@ARTICLE{TreeBASE2Ref21348,
author = {James Beck and James R. Allison and Kathleen Pryer and Michael D. Windham},
title = {Identifying multiple origins of polyploid taxa: a multilocus study of the hybrid cloak fern (Astrolepis integerrima; Pteridaceae)},
year = {2012},
keywords = {AFLP; Astrolepis integerrima; hybridization; multiple origins; PCO-MC; polyploidy; trnG-trnR intergenic spacer},
doi = {},
url = {http://},
pmid = {},
journal = {American Journal of Botany},
volume = {},
number = {},
pages = {},
abstract = {*Premise of the study: Molecular studies have shown that multiple origins of polyploid
taxa are the rule rather than the exception. In order to understand the distribution and
ecology of polyploid species and the evolutionary significance of polyploidy in general,
it is important to delineate these independently-derived lineages as accurately as
possible. Although gene flow among polyploid lineages and backcrossing to their
diploid parents often confound this process, such post-origin gene flow is less of an
issue in asexual polyploids. In this study we estimate the number of independent
origins of the apomictic allopolyploid fern Astrolepis integerrima (Pteridaceae), a
morphologically heterogeneous species most common in the southwestern US and
Mexico, with outlying populations in the southeastern U.S. and Caribbean.
*Methods: Plastid DNA sequence and AFLP data were obtained from 33 A. integerrima
individuals. Phylogenetic analysis of the sequence data and multidimensional
clustering of the AFLP data were used to identify independently-derived lineages.
*Key results: Analysis of the two datasets identified ten genetic groups within the 33
analyzed samples. These groups suggest a minimum of ten origins of A. integerrima in
the northern portion of its range, with both putative parents functioning as maternal
donors, both supplying unreduced gametes, and both contributing a significant portion
of their genetic diversity to the hybrids.
*Conclusions: Our results highlight the extreme cryptic genetic diversity and systematic
complexity that can underlie a single polyploid taxon.}
}
Taxa for Study 13385
Citation title:
"Identifying multiple origins of polyploid taxa: a multilocus study of the hybrid cloak fern (Astrolepis integerrima; Pteridaceae)".
Study name:
"Identifying multiple origins of polyploid taxa: a multilocus study of the hybrid cloak fern (Astrolepis integerrima; Pteridaceae)".
This study is part of submission 13385
(Status: Published).
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