@ARTICLE{TreeBASE2Ref18840,
author = {Valerie Lynn Soza and Richard G. Olmstead},
title = {Evolution of breeding systems and fruits in New World Galium and relatives (Rubiaceae)},
year = {2010},
keywords = {breeding systems; Cruciata; fruits; ETS; Galium; phylogeny; rpoB-trnC; trnC-psbM; trnL-ndhJ; Valantia},
doi = {10.3732/ajb.1000130},
url = {http://},
pmid = {},
journal = {American Journal of Botany},
volume = {97},
number = {},
pages = {1630--1646},
abstract = {? Premise of the study: Dioecy occurs in only about 6% of angiosperms, yet it has evolved many times from hermaphroditism. Polygamy is an even more uncommon condition within angiosperms, in which both unisexual and bisexual flowers occur within a species. Polygamy, dioecy, and hermaphroditism all occur within a New World clade of Galium (Rubiaceae), in which dioecy is hypothesized to have evolved from hermaphroditism via polygamy. At least five sections of Galium as traditionally defined by fruit morphology occur within this group. We tested the monophyly of sections defined by fruit morphology and sought to determine origins and pathways of breeding systems within this group.
? Methods: We obtained chloroplast (rpoB-trnC, trnC-psbM, trnL-ndhJ) and nuclear ribosomal (external transcribed spacer) DNA sequences for 89 taxa from the Cruciata-Galium-Valantia (CGV) clade to estimate the phylogeny. Ancestral states for breeding systems, fruit types, and fruit hairs were reconstructed using parsimony and likelihood analyses.
? Key results: We identified nine well-supported lineages of New World Galium taxa. However, none of the sections traditionally defined by fruit morphology are monophyletic. Dioecy is inferred to have arisen at least three times from hermaphroditism; polygamy is inferred to have arisen at least twice from dioecy and at least six times from hermaphroditism.
? Conclusions: Polygamy appears to be a terminal condition in the CGV clade and not a pathway to dioecy. Fruit characters traditionally used in the taxonomy of this group have arisen multiple times within this clade of Galium and are not reliable indicators of shared evolutionary history.}
}
Citation for Study 10364
Citation title:
"Evolution of breeding systems and fruits in New World Galium and relatives (Rubiaceae)".
Study name:
"Evolution of breeding systems and fruits in New World Galium and relatives (Rubiaceae)".
This study is part of submission 10354
(Status: Published).
Citation
Soza V.L., & Olmstead R. 2010. Evolution of breeding systems and fruits in New World Galium and relatives (Rubiaceae). American Journal of Botany, 97: 1630-1646.
Authors
-
Soza V.L.
(submitter)
-
Olmstead R.
Abstract
? Premise of the study: Dioecy occurs in only about 6% of angiosperms, yet it has evolved many times from hermaphroditism. Polygamy is an even more uncommon condition within angiosperms, in which both unisexual and bisexual flowers occur within a species. Polygamy, dioecy, and hermaphroditism all occur within a New World clade of Galium (Rubiaceae), in which dioecy is hypothesized to have evolved from hermaphroditism via polygamy. At least five sections of Galium as traditionally defined by fruit morphology occur within this group. We tested the monophyly of sections defined by fruit morphology and sought to determine origins and pathways of breeding systems within this group.
? Methods: We obtained chloroplast (rpoB-trnC, trnC-psbM, trnL-ndhJ) and nuclear ribosomal (external transcribed spacer) DNA sequences for 89 taxa from the Cruciata-Galium-Valantia (CGV) clade to estimate the phylogeny. Ancestral states for breeding systems, fruit types, and fruit hairs were reconstructed using parsimony and likelihood analyses.
? Key results: We identified nine well-supported lineages of New World Galium taxa. However, none of the sections traditionally defined by fruit morphology are monophyletic. Dioecy is inferred to have arisen at least three times from hermaphroditism; polygamy is inferred to have arisen at least twice from dioecy and at least six times from hermaphroditism.
? Conclusions: Polygamy appears to be a terminal condition in the CGV clade and not a pathway to dioecy. Fruit characters traditionally used in the taxonomy of this group have arisen multiple times within this clade of Galium and are not reliable indicators of shared evolutionary history.
