Phylogenetic relationships among Triticum L. and Aegilops L. species as genome progenitors of bread wheat based on sequence diversity in trnT-F region of chloroplast DNA |
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Authors: | Ayten Dizkirici Cigdem Kansu Sertac Onde Melahat Birsin Murat Özgen Zeki Kaya |
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Institution: | 1. Department of Biological Sciences, Middle East Technical University, 06531, Ankara, Turkey 3. Department of Biology, Yuzuncu Yil University, 65080, Van, Turkey 2. Department of Field Crops, Faculty of Agriculture, Ankara University, 06100, Ankara, Turkey
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Abstract: | Cultivated wheat, (Triticum aestivum L.), is one of the most important food crops in the world. The Aegilops L. genus is frequently utilized by plant breeders for improving the current wheat cultivars due to their close relationships. Therefore, understanding the phylogenetic relationships among the species of these genera is not only valuable for plant taxonomy, but also for plant breeding efforts. The presented phylogenetic analysis was based on the sequences of trnT-F chloroplast DNA containing three non-coding sub-regions. Twelve genotypes belonging to four species of Triticum L. genus and twenty-four genotypes belonging to eight species of Aegilops genus were used in the current study. The results postulated a close genetic relationship between diploid Aegilops species containing the BB genome and polyploid Triticum species. With the exception of Aegilops cylindrica Host (CCDD), all other Aegilops species having the CC genome were alienated from Aegilops speltoides Tausch (BB) and clustered together. These two clusters joined by a third cluster including the AA genome containing diploid Triticum species. |
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