@ARTICLE{TreeBASE2Ref20691,
author = {James I. Cohen},
title = {Continuous characters in phylogenetic analyses: Patterns of corolla tube length evolution in Lithospermum L. (Boraginaceae)},
year = {2012},
keywords = {ancestral character state reconstruction, Boraginaceae, continuous character, corolla evolution, Lithospermum, molecular dating},
doi = {},
url = {http://},
pmid = {},
journal = {Biological Journal of the Linnean Society},
volume = {},
number = {},
pages = {},
abstract = {The present study is an investigation of six different scoring schemes and eight different types of analytic methods to investigate the evolution of a continuous character ? corolla tube length ? in Lithospermum L. (Boraginaceae). Corolla tube length in the genus is quite variable, ranging from 1 mm to 75 mm, and the length of the corolla tube has implications for pollination biology, such as longer corolla tubes (>25 mm in length) being pollinated by hummingbirds or moths. In general, the various methods resolve similar ancestral character states; however, different states are reconstructed at nodes in which the descendants greatly differ in corolla tube length. Additionally, it is suggested that all of the variation of a continuous character should be included in analyses, and this may necessitate multiple analyses with different partitions of the data. The various analyses provide evidence that two Maximum Parsimony methods, linear parsimony and the TNT method, minimize the number of different rates of evolution. In Lithospermum, six origins of corolla tubes greater than 20 mm in length are resolved, and these origins occurred at two different times periods: 1) in the shadow of hummingbird diversification in North America (ca. 6-8 Myr) and 2) more recently (ca. 1-1.5 Myr). Four substantial decreases in corolla tube length also are reconstructed, and these may be associated with the origin of self-pollination.}
}
Citation for Study 12700
Citation title:
"Continuous characters in phylogenetic analyses: Patterns of corolla tube length evolution in Lithospermum L. (Boraginaceae)".
Study name:
"Continuous characters in phylogenetic analyses: Patterns of corolla tube length evolution in Lithospermum L. (Boraginaceae)".
This study is part of submission 12700
(Status: Published).
Citation
Cohen J.I. 2012. Continuous characters in phylogenetic analyses: Patterns of corolla tube length evolution in Lithospermum L. (Boraginaceae). Biological Journal of the Linnean Society, .
Authors
-
Cohen J.I.
(submitter)
(956) 326-2411
Abstract
The present study is an investigation of six different scoring schemes and eight different types of analytic methods to investigate the evolution of a continuous character ? corolla tube length ? in Lithospermum L. (Boraginaceae). Corolla tube length in the genus is quite variable, ranging from 1 mm to 75 mm, and the length of the corolla tube has implications for pollination biology, such as longer corolla tubes (>25 mm in length) being pollinated by hummingbirds or moths. In general, the various methods resolve similar ancestral character states; however, different states are reconstructed at nodes in which the descendants greatly differ in corolla tube length. Additionally, it is suggested that all of the variation of a continuous character should be included in analyses, and this may necessitate multiple analyses with different partitions of the data. The various analyses provide evidence that two Maximum Parsimony methods, linear parsimony and the TNT method, minimize the number of different rates of evolution. In Lithospermum, six origins of corolla tubes greater than 20 mm in length are resolved, and these origins occurred at two different times periods: 1) in the shadow of hummingbird diversification in North America (ca. 6-8 Myr) and 2) more recently (ca. 1-1.5 Myr). Four substantial decreases in corolla tube length also are reconstructed, and these may be associated with the origin of self-pollination.
Keywords
ancestral character state reconstruction, Boraginaceae, continuous character, corolla evolution, Lithospermum, molecular dating
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S12700
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref20691,
author = {James I. Cohen},
title = {Continuous characters in phylogenetic analyses: Patterns of corolla tube length evolution in Lithospermum L. (Boraginaceae)},
year = {2012},
keywords = {ancestral character state reconstruction, Boraginaceae, continuous character, corolla evolution, Lithospermum, molecular dating},
doi = {},
url = {http://},
pmid = {},
journal = {Biological Journal of the Linnean Society},
volume = {},
number = {},
pages = {},
abstract = {The present study is an investigation of six different scoring schemes and eight different types of analytic methods to investigate the evolution of a continuous character ? corolla tube length ? in Lithospermum L. (Boraginaceae). Corolla tube length in the genus is quite variable, ranging from 1 mm to 75 mm, and the length of the corolla tube has implications for pollination biology, such as longer corolla tubes (>25 mm in length) being pollinated by hummingbirds or moths. In general, the various methods resolve similar ancestral character states; however, different states are reconstructed at nodes in which the descendants greatly differ in corolla tube length. Additionally, it is suggested that all of the variation of a continuous character should be included in analyses, and this may necessitate multiple analyses with different partitions of the data. The various analyses provide evidence that two Maximum Parsimony methods, linear parsimony and the TNT method, minimize the number of different rates of evolution. In Lithospermum, six origins of corolla tubes greater than 20 mm in length are resolved, and these origins occurred at two different times periods: 1) in the shadow of hummingbird diversification in North America (ca. 6-8 Myr) and 2) more recently (ca. 1-1.5 Myr). Four substantial decreases in corolla tube length also are reconstructed, and these may be associated with the origin of self-pollination.}
}
- Show RIS reference
TY - JOUR
ID - 20691
AU - Cohen,James I.
T1 - Continuous characters in phylogenetic analyses: Patterns of corolla tube length evolution in Lithospermum L. (Boraginaceae)
PY - 2012
KW - ancestral character state reconstruction
KW - Boraginaceae
KW - continuous character
KW - corolla evolution
KW - Lithospermum
KW - molecular dating
UR - http://dx.doi.org/
N2 - The present study is an investigation of six different scoring schemes and eight different types of analytic methods to investigate the evolution of a continuous character ? corolla tube length ? in Lithospermum L. (Boraginaceae). Corolla tube length in the genus is quite variable, ranging from 1 mm to 75 mm, and the length of the corolla tube has implications for pollination biology, such as longer corolla tubes (>25 mm in length) being pollinated by hummingbirds or moths. In general, the various methods resolve similar ancestral character states; however, different states are reconstructed at nodes in which the descendants greatly differ in corolla tube length. Additionally, it is suggested that all of the variation of a continuous character should be included in analyses, and this may necessitate multiple analyses with different partitions of the data. The various analyses provide evidence that two Maximum Parsimony methods, linear parsimony and the TNT method, minimize the number of different rates of evolution. In Lithospermum, six origins of corolla tubes greater than 20 mm in length are resolved, and these origins occurred at two different times periods: 1) in the shadow of hummingbird diversification in North America (ca. 6-8 Myr) and 2) more recently (ca. 1-1.5 Myr). Four substantial decreases in corolla tube length also are reconstructed, and these may be associated with the origin of self-pollination.
L3 -
JF - Biological Journal of the Linnean Society
VL -
IS -
ER -
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