大豆抗源抗SCN过程中POD酶动态分析

能动地大豆抗源抗孢囊线虫（ＳＣＮ）过程中过的氧化物酶（ＰＯＤ）活性和酶谱的变化研究,探讨了大豆抗源在抗病过程中是通过提高体内ＰＯＤ酶活性来抵御ＳＣＮ的侵染,抗源品种ＰＯＤ活性和酶谱呈动态变化。在侵染高峰期（３０￣３５ｄ）,高抗抗原体内ＰＯＤ酶活性最强,酶谱着色较深;而感病品种在侵染高峰期ＰＯＤ酶活性降至最低值,且一些酶带受损以至消失。另外,证实了ＰＯＤ酶在抗病过程中参与木质素的合成。抗病过程中酶活     

RFLP mapping of a new cereal cyst nematode resistance locus in barley

Cereal cyst nematode (CCN) ( Heterodera avenae Woll.) is an economically damaging pest of barley in many of the worlds cereal growing areas. The development of CCN-resistant cultivars may be accelerated with the application of molecular markers. Three resistance genes against the pest have been mapped previously to chromosome 2 ( Ha 1, Ha 2 and Ha 3). In this study, a third gene present in the Australian barley variety 'Galleon' derived from the landrace 'CI3576' was located. Segregation analysis of CCN resistance data derived from doubled haploid populations of the cross 'Haruna Nijo'×'Galleon' identified a single major locus controlling CCN resistance in the variety 'Galleon'. This locus mapped to the long arm of chromosome 5H estimated to be 6.2 cM from the known function restriction fragment length polymorphism marker XYL (xylanase). While five genes for CCN resistance, including Ha2, have been mapped to group 2 chromosomes in the Triticeae, no gene other than Ha4 has been identified on group 5 chromosomes.     

连续种植大豆抗孢囊线虫品种胁迫线虫生理小种变异研究

在生产条件下,高抗大豆抗孢囊线虫３号生理小种的抗线１号、抗线２号,在同一块地连续种植４－５年,明显发病。病土采用盆栽法,应用五个标准鉴定品种：Ｐｉｃｋｅｔ、Ｐｅｋｉｎｇ、ＰＩ８８７８８、ＰＩ９０７６３、Ｌｅｅ（Ｇｏｌｄｅｎ１９７０）及抗线２号,重新进行生理小种鉴定。按Ｒｉｇｇｓ（１９８８）标准,原来的３号生理小种线虫群体致病性发生变异,出现１４号生理小种。     

防腐浸渍处理后马铃薯癌肿病休眠孢子囊的大小变化

从采集的样本中发现马铃薯癌肿病的休眠孢子囊超过了已报道的形态大小,防腐浸渍液处理后休眠孢子囊平均大小缩小５０％以上。     

MAGNETIC RESONANCE IMAGING OF A MEDULLARY DERMOID CYST WITH SECONDARY HYDROCEPHALUS IN A DOG

Magnetic resonance images were acquired of the brain of a 7-year-old male Golden Retriever with hydrocephalus secondary to a medullary lesion. Images were acquired prior to and 4 weeks following surgical treatment for the hydrocephalus, and the dog was euthanased following the second imaging session. The MR images demonstrated a medullary lesion with patchy but predominantly hyperintense signal with both T1- and T2-weighting, within which small areas of low signal were scattered. There was little edema associated with this lesion and no enhancement with gadolinium. Postmortem examination revealed the medullary mass to be a dermoid cyst. Several small nodular lesions were identified within the central nervous system on the magnetic resonance images whose origin was uncertain on postmortem examination.     

ULTRASONIC DIAGNOSIS OF OVARIAN CYSTS IN TEN GUINEA PIGS

Ten guinea pigs with an ovarian cyst had clinical signs of anorexia, alopecia, or depression. Ultrasonographic features of the 2- to 3-cm diameter fluid-filled cysts included compartmentalization and connection to the ovary. In two animals, a unilateral cyst was present, and in two others, the cysts were bilateral. Diagnosis of the disease by plain radiography is difficult because of the similar opacity of ovarian cysts, abdominal neoplasms, and trichobezoars.     

保幼激素和蜕皮激素对天蚕卵巢发育的影响

天蚕５龄中期幼虫经保幼激素类似物ｍｅｔｈｏｐｒｅｎｅ,蜕皮激素类似物－ｅｃｄｙｓｏｎｅ处理后,幼虫期 卵巢发育与对照相比无明显差异。化蛹第１日的雌蛹用ｍｅｔｈｏｐｒｅｎｅ和蜕皮激素２０－ｈｙｄｒｏｅｃｄｙｓｏｎｅ处理 的结果表明,蜕皮激素促进蛹期卵巢发育,而保幼激素则反之,５龄中期幼虫经ｍｅｔｈｏｐｒｅｎｅ处理似能提 高成虫怀卵量,而蜕皮激素则反之。还讨论了这两种激素在天蚕制种中应用的可能性。     

稻水象甲卵巢发育程度的分级及其应用

 根据我国病虫测报工作中害虫卵巢分级的实践及基层站点的可操作性,提出一套稻水象甲的卵巢发育程度的分级标准,即分为发育前期(0级)、卵黄沉积前期(Ⅰ级)、卵黄沉积期(Ⅱ级)、产卵盛期(Ⅲ级)、产卵末期(Ⅳ级)和产后衰老期(Ⅴ级)六个级别。据此结合飞行肌和脂肪体的发育程度,可作为常规监测中确定稻水象甲种群性质的指标。     

大剂量HCG静注法治疗奶牛卵泡囊肿的试验

我们自１９９６年１月至１９９８年１０月对黑龙江省八五一一农场和八五六农场４６头患有卵泡囊肿的奶牛进行了４种治疗方法的对比试验,试验结果表明：大剂量ＨＣＧ静脉注射组（１２／１５）效果优于ＨＣＧ肌肉注射２０００单位组（４／９）、肌注ＬＨＲ２０００微克组（８／１２）和ＬＨ肌注２００单位组（６／１０）。