@ARTICLE{TreeBASE2Ref17040,
author = {Gitte Petersen and Ole Seberg},
title = {On the Origin of the Tetraploid Species Hordeum capense and H. secalinum (Poaceae).},
year = {2004},
keywords = {},
doi = {},
url = {},
pmid = {},
journal = {Systematic Botany},
volume = {},
number = {},
pages = {},
abstract = {The origin of two tetraploid species of Hordeum, H. capense from South Africa and H. secalinum from Eurasia and North Africa, is explored using phylogenetic analyses of two single-copy nuclear genes (DMC1 and EF-G) and one plastid gene (rbcL). By applying copy-specific primers it was possible to obtain sequence data from two copies of each of the nuclear genes from the two tetraploid species. The most parsimonious explanation of the presence of both genes is that each copy was inherited from different diploid parental species. Hence, H. capense and H. secalinum are allotetraploids. The phylogenetic analyses also demonstrated that the two species have a common hybrid origin involving diploid H. marinum subsp. gussoneanum and H. brevisubulatum. A gene tree derived from the plastid rbcL sequences showed that H. brevisubulatum was the maternal parent. Based on the number of evolutionary changes since polyploidization and subsequent diversification of the two species, the isolated occurrence of H. capense in South Africa is best explained as an ancient relic, as opposed to a recent introduction.}
}
Citation for Study 1166
Citation title:
"On the Origin of the Tetraploid Species Hordeum capense and H. secalinum (Poaceae).".
This study was previously identified under the legacy study ID S1073
(Status: Published).
Citation
Petersen G., & Seberg O. 2004. On the Origin of the Tetraploid Species Hordeum capense and H. secalinum (Poaceae). Systematic Botany, null.
Authors
-
Petersen G.
4535322194
-
Seberg O.
+45 3532 2195
Abstract
The origin of two tetraploid species of Hordeum, H. capense from South Africa and H. secalinum from Eurasia and North Africa, is explored using phylogenetic analyses of two single-copy nuclear genes (DMC1 and EF-G) and one plastid gene (rbcL). By applying copy-specific primers it was possible to obtain sequence data from two copies of each of the nuclear genes from the two tetraploid species. The most parsimonious explanation of the presence of both genes is that each copy was inherited from different diploid parental species. Hence, H. capense and H. secalinum are allotetraploids. The phylogenetic analyses also demonstrated that the two species have a common hybrid origin involving diploid H. marinum subsp. gussoneanum and H. brevisubulatum. A gene tree derived from the plastid rbcL sequences showed that H. brevisubulatum was the maternal parent. Based on the number of evolutionary changes since polyploidization and subsequent diversification of the two species, the isolated occurrence of H. capense in South Africa is best explained as an ancient relic, as opposed to a recent introduction.
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S1166
- Other versions:
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref17040,
author = {Gitte Petersen and Ole Seberg},
title = {On the Origin of the Tetraploid Species Hordeum capense and H. secalinum (Poaceae).},
year = {2004},
keywords = {},
doi = {},
url = {},
pmid = {},
journal = {Systematic Botany},
volume = {},
number = {},
pages = {},
abstract = {The origin of two tetraploid species of Hordeum, H. capense from South Africa and H. secalinum from Eurasia and North Africa, is explored using phylogenetic analyses of two single-copy nuclear genes (DMC1 and EF-G) and one plastid gene (rbcL). By applying copy-specific primers it was possible to obtain sequence data from two copies of each of the nuclear genes from the two tetraploid species. The most parsimonious explanation of the presence of both genes is that each copy was inherited from different diploid parental species. Hence, H. capense and H. secalinum are allotetraploids. The phylogenetic analyses also demonstrated that the two species have a common hybrid origin involving diploid H. marinum subsp. gussoneanum and H. brevisubulatum. A gene tree derived from the plastid rbcL sequences showed that H. brevisubulatum was the maternal parent. Based on the number of evolutionary changes since polyploidization and subsequent diversification of the two species, the isolated occurrence of H. capense in South Africa is best explained as an ancient relic, as opposed to a recent introduction.}
}
- Show RIS reference
TY - JOUR
ID - 17040
AU - Petersen,Gitte
AU - Seberg,Ole
T1 - On the Origin of the Tetraploid Species Hordeum capense and H. secalinum (Poaceae).
PY - 2004
KW -
UR -
N2 - The origin of two tetraploid species of Hordeum, H. capense from South Africa and H. secalinum from Eurasia and North Africa, is explored using phylogenetic analyses of two single-copy nuclear genes (DMC1 and EF-G) and one plastid gene (rbcL). By applying copy-specific primers it was possible to obtain sequence data from two copies of each of the nuclear genes from the two tetraploid species. The most parsimonious explanation of the presence of both genes is that each copy was inherited from different diploid parental species. Hence, H. capense and H. secalinum are allotetraploids. The phylogenetic analyses also demonstrated that the two species have a common hybrid origin involving diploid H. marinum subsp. gussoneanum and H. brevisubulatum. A gene tree derived from the plastid rbcL sequences showed that H. brevisubulatum was the maternal parent. Based on the number of evolutionary changes since polyploidization and subsequent diversification of the two species, the isolated occurrence of H. capense in South Africa is best explained as an ancient relic, as opposed to a recent introduction.
L3 -
JF - Systematic Botany
VL -
IS -
ER -
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