<0.05)。 相似文献
2.
为更好地发挥滇陆猪的遗传潜力,笔者选择云南省生产实际中存在的3个父系品种一大约克、长白、杜洛克,分别与10头同期发情的滇陆母猪杂交,形成3个杂交组合一大约克X滇陆猪、长白×滇陆猪、杜洛克X滇陆猪,产仔后分别在每个组合中选择体重相近的8头断奶仔猪（公母各半）作为试验猪,各组合间体重配对,测定其生长性能及相关血清学指标。各组除猪种不同外饲养管理均相同。结果发现,大约克、长白、和杜洛克3个品种均可作为滇陆猪的配套父系,但从经济效益及增重等综合指标考虑,滇陆猪的配套父系优选次序为长白、大约克、杜洛克。 相似文献
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选择肉质优良地方品种金华猪、金华猪与引进瘦肉型猪杂交品种以及国外瘦肉型品种大约克等,屠宰测定其常规的肉质性状以及背最长肌中脂肪酸含量,探讨不同品种猪常规肉质性状以及背最长肌脂肪酸组成的差异。结果表明:在测定的6个品种中,金华猪的pH、肉色评分、大理石纹评分、系水力都是最高的,都显著高于国外瘦肉型品种大约克猪(P0.05);嫩度和失水率都是最低的,都显著低于大约克猪(P0.05)。在测定的6个品种猪背最长肌13种脂肪酸中除棕榈油酸外,品种间差异显著(P0.05)或极显著(P0.01)。金华猪背最长肌中饱和脂肪酸含量、饱和脂肪酸和单不饱和脂肪酸之和以及饱和脂肪酸和总不饱和脂肪酸的比值都是极显著高于外来品种大约克猪的(P0.01);单不饱和脂肪酸含量显著高于大约克(P0.05);多不饱和脂肪酸含量则极显著低于大约克猪(P0.01)。杜洛克×金华猪的饱和脂肪酸以及饱和脂肪酸和单不饱和脂肪酸之和均高于长白×金华猪、杜×长金猪和大约克猪,但品种之间差异不显著(P0.05)。而在金华猪杂交品种中,杜×长金猪的亚油酸含量是最高的,极显著高于杜洛克×金华猪和长白×金华猪(P0.01)。 相似文献
5.
1选好品种不同品种或品系间杂交所产生的第一代,比其双亲具有更高的生活力和生长强度,这就是杂交优势。可以选用瘦肉率高、生长速度快的长白公猪和大约克母猪杂交生产出"长×大"二元杂交母猪,其母性好,繁殖力强,窝产仔12头左右,泌乳性能好,瘦肉率达65%,是生产商品猪的优良母本。公猪可选择杜洛克来生产纯正的洋三元(杜×长×大),这样的三元猪增重快,同时也可以选用本地猪种作母本,与长白、大约克公猪杂交所得长×本二元母猪 相似文献
6.
对30日龄断奶太湖猪三元杂交仔猪、川猪(长白×荣昌)三元杂交仔猪和杜长大(杜洛克×长白猪×大约克)三元杂交仔猪进行育肥试验,结果表明,杜长大与川猪和太湖猪的增重差分别为3.6kg和4.9kg,差异显著(P0.05);饲料效率分别为3.17∶1、3.23∶1、3.17∶1。 相似文献
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本研究以南昌白猪为对象，滨湖黑猪、大约克、长白、杜洛克、长×南、杜×南等作对照，对７个品种或杂交组合的１１项常规肉质性状进行了研究，并对其杂种优势和遗传方式进行了初步分析。结果表明，南昌白猪肉质与大约克相近，优于长白、杜洛克、长×南和杜×南组。在三个外来纯种猪中，大约克肉质领先，长白最差，杜洛克介于两者之间。两个二元杂交组的肉质性状除个别指标以外，一般都低于南昌白猪，但优于对应的亲本外种猪。长×南和杜×南组在不同性状上各有高低。杂交亲本对杂种后裔的遗传影响强度，南昌白猪的大理石纹、９６小时贮藏损失、肌肉嫩度高于长白、杜洛克；长白猪的肉色、ＰＨ值高于南昌白猪；杜洛克的肉色、２４小时贮藏损失高于南昌白猪，其它各项肉质指标都呈亲本间均势状态。 相似文献
9.
