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Modelling effects of barley yellow dwarf virus on growth and yield of oats

Persson, Tomas (2006). Modelling effects of barley yellow dwarf virus on growth and yield of oats. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2006:16
ISBN 91-576-7065-X
[Doctoral thesis]

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Barley yellow dwarf (BYD) is a viral disease caused by a group of viruses that infect plant species within the family Poaceae and cause grain yield losses in cereal crops worldwide. The viruses causing the disease are divided into two groups, Barley yellow dwarf virus (BYDV) and Cereal yellow dwarf virus (CYDV), which are further divided into species and isolates. The viruses are spread from plant to plant only by grass feeding aphids. A growth model describing oats (Avena sativa) infected with BYDV was formulated. Driving variables for the model are air temperature and solar radiation. The model consists of three sub-models, one describing plant phenology, the second development of green plant area and the third plant growth and biomass allocation between vegetative tissues and grains. Green plant area determining parameters, radiation use efficiency (RUE) and allocation parameters were calibrated against data from a greenhouse experiment. The model was modified, and RUE recalibrated to fit field data from an experiment with artificial BYDV infections in oats carried out at the Swedish University of Agricultural Sciences south of Uppsala (59o49'N/17o39'E), in 2002. The reductions in RUE calibrated against BYDV-infected plants were tested against grain yield data from another experiment carried out in 2003 at the same geographical site with the same oat cultivar and same virus isolate as in the experiment from 2002. To investigate the relative importance of air temperature and solar radiation in relation to other factors previously shown to influence the degree of grain yield reductions in B/CYDV-infected oats, grain yields from experiments in which cultivar, virus isolate and type of infection procedure differed from the Ultuna experiment 2002 were simulated. The results of the model calibration show that green plant area determining parameters, RUE and allocation parameters are affected by a BYDV infection. In general, the test simulations of grain yield reductions differed considerably from those observed. Reasons for these differences and suggestions for model improvements are discussed in with help of experimental results on plant nitrogen changes in BYDV-infected plants. Author’s address: Tomas Persson, Department of Crop Production Ecology, SLU, 750 07 UPPSALA, Sweden

Authors/Creators:Persson, Tomas
Title:Modelling effects of barley yellow dwarf virus on growth and yield of oats
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :February 2006
Number of Pages:35
ALLI. Bisnieks, M., Persson, T., Eckersten, H. & Sigvald, R. 2005. The effects on yield and components of yield in oats infected with BYDV-PAV at different growth stages. Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz 112, 521-528. II. Persson, T. & Eckersten, H. 2003. Crude protein and lipid concentration in grains from oats infected with barley yellow dwarf virus. The BCPC International Congress Crop Science and technology 2003 The British Crop Protection Council. Glasgow. UK. III. Persson, T., Eckersten, H., Kvarnheden, A. & Yuen, J. Modelling influence of virus infection on leaf area and radiation use in oats under controlled climatic conditions. Acta Agriculturae Scandinavica Section B-Soil and Plant Science. In press IV. Persson, T., Eckersten, H., Kvarnheden, A. & Yuen, J. Modelling virus effects on oat grain yield under field conditions. (Submitted)
Place of Publication:Uppsala
ISBN for printed version:91-576-7065-X
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H20 Plant diseases
Subjects:Not in use, please see Agris categories
Agrovoc terms:avena sativa, oats, growth, developmental stages, barley yellow dwarf luteovirus, plant viruses, simulation models, analytical methods
Keywords:Avena sativa, BYDV, Barley yellow dwarf, plant growth, plant virus diseases, radiation use efficiency, RUE, simulation models
Permanent URL:
ID Code:1042
Department:(NL, NJ) > Dept. of Crop Production Ecology
Deposited By: Tomas Persson
Deposited On:28 Feb 2006 00:00
Metadata Last Modified:02 Dec 2014 10:09

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