Meiotic behavior of two grapevine somatic mutants with ornamental potential

‘Niagara Steck’ and Variegada’ are two grapevine varieties that arose spontaneously as somatic mutants of Rosada’. Berries characterize at young stages exhibiting a remarkable brown reticulated structure on the epidermis which develops into brown-bronze russet-like berries ripe. The mature have strongly acidic flesh. shows notable variegation in leaves berries. Meiotic studies were carried out to ascertain if mutant phenotypes could be related any change chromosome number, or other irregularity. Floral buds both different developmental collected fixed for cytological analyses. Chromosome counts diakinesis/metaphase I showed n=19 bivalents varieties. Univalent, trivalent, tetravalent chromosomes chain configuration not recorded ruling possibility alteration number However, low percentages meiotic irregularities such stickiness, laggards, non-oriented chromosomes, precocious segregation, tetrads with one microcyte, microspore fusion, tetrad degeneration. total percentage abnormalities was higher (19.68%) than (14.40%) may contributed lower pollen fertility (79.80%) when compared ‘Steck’ (90.74%). aforementioned can propagated by hardwood cuttings constitute an interesting option ornamentation home backyards, patios, gardens advantage bearing sweet edible