Molecular and General Genetics MGG

, Volume 260, Issue 1, pp 9–19

Polymorphism of insertion sites of Ty1-copia class retrotransposons and its use for linkage and diversity analysis in pea

  • T. H. N. Ellis
  • S. J. Poyser
  • M. R. Knox
  • A. V. Vershinin
  • M. J. Ambrose
ORIGINAL PAPER

DOI: 10.1007/PL00008630

Cite this article as:
Ellis, T., Poyser, S., Knox, M. et al. Mol Gen Genet (1998) 260: 9. doi:10.1007/PL00008630

Abstract

A sample of 15 cultivars and 56 Pisum accessions from the JIC germplasm core collection has been studied using a modification of the SSAP (sequence-specific amplification polymorphisms) technique; the specific primer was designed to correspond to the polypurine tract (PPT) of PDR1, a Ty1-copia group retrotransposon of pea. Most of these SSAP products were shown to be PDR1 derived. The PDR1 SSAP markers are more informative than previously studied AFLP or RFLP markers and are distributed throughout the genome. Their pattern of variation makes them ideal for integrating genetic maps derived from related crosses. Data sets obtained with AFLP and PDR1 SSAP markers were used to construct neighbour-joining trees and for principal component analysis. These data sets give greater resolution than hitherto available for the characterisation of variation within Pisum, showing that the genus has three main groups: P. fulvum, P. abyssinicum and all other Pisum spp. P. abyssinicum is not a subgroup of cultivated P. sativum, as was previously thought, but has probably been domesticated independently. Modern cultivars are shown to form a single group within Pisum as a whole.

Key words Pea (Pisum) Ty1-copia retroelements Genetic diversity Linkage map Anchored PCR 

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • T. H. N. Ellis
    • 1
  • S. J. Poyser
    • 1
  • M. R. Knox
    • 1
  • A. V. Vershinin
    • 1
  • M. J. Ambrose
    • 1
  1. 1.Department of Applied Genetics, John Innes Centre Colney Lane, Norwich NR4 7UH, UK Fax: +44-1603-456844; e-mail: ellisn@bbsrc.ac.ukGB

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