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The phylogenetic position of the genusAstragalus(fabaceae): Evidence from the chloroplast genesrpoC1 andrpoC2

Authors
Journal
Biochemical Systematics and Ecology
0305-1978
Publisher
Elsevier
Publication Date
Volume
22
Issue
4
Identifiers
DOI: 10.1016/0305-1978(94)90028-0
Keywords
  • Astragalus
  • Galegeae
  • Fabaceae
  • Chloroplast-Dna
  • Rpoc1
  • Rpoc2
  • Polymerase Chain Reaction
  • Restriction-Site Mapping
  • Molecular Phylogeny
  • Weighted Parsimony

Abstract

Abstract A molecular phylogeny was inferred from the analysis of mapped restriction site variation in 51 species representing the genus Astragalus and putatively related genera in the legume tribes Galegeae, Millettieae, Trifolieae and Vicieae. The resulting hypothesis of phylogenetic relationships suggests: (1) the majority of Astragalus species share a common ancestor within the Galegeae; (2) the recognition of the segregate genera Astracantha and Biserrula makes Astragalus paraphyletic; (3) aneupoloidy and the annual habit have been derived on multiple occasions within the genus Astragalus; and (4) Astragalus as currently circumscribed is polyphyletic since the species A. complanatus, A. cysticalyx, A. sinicus and A. vogelii share a common ancestor with members of the subtribe Coluteinae.

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