Indian Society of Genetics & Plant Breeding

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Molecular characterization of potato virus Y resistance in potato (Solanum tuberosum L.)

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Amongst viruses, Potato virus Y (PVY) is the most prevalent
virus affecting potato productivity. Resistance genes (Ry)
in Solanum tuberosum subsp. andigena (Ryadg) and
Solanum stoloniferum (Rysto) confer extreme resistance
(ER) to PVY. SCAR marker RYSC3 for Ryadg gene and SSR
marker STM0003 for Rysto gene were used to screen 119
potato genotypes including 44 Indian varieties. These
genotypes were also challenge inoculated with PVYo strain
and confirmed for ER by DAS-ELISA. Gene Ryadg was
present in 11 and Rysto in 22 genotypes, while 3 genotypes
possessed both the genes. The statistical analysis indicated
that among the two tested markers, RYSC3 is better
diagnostic of PVY resistance. The identified genotypes can
serve as potential source for future virus resistance
breeding programs.

Keywords: Potato virus Y, MAS, extreme resistance gene, S. tuberosum, S. stoloniferum

Info

Year: 2015
Volume: 75
Issue: 3
Article DOI: 10.5958/0975-6906.2015.00062.0
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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