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Corpus Systématique Animale

Titre du document

Closely related Allium species ( Alliaceae ) share a very similar satellite sequence

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Springer (journals)
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Mots-clés d'auteur
  • Alliaceae
  • Allium
  • Satellite DNA
  • fluorescent in situ hybridization
  • sequence homology
  • phylogeny
Nom du fichier dans la ressource
  • U. Pich 1
  • R. Fritsch 1
  • I. Schubert 1
  • 1) Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstraße 3, D-06466, Gatersleben, Federal Republic of Germany

A satellite sequence repeat ofAllium cepa was tested by fluorescent in situ hybridization (FISH) for cross-hybridization to chromosomes of 27 species (in 37 accessions) belonging to 14 sections of four subgenera ofAllium. All investigated species of sect.Cepa, with the two subsects.Cepa andPhyllodolon, revealed clear satellite-specific hybridization signals mainly at their chromosome termini. The tested species belonging to other sections/subgenera revealed no hybridization signals. An exception wasA. roylei, assigned to sect.Oreiprason. Its chromosomes also showed strong terminal hybridization signals. This and other features suggest a close relationship ofA. roylei to the species of sect.Cepa in spite of deviating morphological characters. The divergence between the satellite repeats to species to which theA. cepa repeat cross-hybridized was determined and revealed high degrees of similarity. Therefore, we conclude that this satellite sequence had evolved already in progenitor forms of sect.Cepa and remained unusually well conserved during speciation. This might indicate selection pressure exerted on a secondarily acquired telomere function of the satellite sequence.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - evolutionary biology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - psychologie. psychophysiologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Plant Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - plant sciences
  • 1 - science ; 2 - evolutionary biology
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Plant Systematics and Evolution

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