<正> 用瘦肉型猪进行杂交是提高猪的瘦肉率的主要途径。我场饲养大约克、长白两个瘦肉型品种猪,为省内外提供杂交亲本。为了弄清我场饲养的大型约克和长白两个品种猪的肥育和屠宰性能我们于82年5月15日至8月20进行了试验测定、现将结果报告如下:一、试验结果第一阶段大约克(75～106日龄),平均日增重406±60克,其中两头母的日增重435.48±100克,公的日增重376.5±99.5克,母的比公的长得较快。长白(81～111日龄) 相似文献
10.
《养猪》2016,(5)
为研究不同品种和季节对公猪精液品质的影响,以28头长白公猪、87头大约克公猪、98头杜洛克公猪为研究对象,对其3年的精液品质进行了检测和分析。结果表明,杜洛克公猪的采精量显著或极显著小于长白、大约克,大约克公猪的精子活力显著优于长白公猪(P0.05),不同品种的精子密度差异不显著(P0.05);长白、大约克公猪的采精量以冬季最多,3个品种公猪的精子密度夏季显著或极显著小于冬季,精子活力四季差异不显著(P0.05);在同一季节,杜洛克公猪的采精量均小于长白、大约克,且冬季显著小于长白(P0.05),精子密度优于长白、大约克公猪(P0.05),大约克公猪的精子活力优于长白、杜洛克。结果显示,品种和季节对公猪精液品质有一定影响,炎热夏季做好猪舍的防暑降温工作,有利于改善精液品质。 相似文献
11.
试验选用96头平均体重14.82 kg左右的杜×长×大断奶仔猪,随机分成4组,每组3栏,每栏8头(公母各半)。对照组饲喂基础日粮,试验1、2、3组分别添加1%80目白术、0.2%白术多糖和1%微米白术。试验期30 d。结果表明:在生长性能方面,与对照组相比,1%微米白术添加组可显著提高日增重(P0.05)、降低饲料增重比和腹泻率,而且效果优于1%80目白术组和0.2%白术多糖组,在肠道形态和肠道微生态区系方面,与对照组相比,日粮添加1%80目白术、0.2%白术多糖、1%微米白术均可不同程度的提高十二指肠和空肠的绒毛高度,加深十二指肠和空肠的隐窝深度,并且增加肠道微生态区系的多样性,其中以1%微米白术添加组的效果最佳。 相似文献
12.
Sissay, M.M., Uggla, A. and Waller, P.J., XXXX. Prevalence and seasonal incidence of nematode parasites and fluke infections
of sheep and goats in eastern Ethiopia. Tropical Animal Health and Production, XXXX. A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal
(GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April
2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs
located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming
areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology
laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger, Oesophagostomum
columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying
degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal
abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy
season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different
nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those
observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes.
But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the
results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia. 相似文献
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Tropical Animal Health and Production - 相似文献
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Rassnick KM Gieger TL Williams LE Ruslander DM Northrup NC Kristal O Myers NC Moore AS 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2001,15(3):196-199
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks. 相似文献
15.
H Hayashi T Yoshimura J Y Chen 《Comparative immunology, microbiology and infectious diseases》1985,8(2):73-87
Our particular attention in this article was given to natural mediators for macrophages isolated from the sites of tissue injury. A number of chemotactic factors, which may satisfy many criteria making them acceptable as inflammatory leucocyte chemotactic factors, has been separated. Among them, our laboratory has isolated three macrophage (monocyte) chemotactic factors (MCF-a, -b and -c). Their purification, characterization and functional specificity are discussed. 相似文献
16.
