Ty1-copia-retrotransposon behavior in a polyploid cotton Academic Article uri icon

abstract

  • Retrotransposons constitute a ubiquitous and dynamic component of plant genomes. Intragenomic and intergenomic comparisons of related genomes offer potential insights into retrotransposon behavior and genomic effects. Here, we have used fluorescent in-situ hybridization to determine the chromosomal distributions of a Ty1-copia-like retrotransposon in the cotton AD-genome tetraploid Gossypium hirsutum and closely related putative A- and D-genome diploid ancestors. Retrotransposon clone A108 hybridized to all G. hirsutum chromosomes, approximately equal in intensity in the A- and D-subgenomes. Similar results were obtained by hybridization of A108 to the A-genome diploid G. arboreum, whereas no signal was detected on chromosomes of the D-genome diploid G. raimondii. The significance and potential causes of these observations are discussed.

author list (cited authors)

  • Hanson, R. E., Islam-Faridi, M. N., Crane, C. F., Zwick, M. S., Czeschin, D. G., Wendel, J. F., ... Stelly, D. M.

citation count

  • 46

publication date

  • March 2000

keywords

  • Evolution
  • Genome
  • Gossypium
  • Polyploidization
  • Repetitive Element
  • Retrotransposon