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Periderm cell size as a ploidy indicator in potato (Solatium tuberosum L. subspecies tuberosum)
Author(s) -
DE M J
Publication year - 1998
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1998.tb05830.x
Subject(s) - solanum tuberosum , biology , ploidy , subspecies , cell size , solanaceae , botany , cultivar , horticulture , industrial crop , genetics , microbiology and biotechnology , gene , paleontology
Summary. Using the tubers of glasshouse‐grown potato plants, periderm cell dimensions were found to indicate ploidy in comparisons of Solanum tuberosum subspecies tuberosum dihaploids and their somatically‐chromosome‐doubled derivatives. The mean ratio of dihaploid to tetraploid cell sizes, determined as the product of cell length x breadth, was 0.60:1. There were differences between 34 tetraploid cultivars in their mean periderm cell sizes and between clones within six dihaploid families derived parthenogen‐etically from tetraploids. There was variation in mean cell size but dihaploid cells were always smaller than those of their parents. The mean cell size of the parent was usually in the next highest size class of its largest‐celled dihaploids. As there was overlap between dihaploid and tetraploid ranges it was concluded that in order to identify dihaploids the mean cell size in tubers of the parent grown under the same conditions should be used for comparison. Clones with mean periderm cell sizes no greater than 60% of the parent's cell size could be provisionally classed as dihaploid.