Four new first-degree relationships between powdery mildew resistant accessions discovered in the study. (A) We identified two first-degree relationships in relation to ‘Kishmish vatkana’. ‘Vassarga tchernaia’ was identified as the female parent of 'Kishmish vatkana' and ‘Sochal’ as parent to ‘Vassarga tchernaia’. We also verified ‘Thompson seedless’ as the male parent based on the analysis with 34 SSR markers. (B) The third first-degree relationship was detected between ‘Karadzhandal’ and ‘Late Vavilov’; both are hermaphrodite with seeded fruit. (C) A fourth parent progeny relationship was detected between ‘Yarghouti’ and ‘Khalchili’.