共查询到19条相似文献，搜索用时 93 毫秒
1.
2.
杜泊绵羊超数排卵与胚胎移植试验 总被引：1，自引：0，他引：1
选纯种杜泊绵羊经产母羊(22只)为供体,通过实施同期发情、超数排卵、重复配种处理,其中20只可利用供体,每只平均采得可用胚胎5.20枚.选小尾寒羊经产母羊(90只)为受体,经同期发情处理,对有黄体发育的母羊(72只)实施胚胎移植手术.结果表明,移植单胚(40只)受体的受胎率为47.50%,移植双胚(32只)受体的受胎率为62.50%;平均受胎率为54.17%,平均每产1只羔羊所需胚胎数为2.60枚,每只供体羊冲胚1次提供的羔羊数为2只. 相似文献
3.
2006年在青海省海西州德令哈市洋嘉生态农业开发有限公司进行了绵羊胚胎移植试验,试验中同期发情和超数排卵处理青海高原毛肉兼用半细毛羊共86只,同期发情率达88.37%,其中将超排效果好的11只羊做为胚胎移植受体羊,同时处理供体羊特克赛尔羊7只。试验结果:11只受体羊平均超数排卵点2.8个/只,7只供体羊平均超数排卵11.9枚,取卵9.7枚,卵子受精率17.65%,移植12枚胚胎,其中1只受体羊移植双胚,最后观察到移植的11只受体羊中妊娠5只,产羔5只(移双胚的羊产1只羊羔),移植受胎率达45.45%,羔羊成活率达100%。 相似文献
4.
5.
选取24只内蒙古细毛羊作为供体,300只小尾寒羊作为受体,用FSH CIDR法对供体进行超排,采用人工授精对供体进行配种;采用两次PGF2α注射法对受体进行同期发情;采用手术法子宫角回收供体的胚胎,经过鉴定后移植给受体。结果表明:24只供体获得胚胎共275枚,可用胚胎236枚,每只供体羊获得9.83枚可用胚胎,胚胎合格率为85.82%。287只受体表现发情,发情率为95.70%,其中同期发情的羊219只,同期发情率73.00%。236枚胚胎移入214只受体,其中22只移植双胚,143只受体被确认为妊娠,产下羔羊121只,产羔率为56.54%。 相似文献
6.
《畜牧与饲料科学》2017,(1)
为了解决细毛羊优质种源短缺的问题,选用鄂尔多斯细毛羊种羊作为供体羊,蒙古羊作为受体羊,进行胚胎移植试验,以期通过胚胎移植技术进行优质种源快速扩繁。试验选取55只(其中36只进行二次冲胚)鄂尔多斯细毛羊母羊作为供体,以蒙古羊作为受体,采用递减法注射FSH进行超排处理。经同期发情、超数排卵、人工授精等过程后,采用手术法子宫角回收供体的胚胎,经鉴定后移植。结果表明:91只供体共获得胚胎788枚,可利用胚胎479枚,供体平均冲胚8.66枚/只,供体平均可利用胚胎5.26枚/只,胚胎可利用率60.79%。将479枚胚胎移入469只受体,妊娠290只,受胎率为61.83%,产羔253只,繁殖率为53.94%。 相似文献
7.
澳洲美利奴超细毛羊超数排卵与胚胎移植试验 总被引：1，自引：1，他引：0
利用从澳大利亚进口的澳洲美利奴超细毛羊69只(其中经产母羊48只,初产母羊21只)做供体,小尾寒羊320只做受体,进行胚胎移植试验,结果表明:经产母羊的发情率、采胚数、有效胚胎数和可用率(有效胚胎数/采胚数)均高于初产羊.69只处理供体羊有66只发情,收集到441枚有效利用胚胎,320只处理受体羊,有265只可用做胚胎移植,178只小尾寒羊产羔,产羔265只,受胎率和有效胚胎利用率分别为67.2%和60.1%,平均每1.7枚胚胎产1只羔羊,平均每只供体羊可获羔羊4只. 相似文献
8.
9.
《中国草食动物科学》2016,(3)
选取37只优质阿尔巴斯型白绒山羊母羊作为供体,300只普通山羊为受体,采用递减法注射FSH进行超排。经同期发情、超数排卵、人工授精等过程后,采用手术法子宫角回收胚胎,经鉴定后移植。结果表明:37只供体共获得345枚胚胎,可用胚胎308枚,只均获得胚胎9.32枚、可用胚胎8.32枚,胚胎合格率高达89.28%。285只受体羊发情,发情率95%。将308枚胚胎移入273只受体,妊娠183只,受胎率67.03%,产羔197只,产羔率107.65%,繁殖率71.06%。 相似文献
10.
11.
