Incidence of cereal and pasture viruses in New Zealand's native grasses

This study provides evidence for frequent and multiple invasions of New Zealand's native grasses by exotic cereal and pasture viruses. Fifteen native and three exotic grasses from 29 North Island and six South Island sites were surveyed for the presence of viruses using enzyme-linked immunosorb...

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Bibliographic Details
Published in:Annals of applied biology 2010-07, Vol.157 (1), p.25-36
Main Authors: Delmiglio, C, Pearson, M.N, Lister, R.A, Guy, P.L
Format: Article
Language:English
Subjects:
Agricultural and farming systems
Agronomy. Soil science and plant productions
Barley yellow dwarf virus
Biological and medical sciences
Biological invasions
BSMV
Chionochloa rubra
CnMoV
Cocksfoot mottle virus
Dichelachne
Festuca novae-zelandiae
Fundamental and applied biological sciences. Psychology
General agroecology. Agricultural and farming systems. Agricultural development. Rural area planning. Landscaping
General agronomy. Plant production
Generalities. Agricultural and farming systems. Agricultural development
Gramineae
Hierochloe
low-input pastoral systems
Microlaena stipoides
plant conservation
Poa
Poaceae
Sobemovirus
Triticum
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Summary:This study provides evidence for frequent and multiple invasions of New Zealand's native grasses by exotic cereal and pasture viruses. Fifteen native and three exotic grasses from 29 North Island and six South Island sites were surveyed for the presence of viruses using enzyme-linked immunosorbent assay (ELISA). Barley yellow dwarf virus and Cereal yellow dwarf virus (BYDV, CYDV: Luteoviridae) and Cocksfoot mottle virus (CoMV, Sobemovirus) are widespread throughout New Zealand. CoMV, previously considered to have a natural host range restricted to Dactylis and Triticum, was detected in Poa anceps, P. cita, Festuca novae-zelandiae, and Chionochloa rubra. New virus host reports include BYDV-PAV in Microlaena stipoides and Dichelachne crinita; BYDV-MAV in P. cita, F. novae-zelandiae and Hierochloe redolens; and CYDV-RPV in P. cita and M. stipoides. Nominal logistic regression analyses showed a correlation between the presence of exotic grass species and virus incidence. Host range experiments for BYDV-PAV and CoMV were performed with selected native and exotic grasses, and the results are discussed in context of the field-survey findings.
ISSN:0003-4746
1744-7348
DOI:10.1111/j.1744-7348.2010.00406.x