Theoretical and Applied Genetics

, Volume 119, Issue 6, pp 973–989

LTR-retrotransposons Tnt1 and T135 markers reveal genetic diversity and evolutionary relationships of domesticated peppers

  • Sheh May Tam
  • Véronique Lefebvre
  • Alain Palloix
  • Anne-Marie Sage-Palloix
  • Corinne Mhiri
  • Marie-Angèle Grandbastien
Original Paper

DOI: 10.1007/s00122-009-1102-6

Cite this article as:
Tam, S.M., Lefebvre, V., Palloix, A. et al. Theor Appl Genet (2009) 119: 973. doi:10.1007/s00122-009-1102-6

Abstract

Plant genetic resources often constitute the foundation of successful breeding programs. Pepper (Capsicum annuum L.) is one of the most economically important and diversely utilized Solanaceous crop species worldwide, but less studied compared to tomato and potato. We developed and used molecular markers based on two copia-type retrotransposons, Tnt1 and T135, in a set of Capsicum species and wild relatives from diverse geographical origins. Results showed that Tnt1 and T135 insertion polymorphisms are very useful for studying genetic diversity and relationships within and among pepper species. Clusters of accessions correspond to cultivar types based on fruit shape, pungency, geographic origin and pedigree. Genetic diversity values, normally reflective of past transposition activity and population dynamics, showed positive correlation with the average number of insertions per accession. Similar evolutionary relationships are observed to that inferred by previous karyosystematics studies. These observations support the possibility that retrotransposons have contributed to genome inflation during Capsicum evolution.

Supplementary material

122_2009_1102_MOESM1_ESM.pdf (67 kb)
Supplementary Fig. 1 (PDF 66 kb)

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Sheh May Tam
    • 1
    • 3
  • Véronique Lefebvre
    • 2
  • Alain Palloix
    • 2
  • Anne-Marie Sage-Palloix
    • 2
  • Corinne Mhiri
    • 1
  • Marie-Angèle Grandbastien
    • 1
  1. 1.Laboratoire de Biologie Cellulaire, UR501, Institut Jean-Pierre Bourgin, INRAVersailles CedexFrance
  2. 2.Unité de Génétique et Amélioration des Fruits et Légumes, UR 1052, INRAMontfavet CedexFrance
  3. 3.School of ScienceMonash University MalaysiaBandar SunwayMalaysia