Field evaluation of tolerance to Tobacco streak virus in sunflower germplasm, and observations of seasonal disease spread

Sharman, M., Pagendam, D.E., Persley, D.M., Drenth, A. and Thomas, J.E. (2016) Field evaluation of tolerance to Tobacco streak virus in sunflower germplasm, and observations of seasonal disease spread. Annals of Applied Biology, 168 3: 390-399. doi:10.1111/aab.12270


Author Sharman, M.
Pagendam, D.E.
Persley, D.M.
Drenth, A.
Thomas, J.E.
Title Field evaluation of tolerance to Tobacco streak virus in sunflower germplasm, and observations of seasonal disease spread
Formatted title
Field evaluation of tolerance to Tobacco streak virus in sunflower germplasm, and observations of seasonal disease spread
Journal name Annals of Applied Biology   Check publisher's open access policy
ISSN 1744-7348
0003-4746
Publication date 2016-05
Sub-type Article (original research)
DOI 10.1111/aab.12270
Volume 168
Issue 3
Start page 390
End page 399
Total pages 10
Place of publication Chichester, West Sussex, United Kingdom
Publisher Blackwell Publishing
Collection year 2017
Language eng
Formatted abstract
Strong statistical evidence was found for differences in tolerance to natural infections of Tobacco streak virus (TSV) in sunflower hybrids. Data from 470 plots involving 23 different sunflower hybrids tested in multiple trials over 5 years in Australia were analysed. Using a Bayesian Hierarchical Logistic Regression (BHLR) model for analysis provided: (a) a rigorous method for investigating the relative effects of hybrid, seasonal rainfall and proximity to inoculum source on the incidence of severe TSV disease; (b) a natural method for estimating the probability distributions of disease incidence in different hybrids under historical rainfall conditions; and (c) a method for undertaking all pairwise comparisons of disease incidence between hybrids while controlling the familywise error rate without any drastic reduction in statistical power. The tolerance identified in field trials was effective against the main TSV strain associated with disease outbreaks, TSV-parthenium. Glasshouse tests indicate this tolerance to also be effective against the other TSV strain found in central Queensland, TSV-crownbeard. The use of tolerant germplasm is critical to minimise the risk of TSV epidemics in sunflower in this region. We found strong statistical evidence that rainfall during the early growing months of March and April had a negative effect on the incidence of severe infection with greatly reduced disease incidence in years that had high rainfall during this period.
Keyword Epidemiology
Hamiltonian Monte Carlo
Helianthus annuus
Stan
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Queensland Alliance for Agriculture and Food Innovation
 
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