Origin of Wild Polyploid Avena Species Inferred from Polymorphism of the ITS1 rDNA in Their Genomes

In this article, we analyzed the origin of wild polyploid oats (Avena L., Poaceae) using region 18S rDNA (partially)–ITS1–5.8S obtained via NGS. There are six tetraploid (2n = 28) and four hexaploid 42) species differing by specific genome combinations: A. barbata, vaviloviana (AB), agadiriana (AB or BB), magna, murphyi, insularis (AC CD), ludoviciana, sterilis, fatua, occidentalis (ACD). We compared pool marker sequences with those their putative diploid ancestors: atlantica (As-genome), hirtula (As), canariensis (Ac), ventricosa (Cv), clauda (paleopolyploid Cp A-related rDNA). found 15 major ribotypes (more than 1000 reads per pool) in oats. Comparing them, that AB-tetraploid possibly inherited A-genome from (As1-ribotype), whereas B-genome ribotype is can be a derivative family. Our data do not support hypothesis CD-genome set insularis: they have an AC-genome constitution instead. The C-genome-related could been ventricosa. Hexaploids show different pattern tetraploids; main sterilis probably belong to D-group also shared one clauda.