EN
Somatic chromosome number was investigated in twenty doubled haploid (DH) lines derived from anther culture of two triticale cultivars. Nine lines have 42 chromosomes, the rest ranging from 39 to 43. The majority of aberrants (90%) are hypoaneuploids (2n = 39 to 41), but within the KR424 line both hypo- (2n = 39 to 41) and hyperaneuploid (2n = 43) chromosome numbers were identified. The observed frequency of seedlings with aneuploid chromosome numbers within several unstable lines varied from 4% to 31.2%.