旨在探讨以小尾寒羊和蒙古羊作为受体时,二者的胚胎移植效果及所产羔羊的早期生长性能之间的差异。选用南非肉用美利奴羊(n=11)和澳洲白绵羊(n=110)作为供体,以小尾寒羊(n=196)和蒙古羊(n=504)作为受体;对供体母羊进行超数排卵以及人工授精处理,记录供体母羊的收集胚胎总数和可用胚胎数,计算平均每只羊收集的可用胚胎数以及胚胎合格率;对小尾寒羊和蒙古羊进行同期发情及胚胎移植处理,记录受体母羊的产羔数,计算繁殖率;计算并比较不同受体母羊所产羔羊的平均初生重、成活率以及70日龄断奶羔羊数、70日龄断奶重、平均日增重、平均每只母羊提供的断奶羔羊数。结果表明,从供体母羊中共获得可用胚胎549枚,平均每只羊收集可用胚胎4.54枚,胚胎合格率为82.56%;利用胚胎移植技术,移植受体母羊529只,所产羔羊240只,平均繁殖率为45.37%;小尾寒羊的发情率和繁殖率明显高于蒙古羊;共获得70日龄断奶羔羊211只,羔羊成活率为87.92%,平均日增重为280.00g;小尾寒羊和蒙古羊所产的羔羊初生重没有显著差异(P>0.05),小尾寒羊所产羔羊的70日龄断奶重和平均日增重分别极显著(P<0.01)和显著(P<0.05)高于蒙古羊,而蒙古羊所产羔羊的成活率显著高于小尾寒羊(P<0.05);平均每只小尾寒羊母羊可提供的断奶羔羊数(0.42只)略高于蒙古羊(0.39只),小尾寒羊作为胚胎移植受体略具有优势。综合分析表明,在内蒙古兴安盟地区小尾寒羊和蒙古羊均可以作为胚胎移植的受体来使用。 相似文献
12.
Abolfazl Shirazi Ebrahim Ahmadi Majid Jadidi Naser Shams-Esfandabadi Banafsheh Heidari 《The Canadian veterinary journal. La revue veterinaire canadienne》2009,50(5):501-505
This is the first report of an acephalous lamb from the transfer of an in vitro-produced sheep embryo. Twelve in vitro-fertilized embryos were transferred to 4 recipient ewes (3 embryos/ewe). Two ewes remained pregnant: one delivered a normal female lamb, the other a male acephalous lamb. Possible contributing factors are discussed. 相似文献
13.
E Emsen CAG Diaz M Yaprak F Koycegiz M Kutluca H Emsen 《Reproduction in domestic animals》2012,47(1):8-11
The roles of recipient and embryo genotype in determining the growth performance and survivability of offspring based on specific behavioural differences were investigated using inter‐breed embryo transfer. This study was carried out using three recipient genotypes (Awassi, Redkaraman and Tuj) and two embryo genotypes (Charollais and Romanov) to obtain the six possible combinations of ewe and lamb genotypes. Data were collected from 71 recipient ewes (10 Redkaraman with Charollais and 15 Redkaraman with Romanov embryos; 10 Tuj with Charollais and 12 Tuj with Romanov embryos, and 12 Awassi with Charollais lambs and 12 Awassi with Romanov embryos); all ewes received two frozen‐thawed embryos. Awassi ewes had a significantly longer duration of the licking/grooming event (25.5 min, p < 0.05) than Tuj ewes. Charollais lambs were significantly (p < 0.05) more likely to require birth assistance compared to Romanov lambs. Romanov lambs were significantly more (p < 0.01) active than Charollais lambs in the first 2 h after birth; ewe breed had no effect on lamb behaviour. There was no recipient breed effect on either birth or weaning weights of lambs. Charollais lambs were recorded with higher birth (5.5 ± 0.3 kg vs 3.9 ± 0.2 kg; p < 0.001) and weaning (29.4 ± 1.2 kg vs 22.4 ± 1.9 kg; p < 0.001) weights compared to Romanov lambs. At weaning Romanov lambs had significantly higher (95% vs 75%; p < 0.05) survival rates, however, this was not significantly affected by recipient breed. It was concluded that recipient breed was not an important factor in survival and weaning performance of embryo transferred lambs from a prolific breed (Romanov) while these traits recorded for lambs from meat type (Charollais) embryos were influenced by dam breed. 相似文献
14.
Two experiments were conducted to examine the milk producing ability of Western White-Faced sheep and to identify traits that correlate well with milk production. In Exp. 1, 31 Targhee ewes were milked and five samples were taken during 107-d lactations in which the ewes nursed twin lambs. Milk yield and composition, lamb weights, ewe weights, wool growth, and udder size also were measured. In Exp. 2, 24 ewes (Rambouillet x Finn-Dorset) were separated from their lambs at 7 wk and milked twice per day for eight more weeks, during which milk yield and composition, feed consumption, udder width, and ewe weights were measured. Results from Exp. 1 showed that lamb 30-d weights, ewe weights at breeding time, and udder width at peak lactation were highly correlated with suckled milk yield (r = .81, .75 and .66, respectively). Results from Exp. 2 indicated that lamb weights and ewe weights were not useful for predicting milk yield in dairy ewes, but feed intake and udder width were (r = .74 and .86, respectively). Single-day milk yield measurements were excellent estimators of total lactation yield in both experiments. Milk yields averaged 1,714 g/d in the suckled ewes and 477 g/d in the dairy ewes. 相似文献
15.
