Intraspecific Structure and Reproductive Relationships betweenElymus mutabilisand E. transbaicalensis(Poaceae) in Southern Siberia from the Viewpoint of Taxonomical Genetics

Intraspecific Structure and Reproductive Relationships betweenElymus mutabilisand E.... The relationships between StH-genomic species Elymus mutabilis (Drob.) Tzvel. and E. transbaicalensis (Nevski) Tzvel. were examined using biosystematic and biochemical (SDS electrophoresis of endosperm proteins) methods. The results showed the following. (1) There is interspecific morphological discreteness that permits assigning most individuals from the wild to a definite species. However, self-fertile intermediate individuals of introgressive origin were found. (2) Both taxa exhibited marked specificity of electrophoretic characteristics of endosperm proteins. (3) The species form two separate recombination gene pools (RGPs). Thus, E. mutabilisand E. transbaicalensis should be regarded as two distinct species. Nevertheless, there is some genetic exchange and unidirectional gene flow between the RGPs, especially in secondary (successive) habitats where mixed populations are observed. Two RGPs form the single introgressive gene pool (IGP), which includes other StH-genomic species of Northern Eurasia. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Intraspecific Structure and Reproductive Relationships betweenElymus mutabilisand E. transbaicalensis(Poaceae) in Southern Siberia from the Viewpoint of Taxonomical Genetics

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2004 by MAIK “Nauka/Interperiodica”
Subject
Biomedicine; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1023/B:RUGE.0000048665.40740.2c
Publisher site
See Article on Publisher Site

Abstract

The relationships between StH-genomic species Elymus mutabilis (Drob.) Tzvel. and E. transbaicalensis (Nevski) Tzvel. were examined using biosystematic and biochemical (SDS electrophoresis of endosperm proteins) methods. The results showed the following. (1) There is interspecific morphological discreteness that permits assigning most individuals from the wild to a definite species. However, self-fertile intermediate individuals of introgressive origin were found. (2) Both taxa exhibited marked specificity of electrophoretic characteristics of endosperm proteins. (3) The species form two separate recombination gene pools (RGPs). Thus, E. mutabilisand E. transbaicalensis should be regarded as two distinct species. Nevertheless, there is some genetic exchange and unidirectional gene flow between the RGPs, especially in secondary (successive) habitats where mixed populations are observed. Two RGPs form the single introgressive gene pool (IGP), which includes other StH-genomic species of Northern Eurasia.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Dec 14, 2004

References

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