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Author: Phillip Mark Baldauf
Publisher:
ISBN: 9780549652397
Category :
Languages : en
Pages : 185
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Book Description
Potato viruses cause significant potato yield loss world wide. It is important to understand the nature of the potato virus populations present in a geographical region in order to develop appropriate control strategies. A wide-ranging survey of potato viruses in potatoes being grown in the northeastern USA had never been done. A survey of six potato viruses, Potato virus A (PVA), Potato virus M (PVM), Potato virus S (PVS), Potato virus X (PVX), Potato virus Y (PVY), and Potato leafroll virus (PLRV), was conducted in New York and Maine during 2002 and 2003. Leaf samples were tested by ELISA and PVY-positive samples were further tested to determine if a necrotic strain of PVY (PVYN, PVYN:O, or PVYNTN) was present. In both years, PVY and PVS were identified in a majority of the samples, and mixed infections predominated in 83% of the symptomatic leaves in 2002. Of the total 394 PVY-positive samples, three reacted with monoclonal antibody (MAb) 1F5 and caused veinal necrosis (VN) in tobacco. Two of these isolates caused tuber necrosis in the potato cv. Yukon Gold. Three PVY isolates reacted with MAb 1F5 but did not cause VN in tobacco, and two caused VN but did not react with MAb 1F5. Two of the necrotic PVY isolates collected, along with a PVYO isolate, were used to conduct multi-year experiments to determine the impact of PVY strain, potato cultivar, and time of infection on marketable yield and tuber infection efficiency. It was found that final disease incidence in the field could not be used to predict tuber infection, as inoculated plants testing negative in the field produced infected tubers. PVY infection decreased marketable yield, but yield was dependent on the potato cultivar and inoculation time. PVY infected between 25 and 100% of the marketable tubers. Our results suggest that, compared with other isolates, necrotic strains of PVY might be less effectively removed in seed potato production systems and this may explain the emergence of necrotic strains.
Author: Phillip Mark Baldauf
Publisher:
ISBN: 9780549652397
Category :
Languages : en
Pages : 185
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Book Description
Potato viruses cause significant potato yield loss world wide. It is important to understand the nature of the potato virus populations present in a geographical region in order to develop appropriate control strategies. A wide-ranging survey of potato viruses in potatoes being grown in the northeastern USA had never been done. A survey of six potato viruses, Potato virus A (PVA), Potato virus M (PVM), Potato virus S (PVS), Potato virus X (PVX), Potato virus Y (PVY), and Potato leafroll virus (PLRV), was conducted in New York and Maine during 2002 and 2003. Leaf samples were tested by ELISA and PVY-positive samples were further tested to determine if a necrotic strain of PVY (PVYN, PVYN:O, or PVYNTN) was present. In both years, PVY and PVS were identified in a majority of the samples, and mixed infections predominated in 83% of the symptomatic leaves in 2002. Of the total 394 PVY-positive samples, three reacted with monoclonal antibody (MAb) 1F5 and caused veinal necrosis (VN) in tobacco. Two of these isolates caused tuber necrosis in the potato cv. Yukon Gold. Three PVY isolates reacted with MAb 1F5 but did not cause VN in tobacco, and two caused VN but did not react with MAb 1F5. Two of the necrotic PVY isolates collected, along with a PVYO isolate, were used to conduct multi-year experiments to determine the impact of PVY strain, potato cultivar, and time of infection on marketable yield and tuber infection efficiency. It was found that final disease incidence in the field could not be used to predict tuber infection, as inoculated plants testing negative in the field produced infected tubers. PVY infection decreased marketable yield, but yield was dependent on the potato cultivar and inoculation time. PVY infected between 25 and 100% of the marketable tubers. Our results suggest that, compared with other isolates, necrotic strains of PVY might be less effectively removed in seed potato production systems and this may explain the emergence of necrotic strains.
Author: Christophe Lacomme
Publisher: Springer
ISBN: 3319588605
Category : Science
Languages : en
Pages : 268
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Book Description
Potato virus Y (PVY) infects a wide host range mainly within the Solanaceae and is distributed worldwide. PVY is transmitted by more than 40 aphid species in a non persistent manner. Isolates of the PVY species are highly variable at biological, serological and molecular levels. Epidemiological studies have highlighted the emergence of distinct potato PVY variants able to induce necroses on potato tubers. Due to the lack of efficient resistance to PVY isolates inducing necrotic symptoms in cultivated varieties and the plant-to-plant transmission of isolates through the daughter tubers, PVY has become the most economically important virus for the potato industry. The review offers an overview of several decades of research on PVY but also focuses on the latest data obtained by expert on PVY worldwide on the biological characteristics of PVY, interactions between aphids-hosts, its evolution and management. Identified knowledge gaps to understand further PVY biology will be discussed.
