title: Ty1-copia-retrotransposon behavior in a polyploid cotton.
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.
authors.affiliation: Department of Soil and Crop Sciences, Texas A&M University, College Station 77843-2474, USA.
authors.forename: R E
authors.initials: RE
authors.lastname: Hanson
authors.forename: M N
authors.initials: MN
authors.lastname: Islam-Faridi
authors.forename: C F
authors.initials: CF
authors.lastname: Crane
authors.forename: M S
authors.initials: MS
authors.lastname: Zwick
authors.forename: D G
authors.initials: DG
authors.lastname: Czeschin
authors.forename: J F
authors.initials: JF
authors.lastname: Wendel
authors.forename: T D
authors.initials: TD
authors.lastname: McKnight
authors.forename: H J
authors.initials: HJ
authors.lastname: Price
authors.forename: D M
authors.initials: DM
authors.lastname: Stelly
mesh_terms: D003368:Gossypium / Q000235:genetics*; D017404:In Situ Hybridization, Fluorescence; D011123:Polyploidy; D018626:Retroelements
chemical_list: D018626:Retroelements