Speciation in Virgilia (Fabaceae): Allopatric divergence followed by introgression?

Michelle Van Der Bank; F. H. Van Der Bank; B. E. Van Wyk

doi:10.1007/BF00989051

Speciation in Virgilia (Fabaceae): Allopatric divergence followed by introgression?

Michelle Van Der Bank, F. H. Van Der Bank, B. E. Van Wyk

Botany and Plant Biotechnology

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Levels of variation revealed by starch gel-electrophoresis were compared with morphological and chemical variation within and among the species and subspecies of Virgilia: V. oroboides subsp. oroboides, V. oroboides subsp. ferruginea and V. divaricata. The data sets exhibited concordance in that all point to a very close relationship between the taxa. Differences are mostly quantitative and an overlapping east-west gradient of character variation is indicated. Analysis of morphological and chemical characters showed that V. oroboides subsp. ferruginea and V. divaricata are relatively distinct, whereas allozyme analysis indicated a high degree of genetic similarity among populations of these two taxa. The observed pattern of variation suggests relatively recent speciation with subsequent introgressive hybridisation resulting in a geographical and ecological gradient.

Original language	English
Pages (from-to)	57-73
Number of pages	17
Journal	Plant Systematics and Evolution
Volume	201
Issue number	1-4
DOIs	https://doi.org/10.1007/BF00989051
Publication status	Published - 1996

Keywords

Biochemical genetics, electrophoresis, genetic distance, speciation
Fabaceae, Podalyrieae, Virgilia

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Plant Science

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10.1007/BF00989051

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title = "Speciation in Virgilia (Fabaceae): Allopatric divergence followed by introgression?",

abstract = "Levels of variation revealed by starch gel-electrophoresis were compared with morphological and chemical variation within and among the species and subspecies of Virgilia: V. oroboides subsp. oroboides, V. oroboides subsp. ferruginea and V. divaricata. The data sets exhibited concordance in that all point to a very close relationship between the taxa. Differences are mostly quantitative and an overlapping east-west gradient of character variation is indicated. Analysis of morphological and chemical characters showed that V. oroboides subsp. ferruginea and V. divaricata are relatively distinct, whereas allozyme analysis indicated a high degree of genetic similarity among populations of these two taxa. The observed pattern of variation suggests relatively recent speciation with subsequent introgressive hybridisation resulting in a geographical and ecological gradient.",

keywords = "Biochemical genetics, electrophoresis, genetic distance, speciation, Fabaceae, Podalyrieae, Virgilia",

author = "{Van Der Bank}, Michelle and {Van Der Bank}, {F. H.} and {Van Wyk}, {B. E.}",

year = "1996",

doi = "10.1007/BF00989051",

language = "English",

volume = "201",

pages = "57--73",

journal = "Plant Systematics and Evolution",

issn = "0378-2697",

publisher = "Springer-Verlag Wien",

number = "1-4",

}

TY - JOUR

T1 - Speciation in Virgilia (Fabaceae)

T2 - Allopatric divergence followed by introgression?

AU - Van Der Bank, Michelle

AU - Van Der Bank, F. H.

AU - Van Wyk, B. E.

PY - 1996

Y1 - 1996

N2 - Levels of variation revealed by starch gel-electrophoresis were compared with morphological and chemical variation within and among the species and subspecies of Virgilia: V. oroboides subsp. oroboides, V. oroboides subsp. ferruginea and V. divaricata. The data sets exhibited concordance in that all point to a very close relationship between the taxa. Differences are mostly quantitative and an overlapping east-west gradient of character variation is indicated. Analysis of morphological and chemical characters showed that V. oroboides subsp. ferruginea and V. divaricata are relatively distinct, whereas allozyme analysis indicated a high degree of genetic similarity among populations of these two taxa. The observed pattern of variation suggests relatively recent speciation with subsequent introgressive hybridisation resulting in a geographical and ecological gradient.

AB - Levels of variation revealed by starch gel-electrophoresis were compared with morphological and chemical variation within and among the species and subspecies of Virgilia: V. oroboides subsp. oroboides, V. oroboides subsp. ferruginea and V. divaricata. The data sets exhibited concordance in that all point to a very close relationship between the taxa. Differences are mostly quantitative and an overlapping east-west gradient of character variation is indicated. Analysis of morphological and chemical characters showed that V. oroboides subsp. ferruginea and V. divaricata are relatively distinct, whereas allozyme analysis indicated a high degree of genetic similarity among populations of these two taxa. The observed pattern of variation suggests relatively recent speciation with subsequent introgressive hybridisation resulting in a geographical and ecological gradient.

KW - Biochemical genetics, electrophoresis, genetic distance, speciation

KW - Fabaceae, Podalyrieae, Virgilia

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U2 - 10.1007/BF00989051

DO - 10.1007/BF00989051

M3 - Article

AN - SCOPUS:0029841687

SN - 0378-2697

VL - 201

SP - 57

EP - 73

JO - Plant Systematics and Evolution

JF - Plant Systematics and Evolution

IS - 1-4

ER -

Speciation in Virgilia (Fabaceae): Allopatric divergence followed by introgression?

Abstract

Keywords

ASJC Scopus subject areas

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