Ty1-copia-retrotransposon behavior in a polyploid cotton.
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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
complete list of authors
Hanson, RE||Islam-Faridi, MN||Crane, CF||Zwick, MS||Czeschin, DG||Wendel, JF||McKnight, TD||Price, HJ||Stelly, DM