Abstract
The line IvP35 of the diploid (2n=2x=24) cultivated potato species Solanum phureja (family Solanaceae) expresses hypersensitive resistance (H) to potato X potexvirus (PVX). In this study, a diploid potato population was produced using IvP35 as the male parent and a diploid line of S. tuberosum (87HW13.7) as the female parent and tested for resistance to PVX. Data indicated that H to PVX in IvP35 is a dominant, monogenically inherited trait controlled by a single gene, named Nx phu , that is in a simplex condition (Nxnx). RFLP analysis carried out on the progeny lines revealed 4 markers (CT220, TG328, CT112 and TG424) from the long arm of chromosome IX that were linked to the hypersensitive phenotype; the closest linkage was observed with the marker TG424. Previous authors have shown that the same region of chromosome IX contains the gene Sw-5 for resistance to tomato spotted wilt tospovirus in Lycopersicon peruvianum (Solanaceae).
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 18 September 1997 / Accepted: 24 November 1997
Rights and permissions
About this article
Cite this article
Tommiska, T., Hämäläinen, J., Watanabe, K. et al. Mapping of the gene Nxphu that controls hypersensitive resistance to potato virus X in Solanum phureja IvP35. Theor Appl Genet 96, 840–843 (1998). https://doi.org/10.1007/s001220050810
Issue Date:
DOI: https://doi.org/10.1007/s001220050810