Evaluation of exotic potato genotypes for late blight [Phytophthora infestans (Mont.) de Bary] resistance (original) (raw)
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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.
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.
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..
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; ...
Revista de Ciencias Agrícolas 40(1), 2023
Potato (Solanum tuberosum L.) cultivation is an important agricultural activity in the Andean region. The late blight Phytophthora infestans (Mont.) de Bary, considered one of the limiting diseases in production, represents a threat to food security and causes losses ranging from 30 to 100% of yield. This research evaluated the response to the disease in four commercial materials widely planted in the department of Nariño. The evaluation was carried out under field conditions, in the municipality of Pasto, at AGROSAVIA's Obonuco research center, with natural inoculum, under a randomized complete block design with four replications. The response variables evaluated were incidence, severity, leaf area index and yield in the commercial categories. The ICA Única variety, reported as highly resistant in 2001, presented damage levels close to 75%, with a yield reduction of 49.88%, caused mainly by low yields of first category tubers, indicating a loss of its level of resistance, with damage levels similar to the highly susceptible control Diacol Capiro, which presented 100% of the area with symptoms of the disease and a reduction of 89% in yield. The genotypes Pastusa Suprema with disease tolerance characteristics and Superior showed the best performance with a severity level of 30% in each case and yield reductions of 30.5% and 40.92%, respectively. The results highlight the importance of these genotypes and their role as pillars in the integrated management of the disease through the planting of varieties with favorable behavior against the disease.
Advances in Cytology & Pathology
Seven local potato cultivars along with two checks (Kufri Jyoti and Janakdev) were evaluated for their resistance against late blight caused by Phytophthora infestans in 2016 at Pakhribas, Dhankuta, Nepal under field and laboratory conditions. Field experiment was conducted under natural epiphytotic conditions. Laboratory experiments included detached leaf and tuber slice assays under artificially inoculated conditions. In the field, Lumle Kalo and Janakdev showed resistant reaction while cultivars Hale, Rato, Lumle Seto, Kalo and Seto-moderately resistant, and Phulsusceptible to late blight. In detached leaf assay, Janakdev showed highly resistant reaction; Kalo-resistant; Lumle Kalo and Hale-moderately resistant; and Lumle Seto, Rato, Seto and Phul-susceptible reactions. In tuber slice assay, Kalo, Lumle Kalo, Phul and Rato showed resistant reaction; Janakdev and Seto-moderately resistant; and Hale and Lumle Seto-susceptible. The check cultivar Kufri Jyoti gave highly susceptible reactions in all the experiments. Susceptibility levels measured in the detached leaf assay was highly correlated (r =0.70) with converted field scale values, although the correlation was lower for the tuber slice assay (r =0.58). Low correlation in the tuber assay may have also reflected genetic systems and/or structural differences as foliage and tuber blight resistance are not always correlated. Lumle Kalo can be utilized as source of resistance against late blight for breeding and general cultivation by farmers of Pakhribas and similar conditions.
Late blight disease caused by Phytophthora infestans (Mont.) de Bary is one of the major diseases of economic importance to potato production in Uganda causing yield losses of 40 to 60%. Use of host resistance is most economical and environmentally feasible solution to control this disease. This study was carried out to identify potato clones with high levels of field resistance to late blight pathogen (P. infestans) and high yields so that well adapted and tolerant clones could be developed and released as varieties. Sixteen potato clones of population B3C2 were accessed from International Potato Centre (CIP) in Lima Peru and evaluated for field resistance to late blight pathogen population in Uganda. Six potato clones (396027.205, 396034.103, 396026.103, 393280.82, 396038.107, and 395015.6) out of 16 clones were identified to posses high field resistance to late blight and high yields. The mean late blight disease severity measured as relative area under disease progress curve (rAUDPC) ranged between 15 to 38% for no sprayed while for sprayed it ranged from 5 to 22%. Yield performance under no spray treatment ranged from 7 to 20 T/ha while under spray treatment, yield ranged from 13 to 25 T/ha. Four of these clones (396026.103, 396034.103, 393280.82, and 396038.107) have been recommended for release as potential varieties for farmers.