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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(11): 1923-1931
DOI: https://doi.org/10.20546/ijcmas.2019.811.226


Performance Assessment of Native Tomato Genotypes to Late Blight Disease under Natural Epiphytotics
Raghuveer Singh1*, N. Tiameren Ao2, Valenta Kangjam2, N. Bidyaleima Chanu3, L. Daiho2 and Susanta Banik2
1ICAR Research Complex for NEH Region, A.P. Centre, Basar-791101, Arunachal Pradesh, India
2Department of Plant Pathology, SASRD, Nagaland University, Medziphema Campus-797106, Nagaland, India
3Department of Vegetable Science, College of Horticulture & Forestry, CAU, Pasighat-791102, Arunachal Pradesh, India
*Corresponding author
Abstract:

A field study conducted to evaluate the native tomato genotypes for their resistance to late blight under natural epiphytotics conditions was carried out during 2017-18 and 2018-19. Twenty native tomato genotypes were collected from different tomato growing areas of Nagaland, Manipur and Arunachal Pradesh. Characteristics of tomato genotypes revealed that most of the collected genotypes were indeterminate in nature except Pusa Ruby (semi-determinate), Arka Rakshak, F1 hybrid (determinate) and T2 (determinate). The late blight disease severity was assessed visually on stems, leaves and fruits of all plants of each replication following scale 0-5, when total late blight infestation had occurred in the control plot. Disease severity data revealed that least PDI was recorded in T3 (16.81) and T17 (35.99) whereas highest PDI was recorded in Arka Rakshak, with 89.72. This experimental result revealed that most of the genotypes (20 genotypes) reacted as highly susceptible, while T3 (16.81 PDI) and T17 (35.99 PDI) was found resistant and tolerant respectively. These results clearly indicate that a good source of resistance to late blight is available in the genotype T3 (cherry tomato). The resistant genotype thus obtained through this experiment shows a potential disease resistance trait contributor for tomato breeding against late blight disease.


Keywords: Resistance, Late blight, Natural epiphytotics conditions, Native tomato genotypes
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How to cite this article:

Raghuveer Singh, N. Tiameren Ao, Valenta Kangjam, N. Bidyaleima Chanu, L. Daiho and Susanta Banik. 2019. Performance Assessment of Native Tomato Genotypes to Late Blight Disease under Natural Epiphytotics.Int.J.Curr.Microbiol.App.Sci. 8(11): 1923-1931. doi: https://doi.org/10.20546/ijcmas.2019.811.226