DEGENERATION OF POTATO VARIETIES DUE TO VIRUS INCIDENCE IN NORTH GUJARAT

Jigneshkumar Kanaiyalal Patel; RAMJIBHAI NARSINHBHAI PATEL; Dalsukhbhai Manjibhai Zapadiya; Shravansinh Jamatsinh Vaghela

doi:10.56093/potatoj.v51i2.150501

Authors

J K Patel Sardarrushinagar Dantiwada Agriculture University
R N PATEL Sardarkrushinagar Dantiwada Agricultural University
D. M. Zapadiya Sardarkrushinagar Dantiwada Agricultural University
S. J. Vaghela Sardarkrushinagar Dantiwada Agricultural University

https://doi.org/10.56093/potatoj.v51i2.150501

Keywords:

Degeneration, potato, virus, PLRV, Mosaic, tuber yield

Abstract

The physiological causes and viral disease infections are the two main reasons for potato degeneration. The
seed potato infected with viral diseases degenerate in the following successive generations therefore the investigation was
carried out to evaluate the most popular potato varieties of Gujarat i.e. K. Badshah and K. Khyati against viruses (PLRV,
mild mosaic & severe mosaic) and their subsequent degenerative effects on yield with comparison to fresh breeder seed.
The three treatments viz., T1: Fresh breeder seed every year, T2: Previous seed produce using seed plot technique, T3:
Previous seed produce without seed plot technique were evaluated. The studies were conducted for four consecutive years
during rabi 2017-2021. The results revealed significantly higher per cent plant emergence at 40 DAP was recorded in T1
(Fresh breeder seed every year) and T2 (Previous seed produce using seed plot techniques) in all years as compared to T3
(Previous seed produce without seed plot techniques). The per cent incidence of viral diseases at 75 DAP was recorded
highest (mild mosaic:16.67 %, severe mosaic: 17.67 and PLRV 21.83 in last year) in T3 i.e. Previous seed produce without
seed plot techniques. Comparatively lower per cent incidence of viral diseases (mild mosaic:10.67 %, severe mosaic: 7.33 and
PLRV 13.33 in last year) was recorded in T2 i.e. Previous seed produce using seed plot techniques and the least incidence
of viral diseases (Mild mosaic:1.83 %, Severe mosaic: 1.67 and PLRV 1.67 in last year) was recorded in T1 i.e. Fresh breeder
seed every year. The total tuber yield was higher in first two year in breeder as well as SPT raised seed. In Successive
years the SPT raised seed tuber yield decrease. So, based on results it is concluded that seed producer can produce quality
seed tuber from breeder seed up to three consecutive years by using “Seed Plot Technique”.

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