@ARTICLE{TreeBASE2Ref19750,
author = {Hanna Weiss-Schneeweiss and Cordula Bl?ch and Barbara Turner and Jose L Villasenor and Tod F. Stuessy and Gerald M. Schneeweiss},
title = {The promiscuous and the chaste: frequent allopolyploid speciation and its genomic consequences in American daisies (Melampodium sect. Melampodium; Asteraceae)},
year = {2011},
keywords = {allopolyploidy, chromosome evolution, fluorescence in situ hybridisation, genome size, phylogeny, rDNA},
doi = {10.1111/j.1558-5646.2011.01424.x},
url = {http://},
pmid = {},
journal = {Evolution},
volume = {},
number = {},
pages = {},
abstract = {Polyploidy, an important factor in eukaryotic evolution, is especially abundant in angiosperms, where it often acts in concert with hybridization to produce allopolyploids. The application of molecular phylogenetic techniques has identified the origins of numerous allopolyploids, but little is known on genomic and chromosomal consequences of allopolyploidization, despite their important role in conferring divergence of allopolyploids from their parental species. Here, using several plastid and nuclear sequence markers, we clarify the origin of tetra- and hexaploids in a group of American daisies, allowing characterization of genome dynamics in polyploids compared to their diploid ancestors. All polyploid species are allopolyploids. Among the four diploid gene pools, the propensity for allopolyploidization is unevenly distributed phylogenetically with a few species apparently more prone to participate, but the underlying causes remain unclear. Polyploid genomes are characterized by differential loss of ribosomal DNA loci (5S and 35S rDNA), known hotspots of chromosomal evolution, but show genome size additivity, suggesting the presence of processes counterbalancing genome reduction. Patterns of ribosomal DNA sequence conversion and provenance of the lost loci are highly idiosyncratic and differ even between allopolyploids of identical parentage, indicating that allopolyploids deriving from the same lower-ploid parental species can follow different evolutionary trajectories.}
}
Citation for Study 11476
Citation title:
"The promiscuous and the chaste: frequent allopolyploid speciation and its genomic consequences in American daisies (Melampodium sect. Melampodium; Asteraceae)".
Study name:
"The promiscuous and the chaste: frequent allopolyploid speciation and its genomic consequences in American daisies (Melampodium sect. Melampodium; Asteraceae)".
This study is part of submission 11466
(Status: Published).
Citation
Weiss-schneeweiss H., Bl?ch C., Turner B., Villasenor J.L., Stuessy T., & Schneeweiss G. 2011. The promiscuous and the chaste: frequent allopolyploid speciation and its genomic consequences in American daisies (Melampodium sect. Melampodium; Asteraceae). Evolution, .
Authors
-
Weiss-schneeweiss H.
-
Bl?ch C.
-
Turner B.
-
Villasenor J.L.
-
Stuessy T.
-
Schneeweiss G.
Abstract
Polyploidy, an important factor in eukaryotic evolution, is especially abundant in angiosperms, where it often acts in concert with hybridization to produce allopolyploids. The application of molecular phylogenetic techniques has identified the origins of numerous allopolyploids, but little is known on genomic and chromosomal consequences of allopolyploidization, despite their important role in conferring divergence of allopolyploids from their parental species. Here, using several plastid and nuclear sequence markers, we clarify the origin of tetra- and hexaploids in a group of American daisies, allowing characterization of genome dynamics in polyploids compared to their diploid ancestors. All polyploid species are allopolyploids. Among the four diploid gene pools, the propensity for allopolyploidization is unevenly distributed phylogenetically with a few species apparently more prone to participate, but the underlying causes remain unclear. Polyploid genomes are characterized by differential loss of ribosomal DNA loci (5S and 35S rDNA), known hotspots of chromosomal evolution, but show genome size additivity, suggesting the presence of processes counterbalancing genome reduction. Patterns of ribosomal DNA sequence conversion and provenance of the lost loci are highly idiosyncratic and differ even between allopolyploids of identical parentage, indicating that allopolyploids deriving from the same lower-ploid parental species can follow different evolutionary trajectories.