Davis MS Willard MD Nelson SL Mandsager RE McKiernan BS Mansell JK Lehenbauer TW 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(3):311-314
Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large. 相似文献
17.
B. Cinar Kul N. Bilgen J.A. Lenstra O. Korkmaz Agaoglu B. Akyuz O. Ertugrul 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2015,132(6):449-453
Genetic variations in chromosome Y are enabling researchers to identify paternal lineages, which are informative for introgressions and migrations. In this study, the male‐specific region markers, sex‐determining region‐Y (SRY), amelogenin (AMELY) and zinc finger (ZFY) were analysed in seven Turkish native goat breeds, Angora, Kilis, Hair, Honaml?, Norduz, Gürcü and Abaza. A SNP in the ZFY gene defined a new haplotype Y2C. All domestic haplogroups originate from Capra aegagrus, while the finding of Y1A, Y1B, Y2A and Y2C in 32, 4, 126 and 2 Turkish domestic goats, respectively, appears to indicate a predomestic origin of the major haplotypes. The occurrence of four haplotypes in the Hair goat and, in contrast, a frequency of 96% of Y1A in the Kilis breed illustrate that Y‐chromosomal variants have a more breed‐dependent distribution than mitochondrial or autosomal DNA. This probably reflects male founder effects, but a role in adaptation cannot be excluded. 相似文献
18.
Furosemide continuous rate infusion in the horse: evaluation of enhanced efficacy and reduced side effects 总被引：1，自引：0，他引：1
Johansson AM Gardner SY Levine JF Papich MG LaFevers DH Fuquay LR Reagan VH Atkins CE 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):887-895
Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses. 相似文献
19.
Ling GV Thurmond MC Choi YK Franti CE Ruby AL Johnson DL 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):817-823
The objective of this report was to characterize 20-year changes in proportion of calcium oxalate (CaOx) calculi and struvite calculi in dogs, and associations with breed, age, and sex. In this retrospective study, results of analysis of urinary calculi from dogs were reviewed for specimens received between July 1, 1981, and December 31, 2001. Breed, sex, age, year of submission of the specimen, and mineral type(s) were analyzed statistically. CaOx or Struvite or both were contained in 18,966 of 20,884 (91%) specimens. For both sexes, a 20-year statistically significant increase was observed in the proportion of calculus specimens that contained CaOx. The increase in this proportion was greater in females (1% to 31%) than in males (18% to 82%). From 1998 to 2001, when proportions may have plateaued, the odds of specimens containing CaOx were markedly higher in 18 breeds, markedly lower in 5 breeds, and not significantly different in 13 breeds compared with crossbreds. For both sexes, a 20-year statistically significant decrease was observed in the proportion of calculus specimens that contained struvite. This decrease in proportion was greater for males (79-16%) than for females (97-68%). From 1998 to 2001, when proportions plateaued, the odds of calculi containing struvite were markedly lower in 20 breeds, markedly higher in 1 breed, and not significantly different in 15 breeds when compared with crossbreds. Breed, age, and sex were associated statistically with CaOx or struvite urolithiasis. In conclusion, there appears to have been a long-term increase in the proportion of specimens of canine urinary calculi that contain CaOx as well as a long-term decrease in the proportion of specimens of calculi that contain struvite for both male and female dogs. The rate of change appeared to begin leveling off in the period 1998 to 2001. The recent proportion of dogs with either CaOx- or struvite-associated urolithiasis may depend on breed, age, and sex, and on interactions among these 3 factors. 相似文献
20.
<正>1.INTRODUCTION Ensuring transportation network security is one Of the most daunting challenges confronting homeland security agencies today.Significant research has been dedicated.To model and analyze the vulnerability of transportation systems,while notably fewer studies propose specific strategies for deploying defensive technologies to safeguard these systems. 相似文献