Potato pp 375-391 | Cite as

Variation in Tubers in Single Cell-Derived Clones of Potato in Ireland

  • A. C. Cassells
  • S. Austin
  • E. M. Goetz
Part of the Biotechnology in Agriculture and Forestry book series (AGRICULTURE, volume 3)

Abstract

Sporting in potato is recognized as a problem in seed tuber production where roguing of off-types is mandatory (de Bokx 1972). The frequency of sports, i.e. phenotypic variants, reported in the field is relatively high in potato (Mcintosh 1945; Bald 1950). Much cryptic variation, however, goes undetected. Sports represent the expression of only a small percentage of somatic cell mutations, since for expression as sports, mutant cells must normally be incorporated into apical or axillary bud development and expressed in stems originating from the latter. For this criterion to be satisfied, the mutant cell(s) must displace the cells in one or more of the somatic layers (Clowes 1961) giving rise to sectorial/mericlinal, or periclinal chimeras or, if all these normal somatic cell layers are affected, to solid mutant (non-chimeric) shoots. These possibilities are illustrated in Fig. 1. Since somatic cell layer II (LII) contributes to germ cell development, only mutations in the LII may also be heritable.

Keywords

Nicotine Electrophoresis Folic Acid Mannitol Naphthalene 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • A. C. Cassells
    • 1
  • S. Austin
    • 1
  • E. M. Goetz
    • 1
  1. 1.Department of Plant ScienceUniversity CollegeCorkIreland

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