T
Thomas J. Gulya
Researcher at Agricultural Research Service
Publications - 82
Citations - 1188
Thomas J. Gulya is an academic researcher from Agricultural Research Service. The author has contributed to research in topics: Helianthus annuus & Sunflower. The author has an hindex of 19, co-authored 77 publications receiving 976 citations. Previous affiliations of Thomas J. Gulya include United States Department of Agriculture.
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New Races of the Sunflower Downy Mildew Pathogen (Plasmopara halstedii) in Europe and North and South America
TL;DR: For the short term, it appears that seed treatment with metalaxyl may be the most effective control of sunflower downy mildew, and could be utilized for the production of PH resistant hybrids.
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Inheritance and molecular mapping of a downy mildew resistance gene, Pl 13 in cultivated sunflower ( Helianthus annuus L.)
TL;DR: The inheritance of resistance to sunflower downy mildew (SDM) derived from HA-R5 conferring resistance to nine races of the pathogen has been determined and the new source has been designated as Pl13 and closely linked markers to the Pl13 gene provide a valuable basis for marker-assisted selection in sunflower breeding programs.
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Genetics and mapping of the R 11 gene conferring resistance to recently emerged rust races, tightly linked to male fertility restoration, in sunflower ( Helianthus annuus L.)
TL;DR: The aim of this study was to elucidate the inheritance of rust resistance and male fertility restoration and identify the chromosome location of the underlying genes in Rf ANN-1742, an ‘HA 89’ backcross restorer line derived from wild annual sunflower, which was identified as resistant to the newly emerged rust races.
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Recent Changes in the Pathogenic Variability of Plasmopara Halstedii (Sunflower Downy Mildew) Populations from Different Continents
TL;DR: This paper attempts to present an accurate overview of races in Europe and Americas for the last 7 years by making accounts of the temporal and spacial changes in the pathogen populations in North and South America and Europe.
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Molecular mapping of the Pl(16) downy mildew resistance gene from HA-R4 to facilitate marker-assisted selection in sunflower.
TL;DR: This is the first report to provide two tightly linked markers for both the Pl16 and Pl13 genes, which will facilitate marker-assisted selection in sunflower resistance breeding, and provide a basis for the cloning of these genes.