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Advances in Agriculture
Volume 2015 (2015), Article ID 327969, 4 pages
http://dx.doi.org/10.1155/2015/327969
Research Article

Fine Screening for Resistance to Cold-Induced Sweetening in Potato Hybrids Containing Solanum raphanifolium Germplasm

1Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
2USDA Agricultural Research Service and University of Wisconsin-Madison, 1575 Linden Drive, Madison, WI, USA

Received 29 April 2015; Accepted 9 June 2015

Academic Editor: Philippe Giordanengo

Copyright © 2015 Arfan Ali and Shelley Jansky. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Potato is an indispensable part of human food. Many wild and cultivated potato relatives have been screened to find the best germplasm to improve productivity and quality, but only a small sample of the available biodiversity has been exploited. Most wild relatives are self-incompatible diploids. Genetic variability exists within and among populations, even within a species. Therefore, it is necessary to carry out fine screening to identify individuals carrying traits of interest. This study was carried out to quantify phenotypic variability for resistance to cold-induced sweetening, an important processing trait. Five families were evaluated for potato chip (crisp) color following cold storage of tubers harvested from four greenhouse trials and one field trial. The families were generated by crossing a single diploid clone to five plants from one accession of the wild potato relative Solanum raphanifolium. Analysis of variance revealed that resistance against cold-induced sweetening was dependent on family and trial. This study underscores the importance of fine screening to select individuals in potato accessions for use in potato improvement.