Keywords
allopolyploidy, chromosome evolution, fluorescence in situ hybridisation, genome size, phylogeny, rDNA
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S11476
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref19750,
author = {Hanna Weiss-Schneeweiss and Cordula Bl?ch and Barbara Turner and Jose L Villasenor and Tod F. Stuessy and Gerald M. Schneeweiss},
title = {The promiscuous and the chaste: frequent allopolyploid speciation and its genomic consequences in American daisies (Melampodium sect. Melampodium; Asteraceae)},
year = {2011},
keywords = {allopolyploidy, chromosome evolution, fluorescence in situ hybridisation, genome size, phylogeny, rDNA},
doi = {10.1111/j.1558-5646.2011.01424.x},
url = {http://},
pmid = {},
journal = {Evolution},
volume = {},
number = {},
pages = {},
abstract = {Polyploidy, an important factor in eukaryotic evolution, is especially abundant in angiosperms, where it often acts in concert with hybridization to produce allopolyploids. The application of molecular phylogenetic techniques has identified the origins of numerous allopolyploids, but little is known on genomic and chromosomal consequences of allopolyploidization, despite their important role in conferring divergence of allopolyploids from their parental species. Here, using several plastid and nuclear sequence markers, we clarify the origin of tetra- and hexaploids in a group of American daisies, allowing characterization of genome dynamics in polyploids compared to their diploid ancestors. All polyploid species are allopolyploids. Among the four diploid gene pools, the propensity for allopolyploidization is unevenly distributed phylogenetically with a few species apparently more prone to participate, but the underlying causes remain unclear. Polyploid genomes are characterized by differential loss of ribosomal DNA loci (5S and 35S rDNA), known hotspots of chromosomal evolution, but show genome size additivity, suggesting the presence of processes counterbalancing genome reduction. Patterns of ribosomal DNA sequence conversion and provenance of the lost loci are highly idiosyncratic and differ even between allopolyploids of identical parentage, indicating that allopolyploids deriving from the same lower-ploid parental species can follow different evolutionary trajectories.}
}
- Show RIS reference
TY - JOUR
ID - 19750
AU - Weiss-Schneeweiss,Hanna
AU - Bl?ch,Cordula
AU - Turner,Barbara
AU - Villasenor,Jose L
AU - Stuessy,Tod F.
AU - Schneeweiss,Gerald M.
T1 - The promiscuous and the chaste: frequent allopolyploid speciation and its genomic consequences in American daisies (Melampodium sect. Melampodium; Asteraceae)
PY - 2011
KW - allopolyploidy
KW - chromosome evolution
KW - fluorescence in situ hybridisation
KW - genome size
KW - phylogeny
KW - rDNA
UR - http://dx.doi.org/10.1111/j.1558-5646.2011.01424.x
N2 - Polyploidy, an important factor in eukaryotic evolution, is especially abundant in angiosperms, where it often acts in concert with hybridization to produce allopolyploids. The application of molecular phylogenetic techniques has identified the origins of numerous allopolyploids, but little is known on genomic and chromosomal consequences of allopolyploidization, despite their important role in conferring divergence of allopolyploids from their parental species. Here, using several plastid and nuclear sequence markers, we clarify the origin of tetra- and hexaploids in a group of American daisies, allowing characterization of genome dynamics in polyploids compared to their diploid ancestors. All polyploid species are allopolyploids. Among the four diploid gene pools, the propensity for allopolyploidization is unevenly distributed phylogenetically with a few species apparently more prone to participate, but the underlying causes remain unclear. Polyploid genomes are characterized by differential loss of ribosomal DNA loci (5S and 35S rDNA), known hotspots of chromosomal evolution, but show genome size additivity, suggesting the presence of processes counterbalancing genome reduction. Patterns of ribosomal DNA sequence conversion and provenance of the lost loci are highly idiosyncratic and differ even between allopolyploids of identical parentage, indicating that allopolyploids deriving from the same lower-ploid parental species can follow different evolutionary trajectories.
L3 - 10.1111/j.1558-5646.2011.01424.x
JF - Evolution
VL -
IS -
ER -