[Genetic Polymorphism of Durum Wheat (Triticum durum Desf.) Accessions of Azerbaijan].

The genetic diversity of 110 durum wheat genotypes of Azerbaijan was evaluated by ISSR markers. A total of 107 fragments were determined, ranging from 9 to 18 per locus. ISSR primers have revealed a high level of polymorphism (average 82%) among different durum wheat varieties and botanical varieties. The ISSR markers used in the study were quite informative and made it possible to distinguish all durum wheat accessions from each other. Cluster analysis based on ISSR data classified the accessions into 11 major groups. No linkage was observed between the collection site and genetic structure of the samples. On the other hand, a few accessions were detected as unique genotypes and tended to form separate clusters. The estimated gene diversity value was high, both within the whole collection and within the different groups of botanical varieties.

Alterations in the genome of wheat seedlings grown under drought stress and the effect of gibberellic acid on these alterations.

The changes in the amount of nuclear, chloroplast and mithocondrial nucleic acids of wheat (Triticum aestivum L.) seedlings in relation with drought stress and the effect of gibberellic acid (GA3) on these changes were investigated by spectrophotometric method. It was found that drought stress caused decrease in the amount of nucleic acids. In the seedlings to which GA3 was applied following drought stress, increase in the amount of nuclear nucleic acids (especially in the amount of labile DNA, which is the active portion) was determined. Similar results were observed in the amount of nucleic acids of mitochondria and chloroplasts. All these results show that drought stress caused quantitative changes in the genetic substrate of wheat seedling cells and GA3 application alleviated this effect by activating the synthesis of nucleic acids.