Keywords
breeding systems; Cruciata; fruits; ETS; Galium; phylogeny; rpoB-trnC; trnC-psbM; trnL-ndhJ; Valantia
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S10364
- Other versions:
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref18840,
author = {Valerie Lynn Soza and Richard G. Olmstead},
title = {Evolution of breeding systems and fruits in New World Galium and relatives (Rubiaceae)},
year = {2010},
keywords = {breeding systems; Cruciata; fruits; ETS; Galium; phylogeny; rpoB-trnC; trnC-psbM; trnL-ndhJ; Valantia},
doi = {10.3732/ajb.1000130},
url = {http://},
pmid = {},
journal = {American Journal of Botany},
volume = {97},
number = {},
pages = {1630--1646},
abstract = {? Premise of the study: Dioecy occurs in only about 6% of angiosperms, yet it has evolved many times from hermaphroditism. Polygamy is an even more uncommon condition within angiosperms, in which both unisexual and bisexual flowers occur within a species. Polygamy, dioecy, and hermaphroditism all occur within a New World clade of Galium (Rubiaceae), in which dioecy is hypothesized to have evolved from hermaphroditism via polygamy. At least five sections of Galium as traditionally defined by fruit morphology occur within this group. We tested the monophyly of sections defined by fruit morphology and sought to determine origins and pathways of breeding systems within this group.
? Methods: We obtained chloroplast (rpoB-trnC, trnC-psbM, trnL-ndhJ) and nuclear ribosomal (external transcribed spacer) DNA sequences for 89 taxa from the Cruciata-Galium-Valantia (CGV) clade to estimate the phylogeny. Ancestral states for breeding systems, fruit types, and fruit hairs were reconstructed using parsimony and likelihood analyses.
? Key results: We identified nine well-supported lineages of New World Galium taxa. However, none of the sections traditionally defined by fruit morphology are monophyletic. Dioecy is inferred to have arisen at least three times from hermaphroditism; polygamy is inferred to have arisen at least twice from dioecy and at least six times from hermaphroditism.
? Conclusions: Polygamy appears to be a terminal condition in the CGV clade and not a pathway to dioecy. Fruit characters traditionally used in the taxonomy of this group have arisen multiple times within this clade of Galium and are not reliable indicators of shared evolutionary history.}
}
- Show RIS reference
TY - JOUR
ID - 18840
AU - Soza,Valerie Lynn
AU - Olmstead,Richard G.
T1 - Evolution of breeding systems and fruits in New World Galium and relatives (Rubiaceae)
PY - 2010
KW - breeding systems; Cruciata; fruits; ETS; Galium; phylogeny; rpoB-trnC; trnC-psbM; trnL-ndhJ; Valantia
UR - http://dx.doi.org/10.3732/ajb.1000130
N2 - ? Premise of the study: Dioecy occurs in only about 6% of angiosperms, yet it has evolved many times from hermaphroditism. Polygamy is an even more uncommon condition within angiosperms, in which both unisexual and bisexual flowers occur within a species. Polygamy, dioecy, and hermaphroditism all occur within a New World clade of Galium (Rubiaceae), in which dioecy is hypothesized to have evolved from hermaphroditism via polygamy. At least five sections of Galium as traditionally defined by fruit morphology occur within this group. We tested the monophyly of sections defined by fruit morphology and sought to determine origins and pathways of breeding systems within this group.
? Methods: We obtained chloroplast (rpoB-trnC, trnC-psbM, trnL-ndhJ) and nuclear ribosomal (external transcribed spacer) DNA sequences for 89 taxa from the Cruciata-Galium-Valantia (CGV) clade to estimate the phylogeny. Ancestral states for breeding systems, fruit types, and fruit hairs were reconstructed using parsimony and likelihood analyses.
? Key results: We identified nine well-supported lineages of New World Galium taxa. However, none of the sections traditionally defined by fruit morphology are monophyletic. Dioecy is inferred to have arisen at least three times from hermaphroditism; polygamy is inferred to have arisen at least twice from dioecy and at least six times from hermaphroditism.
? Conclusions: Polygamy appears to be a terminal condition in the CGV clade and not a pathway to dioecy. Fruit characters traditionally used in the taxonomy of this group have arisen multiple times within this clade of Galium and are not reliable indicators of shared evolutionary history.
L3 - 10.3732/ajb.1000130
JF - American Journal of Botany
VL - 97
IS -
SP - 1630
EP - 1646
ER -