Antonio Garayalde

Antonio Garayalde
Universidad Nacional del Sur | UNS · Departamento de Matemática

PhD

About

15
Publications
1,529
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101
Citations

Publications

Publications (15)
Poster
Downy mildew (DM) of sunflower is a devastating disease caused by Plasmopara halstedii (Farl.) Berl. and de Toni. In Argentina, the prevalence and incidence of DM has increased in the last decade. The present study: i) compiles information from private and public organisms to assess the race spectrum of DM and its evolution during the last three de...
Conference Paper
Full-text available
a) Race determination of P. halstedii isolates Fig. 1. A= recovery of inoculum at field B= detail of leaf sporulation C= spore solution D= reinfection of differential set of sunflower inbred lines E= phenotyping and race determination. b) SSR analysis The isolates were analyzed by eight loci SSR. The number of alleles per locus (APL), the expected...
Article
Full-text available
Hairy vetch (Vicia villosa ssp. villosa Roth) is native of Europe and Western Asia and it is the second most cultivated vetch worldwide. Hairy vetch is used as forage species in semiarid environments and as a legume cover crop in sub-humid and humid regions. Being an incompletely domesticated species, hairy vetch can form spontaneous populations in...
Article
The objective of this work was to find practical procedures to overcome methodological drawbacks encountered during studies on sunflower downy mildew. Techniques for recovering living isolates of Plasmopara halstedii from the field and for the preservation of infected leaf samples for further molecular analysis were developed. A Polymerase Chain Re...
Article
Full-text available
Invasive plants represent a valuable model system for studying contemporary evolution and predicting evolutionary responses to global climate change. Rapid adaptation to climate during range expansion has been recently recognised as a major factor in biological invasions. In this study, by using complementary approaches (common garden studies and t...
Article
Langdon(Dic-3A)-10 line carrying the QTL Qfhs.ndsu-3AS from T.Turgidum ssp. dicoccoides that confers Type II resistance to Fusarium head blight (FHB) was crossed with Argentinean durum wheat cultivars. F4 progeny were screened with the microsatellite locus Xgwm2, tightly linked to the Qfhs.ndsu-3A region. Reaction of these plants and parents to FHB...
Article
Panicum coloratum var. makarikariense, a perennial grass native to Africa, is adapted to a wide range of soil and climatic conditions with potential to be used as forage in tropical and semi-arid regions around the world. Our objective was to understand how the pollination mode affects viable seed production and further survival of the progeny. We...
Poster
Full-text available
Desde 2013 se observa un incremento de mildiu de girasol por Plasmopara halstedii en SE de Bs As y N de Santa Fé. Esto se atribuye a cambios genéticos del patógeno que confirieron tolerancia al curasemilla metalaxyl y/o superaron algunos genes Pl de resistencia de los híbridos cultivados. Ante este problema, se ha conformado una red compuesta por e...
Article
Full-text available
Summary. Fusarium head blight (FHB), caused by Fusarium graminearum Schwabe, is a wheat disease that causes yield losses and mycotoxin accumulation in the grain. In germplasm of durum wheat (Triticum turgidum L. ssp. durum), genetic variability for resistance is scarce. To develop an improved assay for FHB resistance in wheat, we evaluated the effe...
Article
Panicum coloratum var. makarikariense is a perennial C4 grass native to South Africa with relatively good forage production under limited-resource conditions. Genetic characterisation and breeding efforts have been scant, thus limiting its use in cattle raising systems. The goal of the present study was to assess the genetic diversity of a collecti...
Article
Male sterile (MS) plants fail to produce functional anthers, pollen, or male gametes. This condition is useful in sunflower hybrid seed production. A MS form identified in an invasive population of H. annuus located in Las Malvinas was characterized by 37 morphological variables, six mitochondrial genes (atpA, atp6, coxIII, orfb, orfB and orfC) ass...
Article
Wild sunflower Helianthus annuus originates from North America and has naturalised in Argentina where it is considered invasive. The present study attempts to assess the genetic diversity using two different molecular marker systems to study the wild genetic patterns and to provide data applicable to conservation and breeding uses. Ten natural popu...
Article
Full-text available
Wild Helianthus annuus naturalized in Argentina could be a valuable germplasm source for cultivated sunflower. Five wild populations collected in different environments and with different phenotype expression were evaluated as a genetic resource in a common garden study. The populations showed normal meiosis and produced a good seed set when their...

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Projects

Project (1)
Project
To know the genetics of the current races of the pathogen in Argentina. Do a survey of the curent pathotypes and a molecular characterization using tools like sequencing.