PMID- 21622351
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20121002
LR  - 20110530
IS  - 0002-9122 (Print)
IS  - 0002-9122 (Linking)
VI  - 96
IP  - 9
DP  - 2009 Sep
TI  - The genomic organization of Ty3/gypsy-like retrotransposons in Helianthus 
      (Asteraceae) homoploid hybrid species.
PG  - 1646-55
LID - 10.3732/ajb.0800337 [doi]
AB  - The origin of new diploid, or homoploid, hybrid species is associated with rapid 
      genomic restructuring in the hybrid neospecies. This mode of speciation has been 
      best characterized in wild sunflower species in the genus Helianthus, where three 
      homoploid hybrid species (H. anomalus, H. deserticola, and H. paradoxus) have 
      independently arisen via ancient hybridization events between the same two 
      parental species (H. annuus and H. petiolaris). Most previous work examining 
      genomic restructuring in these sunflower hybrid species has focused on 
      chromosomal rearrangements. However, the origin of all three homoploid hybrid 
      sunflower species also is associated with massive proliferation events of 
      Ty3/gypsy-like retrotransposons in the hybrid species' genomes. We compared the 
      genomic organization of these elements in the parent species and two of the 
      homoploid hybrid species using fluorescence in situ hybridization (FISH). We 
      found a significant expansion of Ty3/gypsy-like retrotransposons confined to the 
      pericentromeric regions of two hybrid sunflower species, H. deserticola and H. 
      paradoxus. In contrast, we detected no significant increase in the frequency or 
      extent of dispersed retrotransposon populations in the hybrid species within the 
      resolution limits of our assay. We discuss the potential role that transposable 
      element proliferation and localization plays in the evolution of homoploid hybrid 
      species.
FAU - Staton, S Evan
AU  - Staton SE
AD  - Miami University, Department of Botany, 316 Pearson Hall, Oxford, Ohio 45056 USA.
FAU - Ungerer, Mark C
AU  - Ungerer MC
FAU - Moore, Richard C
AU  - Moore RC
LA  - eng
PT  - Journal Article
DEP - 20090819
PL  - United States
TA  - Am J Bot
JT  - American journal of botany
JID - 0370467
EDAT- 2009/09/01 00:00
MHDA- 2009/09/01 00:01
CRDT- 2011/05/31 06:00
PHST- 2011/05/31 06:00 [entrez]
PHST- 2009/09/01 00:00 [pubmed]
PHST- 2009/09/01 00:01 [medline]
AID - ajb.0800337 [pii]
AID - 10.3732/ajb.0800337 [doi]
PST - ppublish
SO  - Am J Bot. 2009 Sep;96(9):1646-55. doi: 10.3732/ajb.0800337. Epub 2009 Aug 19.