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《畜牧与兽医》2017,(11):5-9
为研究精胺、亚精胺和腐胺对鹅等级前卵泡发育的作用,通过荧光定量PCR对其合成代谢关键酶亚精胺合成酶(spermidine synthase,SRM),精胺合成酶(spermine synthas,SMS)和精胺氧化酶(spermine oxidase,SMOX)基因mRNA在鹅等级前卵泡中的表达情况进行检测分析。结果发现:SMS,SRM和SMOX基因mRNA在鹅等级前卵泡中均有表达,通过差异分析发现SMS基因mRNA在PE等级卵泡中的表达量最高,且表达量显著高于其他4个等级卵泡(P0.05);而在SY,L,M和S这4个等级卵泡中表达量差异不显著(P0.05)。SRM基因mRNA在PE和L等级卵泡中的表达量较高,差异不显著(P0.05),但显著高于其他3个等级卵泡(P0.05);而在SY,M和S等级卵泡中SRM基因mRNA的表达量差异不显著(P0.05)。SMOX基因mRNA在5个等级卵泡中表达差异显著(P0.05)。 相似文献
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为研究促性腺激素抑制激素(Gonadotropin-inhibitory hormone,GnIH)基因表达与鹅卵泡发育间的关系,对鹅GnIH基因的CDS区序列进行了克隆与分析,并采用荧光定量PCR检测了该基因在产蛋高峰期鹅的不同大小卵泡中的表达量.序列分析结果表明,所获得的鹅GnIH基因CDS区长471 bp,编码157个氨基酸,与已知的其它鸟类GnIH相似性达87%.鹅GnIH前体包括3个“LPLRF”,具有典型的“LPXRF-酰胺”基序.荧光定量结果表明,鹅GnIH在所有不同大小的卵泡中均有表达,其表达量在卵泡发育过程中呈现规律性变化,总趋势是先增高后降低,且在直径4~5 mm的卵泡中表达量最高.研究结果显示,鹅卵泡GnIH基因的表达与卵泡选择性发育有关,且该选择过程可能发生在直径为4~5mm的卵泡.这一研究可为探讨季节性繁殖禽类卵泡发育的调控机理奠定基础. 相似文献
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《中国家禽》2021,(6)
为探明不同产蛋阶段鹅等级前卵泡中FOXO3基因与凋亡和自噬相关基因的mRNA表达情况,采用荧光定量PCR方法检测开产前、产蛋初期和产蛋高峰期鹅等级前卵泡中FOXO3基因及Bcl-2、Bax、Caspase3、Fas、Fasl、LC3、Beclin1等凋亡和自噬相关基因mRNA的表达情况。结果显示:凋亡和自噬相关基因在鹅产蛋周期不同阶段等级前卵泡中均有表达;产蛋高峰期FOXO3、Bcl2、Bax、Caspase3、Fas和Fasl的mRNA表达量随卵泡直径变大呈增加趋势,LC3和Beclin1的表达量随卵泡直径变大呈减少趋势;产蛋初期各基因的表达变化不一致。由此可见,鹅等级前卵泡中FOXO3基因的表达随着卵泡的发育而增加,且其表达变化趋势与凋亡相关基因基本一致,但与自噬相关基因的变化趋势相反,推测FOXO3基因可能与鹅卵泡颗粒细胞的凋亡和自噬有一定关联。 相似文献
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《中国畜牧杂志》2014,(21)
为研究载脂蛋白E受体2(ApoER2)在鹅卵泡发育过程中的表达模式,本研究克隆了鹅ApoER2基因cDNA部分序列,并用Real-time PCR方法检测其在鹅等级前和等级卵泡颗粒层和膜层中的mRNA表达水平。结果表明:克隆得到的鹅ApoER2 cDNA部分序列长848 bp,编码282个氨基酸,预测的鹅ApoER2部分氨基酸序列有4个低密度脂蛋白受体家族的保守结构域,包括低密度脂蛋白受体重复A类结构域、重复B类结构域、YWTD结构域和钙结合表皮生长因子样结构域;ApoER2在卵泡颗粒层和膜层的表达水平均在F1卵泡处显著性升至最高(P0.05),在其他等级和等级前卵泡颗粒层均趋于平稳(P0.05),且在等级卵泡中的表达均高于等级前卵泡,在卵泡膜层中的表达先降低后显著性升高(P0.05)。总体来看,ApoER2在鹅不同等级卵泡颗粒层的表达水平均远高于膜层。以上结果说明,鹅ApoER2蛋白应该具有转运脂质的功能。相比卵泡膜层,ApoER2主要在颗粒层实现其功能,重点表现在等级卵泡上,这可能与鹅卵黄脂质沉积特点有关。 相似文献
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《中国畜牧杂志》2020,(5)
为研究精胺对发育早期雌鹅卵巢生殖激素受体基因表达的影响,本实验分别用禽用生理盐水和5 mg/kg体重的精胺给28日龄雏鹅连续灌胃2周后称重,采集血液和卵巢组织,统计平均日增重、卵巢指数,并利用实时荧光定量PCR检测鹅下丘脑、垂体和卵巢组织中FSHR、LHR、ER1和ER2表达量。结果表明:5 mg/kg体重的精胺灌胃对鹅体重、卵巢重和卵巢/体重比均无显著影响;灌胃精胺组雏鹅卵巢组织LHR和ER2表达量分别是对照组的4.78倍和1.65倍(P0.05)。上述结果表明,外源性精胺可促进雏鹅卵巢组织ER2和LHR的表达,提示精胺能够通过介导生殖激素受体表达影响鹅的早期卵巢发育。 相似文献
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《中国畜牧杂志》2018,(12)
为探讨FAR1在不同等级卵泡和不同就巢时期卵泡中的表达规律,实验通过RT-PCR、RACE技术克隆FAR1基因mRNA序列,并用RT-qPCR检测浙东白鹅不同等级卵泡以及不同就巢时期卵泡的FAR1表达。结果表明:FAR1 mRNA包含83 bp的5'UTR,1 557 bp的开放阅读框(ORF)和229 bp的3'UTR,共编码518个氨基酸;系统进化树分析显示,浙东白鹅与鸭、鸡三者聚为一类;RT-qPCR检测显示,等级卵泡中FAR1表达量显著高于等级前卵泡(P0.05),但F4、F5等级卵泡低于卵巢组织表达量,产蛋期FAR1表达量显著高于就巢期(P0.05)。因此推测,FAR1基因与鹅生殖调控密切相关,不仅参与了鹅卵泡发育,且在产蛋期高表达。 相似文献
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《中国家禽》2019,(7)
为探讨TGFBRAP1在不同等级卵泡和不同就巢时期卵泡中的表达规律,通过RT-PCR、RACE技术克隆TGFBRAP1基因mRNA序列,并用RT-qPCR检测浙东白鹅不同等级卵泡以及不同就巢时期卵泡的TGFBRAP1表达。结果显示:TGFBRAP1 mRNA序列长为3 870 bp,其中包括45 bp的5′UTR和1 236 bp的3′UTR和2 589 bp的开放阅读框(Open reading frame,ORF),共编码862个氨基酸;RT-qPCR检测结果显示,等级卵泡中TGFBRAP1表达量均显著高于等级前卵泡(P0.05),但均低于卵巢组织表达量,同时还发现产蛋期TGFBRAP1表达量显著高于就巢期(P0.05)。研究表明,TGFBRAP1基因与鹅生殖调控密切相关,不仅参与了鹅卵泡发育,而且参与鹅产蛋/就巢发生。 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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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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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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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