Species relationships and genetic variation in the di ploid wheats triticum aegilops as revealed by starch gel electrophoresis

Brody, T.; Mendlinger, S.

Plant Systematics and Evolution 136(3-4): 247-258

1980


ISSN/ISBN: 0378-2697
DOI: 10.1007/bf01004629
Accession: 006454964

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Abstract
Twenty enzyme loci were examined in the diploid species of Triticum and Aegilops for allelic variation by starch gel electrophoresis. Section Sitopsis, including the 5 spp. A. speltoides, A. longissima, A. sharonensis, A. bicornis and A. searsii form a close subgroup with A. speltoides slightly removed from the others, T. monococcum s.l., was closest to the species of the Sitopsis group. A. comosa, A. umbellulata and A. uniaristata form a 2nd subgroup with A. caudata most closely related to these species. A. squarrosa was almost equally related to all of the species, showing no special affinity for any one species group. Altogether, 19 of 20 loci examined were polymorphic with a mean of 6.7 alleles/locus. Species were characterized by the presence of predominant alleles. A conspicious genetic characteristic of Triticum-Aegilops is the sharing of these predominant alleles between species. Within species variation is characterized by a diffuse distribution of secondary alleles.

Species relationships and genetic variation in the di ploid wheats triticum aegilops as revealed by starch gel electrophoresis