Karyotype Analysis inTriticum: III — Analysis of the Presumed Diploid Progenitors of Polyploid Wheats

SUMMARYKaryotypes of some diploid Triticum and Aegilops strains related to polyploid wheats: T. boeoticum and T. urarlu (genome A), Ae. speltoides var. ligustica (genome S), Ae. mutica genome Mt), Ae. bicornis (genome Sb) and Ae. squarrosa (genome D) have been analyzed.Karyotypes of two strains of diploid Triticum analyzed seem to be very similar thus confirming their belonging to the same species. Rather slight differences were found among karyotypes of Ae. speltoides and Ae. mutica, both being quite different from karyotypes presented by Ae. bicornis and Ae. squarrosa. Results obtained seem to ascertain — on a chromosome morphology basis — a higher affinity of Ae. speltoides with Ae. mutica than with Ae. bicornis. Relationships between chromosome morphology of diploid species and Triticum polyploids are rather clear when Ae. squarrosa is considered, while no evident affinities are shown with T. boeoticum and Ae. speltoides (or Ae. bicornis and Ae. mutica).