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Early selection for extreme resistance to potato virus Y and tobacco etch virus in potato using a β‐glucuronidase‐tagged virus
Author(s) -
HinrichsBerger J.,
Junghans H.,
Buchenauer H.
Publication year - 2000
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1046/j.1439-0523.2000.00485.x
Subject(s) - potato virus y , biology , tobacco etch virus , solanum tuberosum , potato virus x , gene , virus , inoculation , cultivar , potyvirus , solanaceae , beta glucuronidase , horticulture , virology , plant virus , genetics , gene expression
The Ry sto gene from Solanum stoloniferum introduced into potato cultivars ( Solanum tuberosum L. ssp. tuberosum ) confers resistance to potato virus A, potato virus V and potato virus Y (PVY). In addition to PVY, tobacco etch virus (TEV) and a TEV construct that encodes β‐glucuronidase (TEV‐GUS) were inoculated to determine the inheritance of resistance to these viruses in progenies obtained from potato cultivars containing the Ry sto gene. While cultivars ‘Karlena’ and ‘Delikat’ were susceptible, ‘Bettina’ and clone 927eY were resistant to PVY, TEV and TEV‐GUS, as determined by enzyme linked immunosorbent assay, biotest and GUS assay, respectively. The segregation ratios obtained from the progenies of ‘Bettina’בDelikat’ and 816eY בKarlena’ indicate that resistances to PVY and TEV are governed by one dominant gene or two genes tightly linked in coupling phase. Evidently, Ry sto confers broad spectrum resistance to potyviruses. TEV resistance could be reliably detected 4 days after inoculation with the TEV‐GUS construct by GUS assay. Therefore, the GUS‐tagged TEV construct can be used for early selection for resistances based on the gene Ry sto or closely linked genes.