Study of karyotypic relationships of D, S and U genomes of Aegilops with A genome of Triticum

The relationships between D, S, U and A genomes were investigated using 30 populations from 6 diploid species of Triticum and Aegilops based on karyological characters. Karyotype was prepared for 5 metaphases cells and the karyotypic traits were calculated in each population. The studying genotypes had a symmetric karyotype. The karyotypic traits showed variation between species clearly. Intraspecific diversity of each species were observed between populations. The species were separated based on cluster analysis, but Triticum species dont completely separation from Aegilops species and Ae. umbellulata had the more distance with other Aegilops species, also, Triticum species were separated in closer distance with Ae. Speltoides based on cluster analysis graph. Principal components analysis showed that interspesific variation was further based on intrachromosomal asymmetry and chromatin value which Ae. umbellulata had the most intrachromosomal asymmetry and the lowest chromatin value. On the other hand, Ae. speltoides, T. urartu and T. boeticum had the lowest intrachromosomal asymmetry and the most chromatin value. The total length of chromosomes and interchromosomal asymmetry was causes of intraspecific diversity. In addition, the U genome had the most distance with A genome, the S genome had the most similarity with A genome and the D genome had a moderate similarity with A genome.