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WANG Meng-zhi WANG Hong-rong College of Animal Science Technology Yangzhou University Yangzhou FU Zhu-yin CHEN Bin SONG Li College of Animal Science Guizhou University Guiyang 《家畜生态》2007,(5)
利用聚丙烯酰胺凝胶梯度电泳对贵州矮脚黄鸡、兴义矮脚鸡的血清前白蛋白(Pa)、白蛋白(Alb)、后白蛋白(Po)、运铁蛋白(Tf—1,Tf—2)5个位点多态性进行检测。结果表明:除Pa位点在矮脚黄鸡表现为单态,在兴义矮脚鸡表现为多态外,其它4个血清蛋白位点在两鸡种均具多态性,诸位点分别受2～3个(复)等位基因控制。Hardy-Weinberg平衡状态检测结果表明,两群体的Tf—1、Tf—2位点基因型频率都偏离了Hardy-Weinberg平衡状态。兴义矮脚鸡的有效等位基因数和期望杂合度(1.8792,0.4539)较大,矮脚黄鸡(1.7538,0.3772)较小,表明兴义矮脚鸡较矮脚黄鸡的遗传变异度大。 相似文献
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新培育的柴达木绒山羊的群体遗传检测研究 总被引：3，自引：3，他引：0
应用简单随机抽样法,在青海省德令哈抽取柴达木绒山羊57只,利用聚丙烯酰胺凝胶电泳技术测定9个血液蛋白质（酶）位点（α2,Alb,Hb,Alp,PA-3,EsD,Amy,Tf,LAP）,并对毛色及形态特征进行了遗传检测,结果表明,9个血液蛋白质（酶）位点中有6个位点表现出多型性,均由2个等位基因控制,位点平均杂合度为0.2773,9个外形特征中5个有多型性,其平均异质度为0.4610,毛色趋于纯白。利用群体遗传贴近度分析方法,剖析了柴达木绒山羊与其亲本群的相似程度,即外形特征上,柴达木绒山羊与辽宁绒山羊相似,而在血液蛋白质（酶）位点上柴达木绒山羊与柴达木山羊相似;在总体特征上,柴达木绒山羊与柴达木山羊、辽宁绒山羊的遗传贴近度分别为0.8257、0.8662。 相似文献
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以长沙卷烟厂天华养殖场6个杂交组台为研究对象，对血浆蛋白（酶）多态性与产肉性能的关系进行通用线性模型分析，结果表明，前白蛋白（Pa）传点、后运铁蛋白（Ptf）位点、淀粉酶1（Amy1）位点对皮厚的效应显著或极显著（P〈0．05或P〈0.01），淀粉酶1（Amy1）位点对屠宰率效应屐著（P〈0．05）.淀粉酶2（Amy2）位点对背膘厚效应显著（P〈0．05），运铁蛋白（Tf）位点、淀粉酶1（Amy1）位点对眼肌面积效应显著或极显著（P〈0．05或P〈0．01），后运铁蛋白（Ptf）位点对失水率效应显著（P〈0．05）．这5个位点有可能用于上述相应性状的标记辅助选择。 相似文献
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采用垂直板聚丙烯酰胺凝胶电泳法对塞北兔血液中的红细胞酯酶（Es-1,ES-3)、血红蛋白（Hb）、红细胞碳酸酐酶（CA）、血清转铁蛋白（Tf）、前转铁蛋白（Prt）、后白蛋白（Po）、白蛋白（Alb）和血清碱性磷酸酶（AKP）共9个蛋白位点的遗传多态性进行了检测。结果表明，在塞北兔群体中，Hb、Alb和Tf呈单态，Es-1、Es-3、Prt、Po、AKP和CA呈多态。根据多态蛋白位点的基因频率计算遗传距离，并用类平均聚类法进行聚类分析。结果表明，塞北兔与比利时兔遗传相似系数最大，遗传距离最近，与加利福尼亚兔遗传相似系数最小，遗传距离最远。 相似文献
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利用聚丙烯酰胺凝胶梯度电泳对贵州矮脚黄鸡、兴义矮脚鸡的血清前白蛋白(Pa)、白蛋白(Alb)、后白蛋白(Po)、运铁蛋白(Tf-1,Tf-2)5个位点多态性进行检测.结果表明:除Pa位点在矮脚黄鸡表现为单态,在兴义矮脚鸡表现为多态外,其它4个血清蛋白位点在两鸡种均具多态性,诸位点分别受2～3个(复)等位基因控制.Hardy-Weinberg平衡状态检测结果表明,两群体的Tf-1、Tf-2位点基因型频率都偏离了Hardy-Weinberg平衡状态.兴义矮脚鸡的有效等位基因数和期望杂合度(1.8792,0.4539)较大,矮脚黄鸡(1.7538,0.3772)较小,表明兴义矮脚鸡较矮脚黄鸡的遗传变异度大. 相似文献
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采用聚丙烯酰胺凝胶电泳技术测定了秦川牛（148头）血红蛋白（Hb）、运铁蛋白（Tf）、后运铁蛋白（PTf）、血清白蛋白（Alb）和后白蛋白（Pa）的遗传多样性。分析了各多态座位不同基因型与秦川牛若干繁殖性状的关系。结果表明：HbAA型母牛的初情期年龄（AFS），初产年龄（AFC）极显著早于HbAB型母牛（P〈0．01）。TfAA型母牛的初情期和初产年龄显著早于TfDD型母牛（P〈0．05）。PTf SS型母牛的初情期显著早于PTf FS型母牛和PTf FF型母牛（P〈0．05）。Alb AA型母牛的初情期显著早于Alb AC型母牛（P〈0．05）。Tf A基因对D基因的替代平均效应值初情期提前1．68d，初产年龄提前19．89d。AlbA基因对B基因的替代平均效应值初情期提前8．06d。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献