Spatial and temporal spread of powdery mildew (Erysiphe pisi) in peas (Pisum sativum) varying in quantitative resistance     

S. L. H. Viljanen-Rollinson  C. M. A. Frampton  R. E. Gaunt  R. E. Falloon  & D. L. McNeil 《Plant pathology》1998,47(2):148-156

A field experiment was conducted to assess the progress in time and spread in space of powdery mildew (caused by Erysiphe pisi ) in pea ( Pisum sativum ) cultivars differing in resistance to the disease. Disease severity (proportion of leaf area infected) was measured in 19 × 23 m plots of cultivars Pania and Bolero (both susceptible) and Quantum (quantitatively resistant). Inoculum on infected plants was introduced into the centre of each plot. Leaves (nodes) were divided into three groups within the canopy (lower, middle, upper) at each assessment because of the large range in disease severity vertically within the plants. Disease severity on leaves at upper nodes was less than 4% until the final assessment 35 days after inoculation. Exponential disease progress curves were fitted to disease severity data from leaves at middle nodes. The mean disease relative growth rate was greater on Quantum than on Pania or Bolero, but it was delayed, resulting in an overall lower disease severity on Quantum. Gompertz growth curves were fitted to disease progress on leaves at lower nodes. Disease progress on Quantum was delayed compared with Pania and Bolero. The average daily rates of increase in disease severity from Gompertz curves did not differ between the cultivars on these leaves. Disease gradients in the plots from the inoculum focus to 12 m were detected at early stages of the epidemic, but the effects of background inoculum inputs and the rate of disease progress meant that these gradients decreased with time as the disease epidemic intensified. Spread was rapid, and there were no statistically significant differences between cultivar isopathic rates (Pania 2.2, Quantum 2.9 and Bolero 4.0 m d⁻¹).  相似文献   

An epidemiological analysis of a canine-biopsies database compiled by a diagnostic histopathology service     

Richards HG  McNeil PE  Thompson H  Reid SW 《Preventive veterinary medicine》2001,51(1-2):125-136

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Selection of variable-joining region combinations in the alpha chain of the T cell receptor   总被引：8，自引：0，他引：8  

M E Roth  M J Lacy  L K McNeil  D M Kranz 《Science (New York, N.Y.)》1988,241(4871):1354-1358

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Comparison of isothiocyanate yield from wasabi rhizome tissues grown in soil or water   总被引：1，自引：0，他引：1  

Sultana T  Porter NG  Savage GP  McNeil DL 《Journal of agricultural and food chemistry》2003,51(12):3586-3591

The isothiocyanate (ITC) yield of wasabi, the Japanese horseradish (Wasabi japonica), was measured on its release from glucosinolates in the rhizomes of plants grown in two traditional ways. Mature plants of 18 months old were harvested from two different commercial farms located in the South Island of New Zealand. At one farm, the plants were grown in raised soil beds, while the plants at the other farm were grown in gravel irrigated by river water. Following harvest, the rhizomes from each growth medium were divided into five size groups based on the weight and length of the rhizomes. The different sized rhizomes were also subdivided into proximal, medial, and distal portions of the rhizomes and each portion was further subdivided into epidermis plus cortex, and vascular plus pith. The individual and total ITC contents of each portion (proximal, medial, and distal) of the rhizomes were measured using dichloromethane extraction followed by the GC-FPD. The total ITC content of the rhizomes grown in soil increased (13 times) linearly from 6 to 114 g of rhizome weight, while the mean ITC content of the water-grown wasabi increased (10 times) nonlinearly for similar sized rhizomes. Water-grown rhizomes in the weight range from 18 to 45 g gave significantly (P = 0.030) higher total ITC (1-2 times) than similarly sized soil-grown rhizomes. Analysis of the tissues showed that the total and the individual ITCs were found in significantly higher levels (73 and 64%, respectively) in the skin and cortex tissue compared to the vascular and pith tissues. Analysis of the ITC content of the different locations of the wasabi rhizome showed that the distal portion of the rhizome contained significantly higher levels of both total and individual ITCs compared to the medial and proximal portions of the rhizome.  相似文献   

Locally invasive melanoma in the internal laminae of the hoof of a bay mule     

G. Kay  P. McNeil  D. Knottenbelt  N. Tligui 《Equine Veterinary Education》2020,32(2):66-70

An 8-year-old bay mule was presented with moderate right forelimb lameness and dark discolouration of the white line. Histopathology of the dark material indicated a melanoma. Extensive resection and debridement were not curative and the mule was subjected to euthanasia 70 days after presentation.  相似文献   

Metastatic aortic body tumour causing neck pain in a dog   总被引：1，自引：0，他引：1  

J. J. Callanan †  P. E. McNeil  T. J. Anderson  H. Laird 《The Journal of small animal practice》1991,32(10):525-528

An aortic body tumour in an 11-year-old male Jack Russell terrier with acute onset neck pain is described. Clinical signs were related to a metastatic lesion present in the spinal column and involving the vertebral body of the fifth cervical vertebra. Radiographic and post mortem findings are described including histopathologi-cal features of the tumour and ultrastructural observations.  相似文献   

Triplets in red deer (Cervus elaphus)   总被引：1，自引：0，他引：1  

JJ FYFF  MJ FYFFE 《Australian veterinary journal》1995,72(12):469-470

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Effects of xylazine on humans: a review   总被引：1，自引：0，他引：1  

JJ FYFFE 《Australian veterinary journal》1994,71(9):294-295

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Atlanto-occipital fusion and ataxia in the calf     

J S Boyd  P E McNeil 《The Veterinary record》1987,120(2):34-37

Atlanto-occipital fusion is a rare bony anomaly due to the failure of the developing arches of the first cervical vertebra to separate from the occiput. It may be associated with compressive myelopathy and must therefore be considered in the differential diagnosis of ataxia in the young animal. This report reviews the embryological development of the region and reports the findings in two cases of fusion in the calf.  相似文献   

Graduate students' views on unionization     

Castellanos M  Holland-Minkley AM  MacKenzie AB  McNeil AJ  Toomey D 《Science (New York, N.Y.)》2003,299(5605):345-346

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