Ty1-copia-retrotransposon behavior in a polyploid cotton

Chromosome Res. 2000;8(1):73-6. doi: 10.1023/a:1009239522541.

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.

MeSH terms

  • Gossypium / genetics*
  • In Situ Hybridization, Fluorescence
  • Polyploidy*
  • Retroelements*

Substances

  • Retroelements