甘蓝型油菜硫代葡萄糖甙总量的若干遗传参数的研究

以华油16号、华油13号、71—39、Marnoo.Andor和Wesroona六个甘蓝型油菜品种及其F_Ⅰ为材料,用单因素设计分析法,NCⅡ设计法和不完全双列杂交法研究了种子中硫苷总量的几个遗传参数。结果表明,甘蓝型油菜种子硫苷总量的遗传为部分显性,显性度为0.22;广义遗传力是0.89—0.96;狭义遗传力是0.79—0.85;高硫苷品种间的一般配合力达极显著水准,而特殊配合力作用不大;正反交之间无显著差异。     

Resident forum abstractsEVALUATION OF THROMBOELASTOGRAPHY (TEG) IN NORMAL CATS

Objective: To establish normal parameters of thromboelastography (TEG) in healthy adult cats. Background: Thromboelastography (TEG) is an in vitro test of coagulation that has been shown to be useful in humans, dogs and select species to identify and quantify alterations of hemostasis (e.g., hypercoagulable and hypocoagulable states). It has also been demonstrated to be useful in monitoring effects of anticoagulant therapies. This test has not been evaluated in cats. Methods: Blood was collected from 25 clinically normal cats by venipuncture using a 21 gauge×3 1/2 inch butterfly catheter and syringe for medial saphenous or jugular venipuncture. A single 1.8 mL sample in 3.8% Sodium Citrate (9:1) was collected from each cat. Recalcified whole blood was analyzed 30 minutes following collection with the TEG® 5000 analyzer (Haemoscope, Niles, IL). Analysis temperature was 37.6°C. TEG parameters recorded included: R‐value (represents initial fibrin formation), K (time from R to standard fixed measure of clot firmness which represents contributions of platelets and fibrinogen), maximum amplitude (MA; represents absolute clot strength), and alpha angle (α; the slope of TEG tracing which represents rate of clot formation). The coagulation index (CI) was derived from the formula generated for humans to provide an overall assessment of whether the sample was hyper‐ or hypocoagulable. Results: Values for the 25 normal cat samples are reported as mean ±2 standard deviations. R=2.97; 1.23–4.72; K=1.54, 0.38–2.71; α=70.70, 57.76–83.65; MA=58.50, 45.26–71.74 and CI=2.27, 0.07–4.46. Compared to historical information obtained on normal dogs, cats have significantly shorter R and K and larger α, MA and CI. Conclusions: TEG does have reproducible performance when used to evaluate coagulation status in normal cats. Compared to dogs, normal cats favor a hypercoagulable state. Species‐specific normal values are necessary for interpretation of TEG results. This test bears potential value for use in future experimental and clinical work to investigate hemostasis in cats receiving anticoagulant therapies or in cats suffering from diseases such as cardiomyopathy which are thought to be associated with altered coagulation status.     

番茄新品种江蔬1号的选育

江蔬 1号番茄是以自交系 4170p和C94 32 2 4杂交选育而成的一代杂种。属中早熟 ,有限生长类型 ,抗ToMV、枯萎病、叶霉病。果实圆形、红色 ,果面光滑 ,果皮厚 ,耐贮运 ,商品率高。单果质量 2 10 g ,一般春季大棚每 6 6 7m2 产量 45 0 0kg左右 ,高产可达 5 5 0 0kg ,适于早春大棚栽培及露地地膜覆盖栽培。     

Pulmonary mycobacteriosis caused by Mycobacterium intracellulare in a Tasmanian devil (Sarcophilus harrisii)

The health of captive Tasmanian devils (Sarcophilus harrisii) is currently of increased interest because wild populations are being decimated by the spread of devil facial tumour disease. This report describes the pathology of an aged captive Tasmanian devil that had a pulmonary mycobacterial infection caused by Mycobacterium intracellulare in addition to multiple neoplastic processes.     

中国松树枯梢病菌遗传多态性的RAPD分析

运用随机增增多态ＤＮＡ（ＲＡＰＤ）技术对发生于我国１３省区１６种松树和其它２种针叶树上的松枯梢病菌（Ｓｐｈａｅｒｏｐｓｉｓ ｓａｐｉｎｅａ）的５５个菌株进行基因组ＤＮＡ多态性分析。用１７个随机引物经ＰＣＲ扩增共得到２００个ＲＡＰＤ标记,其中９８．５％具有多态性。ＵＰＧＭＡ聚类分析确定了供试菌株间的亲缘关系,将５５个菌株分为３个类群。各菌株间的差异与其寄主种类无明显关系,与其地理来源在某些类群间有一定联系,但在大多数菌株间相关趋势不明显。     

三尖杉的育苗技术

针对三尖杉种子休眠期长、发芽率极低(仅10%) 的问题,经近10年的试验研究,初步掌握了三尖杉种子的采收加工和播种育苗技术。以此 为基础,从采收及种子处理、种子层积催芽、播种育苗、育苗期的管护措施等方面,详细介 绍了三尖杉的育苗技术。     

木材缺陷图像的灰度形态滤波

介绍数学形态学中的灰度形态滤波方法,给出对木材缺陷图像进行闭、开运算处理后的仿真图像实例,利用木材缺陷图像截面灰度分布对处理效果进行分析.结果表明:采用灰度形态滤波方法对木材缺陷图像进行滤波处理,可有效去除木材缺陷图像中的噪声,改善图像的视觉效果,提高后期缺陷边缘检测的精确度,从而证明该方法对木材缺陷图像进行滤波处理是可行的.     

基于高温诱发树木多倍体的模糊PID温度控制器

针对树木枝芽的室外高温诱发多倍体处理,介绍了一种模糊PID温度控制器,该控制器具有显示温度、设定温度、自动控制温度等功能。控制器采用PID参数模糊自整定方法,充分发挥了其动态响应好、上升时间快、超调小的特点,具有较高的动态跟踪品质和稳态精度,并在实际应用中取得了较好的控制效果。