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Shimla, India

Sharma A.K.,ICAR CPRI | Pandey K.K.,ICAR CPRI
Indian Journal of Agricultural Sciences | Year: 2016

Storage, sprouting and production behaviour of different grades of potato mini-tubers of cv. Kufri Girdhari produced during summer (Kharif) and autumn seasons in high hills of north-western Himalaya (9 000 feet amsl) was studied. The study revealed that mini-tubers produced during both the seasons in the high hills store well under ambient conditions till the next potato planting season, i.e. April. Number of sprouts and length of longest sprout per mini-tuber as well as average weight per tuber at the end of storage period was affected significantly by the season of production as well as grade of mini-tubers. However, total physiological loss in weight of mini-tubers from two seasons was almost same but was affected significantly by the grade of mini-tuber. Mini-tubers from both the seasons resulted in same yield and number of tubers per hectare. A gradual and consistent increase in the number of tubers as well as in potato yield with the increasing size of mini-tuber was noticed. Similar field productivity of mini-tubers from two seasons is in total support of the practice of taking two crops of mini-tubers (from in vitro plantlets) under protected conditions. The information generated will be helpful in boosting the fast multiplication of elite planting material of potato in the high hills of north western Himalaya. © 2016, Indian Council of Agricultural Research. All rights reserved. Source

Lal M.,ICAR CPRI Campus | Sharma S.,ICAR CPRI | Ahmad I.,ICAR CPRI Campus | Singh B.P.,ICAR CPRI | Yadav S.,ICAR CPRI Campus
Potato Journal | Year: 2014

Late blight is the most dreaded disease of potato throughout the world. Experiments were conducted during the years 2004-05 to 2012-13 at Central Potato Research Institute Campus, Modipuram, Meerut, Uttar Pradesh to assess late blight severity and determine yield losses for the development of yield loss assessment model. The dynamics of late blight were monitored with application of different fungicides. The model has two parameters i.e. per cent yield loss as a dependent variable and AUDPC an independent variable. Twenty five linear and non linear regression lines were fitted with three years data and best non linear reciprocal hyperbola regression line (R2 =0.84) was selected. The model revealed deviation from 0.5 to 13.70% in 2010-11, 1.16 to 9.69% in 2011-12 and-3.01 to 9.23% in 2012-13 between actual and predicted yield loss. Highest deviation (13.70%) was found in the treatment mancozeb in alternation with metalaxyl + mancozeb (2 sprays) and least in the treatment cymoxanil + mancozeb (3 sprays) treatment during 2010-11. Significant correlation was found between yield and AUDPC values. © 2014, Indian Potato Association. All rights reserved. Source

Dalamu,ICAR CPRI | Singh B.,ICAR CPRI | Gupta V.K.,ICAR CPRI Campus | Chopra S.,ICAR CPRI | And 2 more authors.
Potato Journal | Year: 2014

Phytochemicals are bioactive non-nutrient compounds with protective or disease preventive properties. Considering the importance of phytonutrients, biochemical analysis of Indian potato genotypes with diverse skin and flesh colour was performed. Significant variations in total anthocyanin, carotenoids and phenolic content were observed in tuber flesh as well as whole tuber with peel, thus edifying potato as a potential source of phytonutrients. Potato peel which accounts for only about 10% of the sample total weight has been found to have significant nutritional composition. The genotypic variations were estimated to be about 20 fold for total anthocyanin, 3 fold for carotenoid as well as phenolic content. Higher magnitude of genotypic to phenotypic variance ratios for all the three parameters signify their transmission into next generation with lesser influence of environment on their accumulation due to minor difference between phenotypic and genotypic coefficient of variation. Out of thirty two diverse genotypes tested, eight were found to be excelling in all the three phytonutrients evaluated. The potential genotypes identified in the present study can be utilised as genetic base to breed novel fortified, coloured potato varieties. The alluring tuber flesh may variegate consumer’s plate with additional health benefits. © 2014, Indian Potato Association. All rights reserved. Source

Kumar R.,ICAR CPRI | Jeevalatha A.,ICAR CPRI | Sharma N.N.,ICAR CPRI | Sharma S.,ICAR CPRI | And 2 more authors.
Potato Journal | Year: 2014

Potato aucuba mosaic virus (PAMV) is a common virus of potato crop. A high incidence of PAMV was recorded in the last decade and is since becoming a threat to the Indian seed potato production programme. Enzyme-linked immunosorbent assay (ELISA) is normally adopted for indexing of tubers and micropropagated potato plants for viruses but it could not detect PAMV due to its low titer. Therefore, six sets of primers were designed for RT-PCR amplification of conserved areas in 26kDa protein, RNA polymerase and coat protein genes of PAMV. Reverse transcription polymerase chain reaction (RT-PCR) and one step immunocapture RT-PCR (IC-RT-PCR) methods were developed for detection of PAMV from leaves and tubers. The protocols could be used for epidemiological studies, routine testing and virus indexing of mother stocks as well as for healthy seed potatoes production programme. © 2014, Indian Potato Association. All rights reserved. Source

Dua V.K.,ICAR CPRI | Govindakrishnan P.M.,ICAR CPRI | Singh B.P.,ICAR CPRI
Potato Journal | Year: 2014

A crop growth simulation model WOFOST was calibrated for four Indian potato cultivars, falling under different maturity classes i.e. late maturing (Kufri Badshah), medium maturing (Kufri Bahar and Kufri Jyoti) and early maturing (Kufri Pukhraj). The important model parameters used for calibration of WOFOST models were; thermal time from sowing to emergence, emergence to initiation of tuber growth and initiation of tuber growth to maturity, maximum leaf CO2 assimilation rate, initial light-use efficiency of CO2 assimilation of single leaf and dry matter partitioning. The model was calibrated for Indian potato cultivars with reasonable accuracy. Simulated values for emergence, initiation of tuber growth and physiological maturity varied between 0 to 2, 1 to 8 and 5 to 12 days, respectively, from the measured values, for different cultivars. Variation in final dry matter yield ranged from 5.6 to 7.5%, which was within the acceptable limits. The indicators of model performance also showed that the model performance was satisfactory. The results demonstrated that the WOFOST model can be used for potato crop under Indian situation. However model needs to be validated for various conditions before it is widely used. © 2014, Indian Potato Association. All rights reserved. Source

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