应用TIT双羔素不同注射次数对青海半细毛羊进行了免疫试验,共免疫健康母羊939只,试验结果表明,注射了3次TIT双羔素,青海半细毛羊双羔率为10．90％,与注射2次1Tr双羔素(双羔率为7．Ol％)差异显著(P＜O．05)。 相似文献
16.
Prevalence and effect of subclinical ovine progressive pneumonia virus infection on ewe wool and lamb production 总被引：3，自引：0，他引：3
G D Snowder N L Gates H A Glimp J R Gorham 《Journal of the American Veterinary Medical Association》1990,197(4):475-479
The prevalence of infection with ovine progressive pneumonia (OPP) virus and its effects on ewe wool and lamb production were investigated in a flock of 2,976 ewes of 6 breed types (Rambouillet, Targhee, Columbia, Polypay, 1/4 cross Finnsheep, and 1/2 cross Finnsheep). Prevalence of seropositivity was significantly (P less than or equal to 0.01) lower among Rambouillet and Targhee breeds (44 and 42%, respectively), intermediate in Polypay, Columbia, and 1/4 cross Finnsheep (approximately 53%), and higher among 1/2 cross Finnsheep (62%). Seropositivity increased with age in all breed types from 11% at 1 year of age to 93% at greater than or equal to 7 years of age. Lateral disease transmission is indicated by linear increase of seropositivity prevalence with increasing age, including that in sheep greater than 6 years old. Subclinical infection with OPP virus had no apparent detrimental effect on number of lambs born, lamb viability, birth weight, number of lambs weaned, or growth rate of single and twin lambs, compared with findings for noninfected sheep in the same flock. Mature ewe body weight and grease fleece weight did not differ between subclinically infected seropositive and seronegative ewes. Subclinical infection with OPP virus does not appear to have an adverse economic effect on ewe wool and lamb production. Culling rate attributable to clinical manifestation of infection with OPP virus must be accurately determined before the true effects of virus infection on production can be determined and an eradication program can be recommended. 相似文献
17.
Six ewe genotypes, generated by mating Coopworth (C), Polypay (P), and Suffolk (S) rams to P and Coopworth-type (Ct) ewes, were exposed to Hampshire rams for spring lambing from 1987 through 1990. Data from 1,013 exposures and 973 resultant lambings were used to analyze reproductive traits and cumulative ewe productivity over 4 yr. Ewe body and fleece weights were also analyzed. Ewes from S sires weaned the heaviest lambs and ewes from P sires weaned the largest number of lambs, resulting in similar total weight of lamb weaned per ewe mated. Coopworth-sired ewes weaned the least total weight of lamb per ewe mated. Ewes weaning twins produced 54% more total litter weight per ewe than those weaning singles. Annual ewe survival averaged 95%, ranging from 93% for S x P and C x P ewes to 97% for P x Ct and C x Ct ewes. When cumulative number and weight of lamb produced was assessed on the basis of all ewes starting the trial, P-sired ewes were highest, followed in order by daughters of S and C sires. Suffolk-sired ewes (67 kg) were 13% heavier than daughters of P rams and 19% heavier than daughters of C rams. Adjustment of lamb production for ewe metabolic body size resulted in C-sired ewes being more efficient than the heavier S-sired ewes. Coopworth-sired ewes produced 32% more wool than ewes sired by the other two breeds. Differences in wool production between ewes weaning one or two lambs were small.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
18.
余忠祥 《青海畜牧兽医杂志》2003,33(2):8-9
试验在高寒牧区天然草地放牧条件下 ,测定陶×半细杂交一代羊出生到 4月龄和 6月龄的生长发育指标 ,结果表明 :在青海高原严酷的生态环境条件下 ,杂交一代羔羊生长发育快于青海半细毛羊 ,4月龄活重为 2 2 .73kg ,6月龄活重为 2 7.96kg ,分别比青海半细毛羔羊提高 3 .0 2kg、3 .64kg(P <0 .0 1)。体长、体高、胸围、胸宽、管围和尻宽显著高于青海半细毛羔羊 (P <0 .0 1) 相似文献
19.
试验通过使用人工授精后绵羊作为受体进行胚胎移植,以寻找一种更加有效的方法提高绵羊胚胎移植的经济效益。试验中使用FSH对10只无角道赛特绵羊进行超数排卵处理,同时对60只受体小尾寒羊进行同期发情。供体羊在发情配种后4.5～5.0d从子宫角收集胚胎。同时,将胚胎移植到同期发情并进行人工授精的受体羊子宫内。总共有57枚可用胚移植给44只受体小尾寒羊,32只怀孕到分娩,共产下羔羊51只(无角道赛特羔28只,道赛特与小尾寒羊杂种羔23只)。此外,经人工授精但未进行手术移植的7只小尾寒羊产下15只杂种羔羊。移胚植受体妊娠率72.7%(32/44),移胚受体繁殖率118%(51/44),受体利用率88.3%(53/60)。移胚受体总妊娠率和受体利用率均显著高于常规ET组(P<0.01)。与常规胚胎移植相比,受体羊人工授精后移植胚胎不仅提高了无角道赛特母羊的繁殖率,而且提高了受体羊的利用率。 相似文献