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