|
چکیده
|
We assessed the molecular genetic diversity and relationships among some Aegilopsand Triticumspecies using 15 start codon-targeted (SCoT) polymorphism markers. A total of 166 bands amplified, of which 164 (98.79%) were polymorphic. Analysis of molecular variance and inter-population differentiation (Gst) indicated high genetic variation within the studied populations. Our analyses revealed high genetic diversity in T. boeoticum, Ae. cylindrica, T. durumand Ae. umbellulata, low diversity in Ae. crassa, Ae. caudataand Ae. speltoides, and a close relationship among Ae. tauschii, T. aestivum, T. durum, T. urartu, and T. boeoticum. Cluster analysis indicated 180 individuals divided into 8 genome homogeneous clades and 11 sub-groups. T. aestivumand T. durumaccessions were grouped together, and accessions with the C and U genomes were grouped into the same clade. Our results support the hypothesis that T. urartuand Ae. tauschiiare two diploid ancestors of T. aestivum, and also that Ae. caudataand Ae. umbellulataare putative donors of C and U genomes for other Aegilopsspecies that possess these genomes. Our results also revealed that the SCoT technique is informative and can be used to assess genetic relationships among wheat germplasm.
|