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Plant Systematics and Evolution

, Volume 166, Issue 1–2, pp 69–78 | Cite as

Karyotypic and chloroplast genomic diversity inMedicago sect.Lupularia (Leguminosae)

  • S. E. Schlarbaum
  • R. J. Rose
  • E. Small
  • Lowell B. Johnson
Article
  • 76 Downloads

Abstract

Studies were made on the chromosome complements and chloroplast genomes ofMedicago lupulina andM. secundiflora, which comprise sectionLupularia ofMedicago. Both types of analyses indicated more substantial differences between these species than suggested by external morphology.Medicago lupulina has a relatively asymmetrical karyotype in terms of centromeric position and relative length. The karyotype ofM. secundiflora is comparatively more asymmetrical in centromeric position and reduced in absolute size but exhibits greater symmetry in relative length. The restriction endonuclease fragmentation patterns of the chloropiast DNA of these two species (with Bam HI, Eco RI, Bgl II, and Xho I) show little similarity, with only 17% of the fragments matching in size. The lack of interspecific congruence among data of morphology, karyology and cpDNA inLupularia is contrary to consistency exhibited among these data inMedicago subsect.Intertextae.

Key words

Angiosperms Leguminosae Medicago lupulina M. secundiflora Chromosomes karyotypes chloroplast DNA evolution phylogeny 

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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • S. E. Schlarbaum
    • 1
  • R. J. Rose
    • 2
  • E. Small
    • 3
  • Lowell B. Johnson
    • 4
  1. 1.Department of Forestry, Wildlife and FisheriesThe University of TennesseeKnoxvilleUSA
  2. 2.Department of Biological SciencesThe University of NewcastleAustralia
  3. 3.Biosystematics Research CentreAgriculture CanadaOttawaCanada
  4. 4.Department of Plant Pathology, Throckmorton HallKansas State UniversityManhattanUSA

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