Genome Analysis and Meiotic Behaviour of New Tetraploid Secalotricum Forms

Abstract

Three new tetraploid secalotricum forms with genomes of Triticum and S. cereale were studied. Using differential staining of the chromosomes it was established that pairs of 1B, 2B, 3B, 4A, 5A, 6A, 7B wheat and 14 rye chromosomes were observed. In diakinesis were counted 14 closed ring bivalents. The study with Giemsa C-banding in metaphase I showed that the rod bivalents and the univalents belong to the rye genome. Those with 2 telomeric heterochromatin blocks were prevailent. The tetraploid secalotricums were characterized by a considerable cytological stability, as only 15.10 to 17.68% of the tetrads had micronuclei.