Using a combination of degenerate primers designed from the NBS domains of the resistance genes, amplification and subsequent cloning of the resistance gene fragments from sunflower (Helianthus agrophyllus) was conducted. Sequences of cloned PCR products differed from one another and displayed homology to NBS domain fragments of the already known plant resistance genes, as well as to the analogous genes from different classes. The highest homology was shown to the NBS domain regions of cultivated sunflower and the other members of the family Compositae. Two cloned fragments had open reading frames, while the other sequences carried stop codons and seemed to belong to pseudogenes. Amino acid sequences of Helianthus agrophyllus analyzed contained conservative regions typical of NBS domains of the resistance gene products.
Russian Journal of Genetics – Springer Journals
Published: Apr 20, 2007
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