Author: Roland Sigvald
Publisher:
ISBN:
Category : Potato virus Y
Languages : en
Pages : 38
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Book Description
Author: Gad Loebenstein
Publisher: Springer Science & Business Media
ISBN: 9400708424
Category : Science
Languages : en
Pages : 479
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Book Description
This is a comprehensive up-to-date treatise including information on virus-, viroid-, and phytoplasma-induced potato diseases. The chapters of this book were written by internationally well-known experts and include novel techniques of detection, virus isolation, transmission, and epidemiology of the pathogens.
Author: Christina Diane DiFonzo
Publisher:
ISBN:
Category :
Languages : en
Pages : 274
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Book Description
Author: J. A. de Bokx
Publisher:
ISBN:
Category : Papas (Tubérculos)
Languages : en
Pages : 284
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Book Description
Characterization and identification of potato viruses and viroids; Viruses, viroids, mycoplasmas and diseases with a virus-like; Viruses and potatoes.
Author: Francisco Juan Munoz
Publisher: INIAP Archivo Historico
ISBN:
Category : Potato virus Y.
Languages : en
Pages : 136
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Book Description
Author: Shaonpius Mondal
Publisher:
ISBN:
Category : Aphids as carriers of disease
Languages : en
Pages : 270
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Book Description
Potato virus Y (PVY) and Potato leaf roll virus (PLRV) constrain potato production and are transmitted by many aphid vectors. Green peach aphid (GPA) is the most efficient vector of both viruses. The overall objective of this dissertation was to study the potato-PVY- and PLRV-aphid pathosystems. A recent concern regarding PVY is the emergence of necrotic and recombinant strains (e.g., PVYN̳:̳O̳, PVYN̳T̳N̳, PVYN̳A̳-N̳/̳N̳T̳N̳) and their impacts relative to the ordinary strain (PVYO̳) in the United States. The first study was aimed at clarifying transmission of virus strains by GPA when multiple virus strains are present in the same source tissue. The apparent primacy of PVYO̳ observed in the study suggests that GPA transmission from mixed infection does not contribute to the increasing prevalence of newer necrotic strains. The second study was aimed at understanding how necrotic PVY isolates are transmitted compared to ordinary isolates by various colonizing (GPA and potato aphid, PA) and non-colonizing aphid (bird cherry-oat aphid, BCOA) species. Although GPA transmitted PVY isolates most efficiently, BCOA transmitted PVYN̳T̳N̳ isolates with better efficiency than previously reported. BCOA is one of the most abundant aphids in potato fields in Idaho, suggesting that this species might be a contributing factor to the recent prevalence of necrotic strains. The third study was focused on the characterization of the aphid species complex over time in potato fields adjacent to cereal fields and how their transient flight might contribute to PVY incidence. A diverse fauna of non-colonizing aphid species was captured, including many cereal aphids as well as species from other crops and weeds. PVY incidence in potato increased following peak aphid flight and appeared to be related to aphid abundance. The objectives of the PLRV-aphid pathosystem study were to observe the phenology of aphid vectors and PLRV incidence among Russet Burbank, Russet Norkotah, and Ranger Russet potato varieties over the season. All varieties were found to be at similar risk of PLRV incidence and aphid vector colonization. Findings from these studies contribute to our understanding of the PVY- and PLRV-pathosystems, and their future management for the benefit of potato growers. [Underscored letters are superscript in original text.]
Author: Hugo Campos
Publisher: Springer Nature
ISBN: 3030286835
Category : Science
Languages : en
Pages : 524
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Book Description
This book is open access under a CC BY 4.0 license. This book provides a fresh, updated and science-based perspective on the current status and prospects of the diverse array of topics related to the potato, and was written by distinguished scientists with hands-on global experience in research aspects related to potato. The potato is the third most important global food crop in terms of consumption. Being the only vegetatively propagated species among the world’s main five staple crops creates both issues and opportunities for the potato: on the one hand, this constrains the speed of its geographic expansion and its options for international commercialization and distribution when compared with commodity crops such as maize, wheat or rice. On the other, it provides an effective insulation against speculation and unforeseen spikes in commodity prices, since the potato does not represent a good traded on global markets. These two factors highlight the underappreciated and underrated role of the potato as a dependable nutrition security crop, one that can mitigate turmoil in world food supply and demand and political instability in some developing countries. Increasingly, the global role of the potato has expanded from a profitable crop in developing countries to a crop providing income and nutrition security in developing ones. This book will appeal to academics and students of crop sciences, but also policy makers and other stakeholders involved in the potato and its contribution to humankind’s food security.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 886
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Book Description
