Genetic diversity of the D-genome in <Emphasis Type="Italic">T. aestivum</Emphasis> and <Emphasis Type="Italic">Aegilops</Emphasis> species using SSR markers |
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| Authors: | M R Naghavi M J Aghaei A R Taleei M Omidi J Mozafari M E Hassani |
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| Institution: | (1) Agronomy and Plant Breeding Department, Agricultural College, University of Tehran, Karaj, Iran;(2) Seed and Plant Improvement Institute, National Plant Gene Bank of Iran, Mahdasht Road, Karaj, Iran;(3) Horticultural Department, Agricultural College, University of Tehran, Karaj, Iran |
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| Abstract: | Simple sequence repeats (SSRs), highly dispersed nucleotide sequences in genomes, were used for germplasm analysis and estimation
of the genetic relationship of the D-genome among 52 accessions of T. aestivum (AABBDD), Ae. tauschii (DtDt), Ae. cylindrica (CCDcDc) and Ae. crassa (MMDcr1Dcr1), collected from 13 different sites in Iran. A set of 21 microsatellite primers, from various locations on the seven D-genome
chromosomes, revealed a high level of polymorphism. A total of 273 alleles were detected across all four species and the number
of alleles per each microsatellite marker varied from 3 to 27. The highest genetic diversity occurred in Ae. tauschii followed by Ae. crassa, and the genetic distance was the smallest between Ae. tauschii and Ae. cylindrica. Data obtained in this study supports the view that genetic variability in the D-genome of hexaploid wheat is less than in
Ae. tauschii. The highest number of unique alleles was observed within Ae. crassa accessions, indicating this species as a great potential source of novel genes for bread wheat improvement. Knowledge of
genetic diversity in Aegilops species provides different levels of information which is important in the management of germplasm resources. |
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| Keywords: | Aegilops crassa Ae cylindrica Ae tauschii D-genome Genetic diversity SSR T aestivum |
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