- THIS ARTICLE
- Full Text
- Full Text (PDF)
-
All Versions of this Article:
genetics.105.053538v1
172/4/2481 most recent - Alert me when this article is cited
- Alert me if a correction is posted
- SERVICES
- Email this article to a friend
- Similar articles in this journal
- Similar articles in PubMed
- Alert me to new issues of the journal
- Download to citation manager
- Reprints & Permissions
- CITING ARTICLES
- Citing Articles via HighWire
- Citing Articles via Google Scholar
- GOOGLE SCHOLAR
- Articles by Martin, N. H.
- Articles by Arnold, M. L.
- Search for Related Content
- PUBMED
- PubMed Citation
- Articles by Martin, N. H.
- Articles by Arnold, M. L.
Originally published as Genetics Published Articles Ahead of Print on January 16, 2006.
Genetics, Vol. 172, 2481-2489, April 2006, Copyright © 2006
doi:10.1534/genetics.105.053538
Detecting Adaptive Trait Introgression Between Iris fulva and I. brevicaulis in Highly Selective Field Conditions
Noland H. Martin*,1,
Amy C. Bouck
and
Michael L. Arnold*
* Department of Genetics, University of Georgia, Athens, Georgia 30602 and Department of Biology, Duke University, Durham, North Carolina 27708
1 Corresponding author: Department of Genetics, Life Sciences Bldg., University of Georgia, Athens, GA 30602.
E-mail: nhmartin{at}uga.edu
The idea that natural hybridization has served as an important force in evolutionary and adaptive diversification has gained considerable momentum in recent years. By combining genome analyses with a highly selective field experiment, we provide evidence for adaptive trait introgression between two naturally hybridizing Louisiana Iris species, flood-tolerant Iris fulva and dry-adapted I. brevicaulis. We planted reciprocal backcross (BC1) hybrids along with pure-species plants into natural settings that, due to a flooding event, favored I. fulva. As expected, I. fulva plants survived at much higher rates than I. brevicaulis plants. Backcross hybrids toward I. fulva (BCIF) also survived at significantly higher rates than the reciprocal backcross toward I. brevicaulis (BCIB). Survivorship of BCIB hybrids was strongly influenced by the presence of a number of introgressed I. fulva alleles located throughout the genome, while survivorship in the reciprocal BCIF hybrids was heavily influenced by two epistatically acting QTL of opposite effects. These results demonstrate the potential for adaptive trait introgression between these two species and may help to explain patterns of genetic variation observed in naturally occurring hybrid zones.
This article has been cited by other articles:
 |
|
 |
|
  C. Lexer and A. Widmer The genic view of plant speciation: recent progress and emerging questions Phil Trans R Soc B, September 27, 2008; 363(1506): 3023 - 3036. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. L Arnold, Y. Sapir, and N. H Martin Genetic exchange and the origin of adaptations: prokaryotes to primates Phil Trans R Soc B, September 12, 2008; 363(1505): 2813 - 2820. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 N. H. Martin, A. C. Bouck, and M. L. Arnold The Genetic Architecture of Reproductive Isolation in Louisiana Irises: Flowering Phenology Genetics, April 1, 2007; 175(4): 1803 - 1812. [Abstract] [Full Text] [PDF]
|
|