SCREENING OF POTATO VARIETIES AND GERMPLASM AGAINST LATE BLIGHT DISEASE (original) (raw)
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Screening of potato germplasm against late blight disease
Late blight of potato, caused by Phytophthora infestans (Mont.) de Bary, is one of the most important diseases of potato (Solanum tuberosum L.) in all potato growing areas of Pakistan. Field experiments were conducted to screen out eighteen potato varieties against late blight. Most of the potato varieties showed susceptibility to P. infestans. During the year 2014-2015 only two varieties i.e NARC 39012-96 and FD 69-2 were found resistant. Three varieties/lines showed moderately resistant reaction. Three varieties/lines were categorized as moderately susceptible. Nine varieties/lines expressed susceptible response while five varieties/lines exhibited highly susceptible response. During the year 2015-2016 only one variety i.e FD 73-73 was found resistant while all other varieties/lines were moderately resistant to highly susceptible. Resistant source can be incorporated in breeding program to develop high yielding resistant variety of potato in future.
SCREENING POTATO GERMPLASM FOR STABLE RESISTANCE AGAINST LATE BLIGHT (PhytoPhthora infestans)
Potato Journal, 2012
Fifty-three germplasm accessions of potato were screened at three locations viz., Kufri, Shillong and Ooty for late blight resistance from 2004 to 2008. Thirty-seven lines showed resistance against late blight at Kufri while seventeen and fifteen lines showed resistance at Shillong and Ooty, respectively. Eleven accessions showed resistance to late blight at two locations while twenty lines were resistant at only one location. The accessions CP1673, CP2011, CP2068, CP2132 and CP2333 showed resistance against late blight at all the locations along with desirable tuber characters and can be utilized as parents for transferring stable late blight resistance in varietal breeding programme.
Epidemics of late blight of potato caused by Phytophthora infestans have induced significant yield losses in the past and still a major threat to potato production in Pakistan. Potato germplasm comprising fifty-seven lines/ varieties were evaluated for their tolerance to late blight disease. Results revealed that twenty-seven varieties / lines were rated as highly resistant to disease resistant. All these cvs / lines exhibited 0.1 to 10% disease incidence. Espirit, FD 9616, Orla, 396240-181and 394032-6 showed moderately resistant (10 -25% disease incidence) , TPS 9802, Lady Jo, 396240-21 and FD8-1 expressed moderately susceptible response (25-50% disease incidence). While three varieties such as FD 49-62, Hermes and Symphonia Red exhibited susceptible to disease with 50 -75 % disease incidence.
Analele Universităţii din Craiova, 2022
Late blight (Phytophthora infestans) of potato is considered one of the most devastating plant diseases in the world. Most cultivated potatoes are susceptible to this disease. To NIRDPSB Brasov thirteen potato genotypes (leaves and tubers) were evaluated in laboratory conditions for phenotypic scoring against late blight. Isolates were collected from the greenhouse and inoculated with a complex race of late blight differentials (R1-R11). The best results both at the leaf and tuber level were obtained with the genotypes Sasa (R3) x Rustic (Cl1), Agria x Rustic (Cl 1), Sasa x Fribel and Sasa x Florice which provided a durable source of resistance and can be used in a future breeding program. Instead, the genotypes Sasa (R6) x Orchestra, Sasa (R8) x Orchestra, Sasa (R3) x Orchestra, Sasa (R7) x Orchestra showed sensitivity to the action of the pathogen.
Eighty-eight accessions of potato (Solanum tuberosum L.) imported from 15 countries were evaluated for resistance to late blight at Central Potato Research Station, Shillong, during 2006-2010. Under laboratory testing, seven lines were found resistant, 11 moderately resistant and 70 susceptible, while under field testing under natural epiphytotic conditions, 10 accessions were found to be resistant, 18 moderately resistant and 60 susceptible to late blight. Fifty-nine lines exhibited late blight resistance at par while the rest showed different reactions under both laboratory and field testing. The average relative AUDPC value ranged from 11.86 (CP 2163) to 83.14 (CP 2294) among exotic accessions, while it was 10.5 in resistant check, Kufri Girdhari. Potato accessions, viz. CP 1722, CP 2000, CP 2011, CP 2163 and CP 2379 which showed resistance to late blight both under laboratory and field conditions were shortlisted. These accessions possess acceptable tuber traits having medium to...
Comparison of Late Blight Resistance and Yield of Potato Varieties
Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences, 2013
Growing more resistant potato varieties is one of the most effective strategies to control late blight, to protect potato yield and to prevent harming the environment. The main aim of our study was to identify potato varieties with higher resistance to late blight and which were high yielding in Estonian conditions and suitable for organic farming. During the three-year trial, twelve potato varieties were tested at the Jõgeva Plant Breeding Institute (PBI) in 2010-2012. Foliage late blight (Phytophtora infestance (Mont) de Bary) and yield were estimated. First infection of late blight occurred in different times during the trial years. The three-year average infection level indicated that early varieties ‘Arielle’, ‘Impala’ and ‘Princess’ were more damaged than other varieties in the first estimation. Late varieties ‘Ando’, ‘Anti’, ‘Juku’ and ‘Sarme’ had higher late blight resistance. Their foliage damage remained less than 30% in the last estimation. The new medium variety ‘Teele’ ...
Resistance of potato genotypes to late blight
Revista Caatinga
Late blight (Phytophthora infestans) is a serious problem in potato crops in southern Brazil due to favorable climatic conditions for the development of the pathogen and the lack of resistant cultivars available in the market. Thus, this study aimed to evaluate the reaction of eight cultivars (Asterix, Catucha, BRS Clara, BRS F63 - Camila, Cristal, BRS F183 - Potira, Markies, and BRS Pérola) and five advanced clones (F05-11-03, F21-07-09, Odone 80-02, F50-08-01, and F63-10-07) to late bight under field conditions. The Agata and the clone CIP392.617-54 were used as susceptible and resistant controls, respectively. The experiments were conducted in the municipality of Pelotas, RS, in the autumn season of 2018 and 2019. Sixty days after planting, the plants were inoculated with the pathogen; and, after one week, the genotypes were evaluated for disease severity and the area under the disease progress curve. ‘Catucha’ was classified as resistant to moderately resistant to P. infestans; ...
Susceptibility Behavior of Different Potato Accessions Against Phytophthora Infestans
Asian Journal of Agriculture and Food Sciences, 2013
Late Blight of potato (Phytophthora infestans) remains the major disease throughout the world. To check the resistance/ susceptibility, thirty potato genotypes were planted for screening against late blight disease at Potato Research Institute, Sahiwal during the year 2010-11. Outbreak of late blight of potato caused by Phytophthora infestans have induced significant yield losses in the past and still a major threat to potato production in Pakistan. Potato genotypes were evaluated for their tolerance to late blight disease. Results revealed that eighteen genotypes expressed resistant response towards disease whereas two genotypes i.e. FD 8-1, and FD 52-2 showed moderately resistant. Similarly the genotype SH-70 exhibited moderately susceptible and four genotypes i.e. FD 49-62, FD 19-2, SH-473 and Hermes showed susceptible response towards disease. Hence it is concluded that the resistant genotypes could be used as a source in future potato breeding projects against phytophthora infestans..