Abstract
In the present study, our intention was to elucidate the genetic relation of M. acuminata subspecies and analyse the diversity of the M. balbisiana gene-pool using nuclear ribosomal gene loci based marker system. Additionally the obtained information allowed elucidating the structure and ancestry of the nuclear genomes of diploid and triploid cultivars. By establishing the nucleotide sequence of the rDNA locus for M. acuminata and partially for M. balbisiana and their comparative analysis revealed that the 5′ETS region was the most divergent between acuminata and balbisiana genomes. Based on the SNP sites identified in this region a PCR based system was built, which revealed four gene-pools among M. acuminata wild types, while M. balbisiana showed no sequence divergence. The developed markers proved to be a powerful tool in the identification of the acuminata component of diploid and triploid hybrid cultivars and discovery of unexpected genotypes.
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