The inheritance of light-cream coloration of vegetative parts in yellow lupin plants was studied. It was found that this trait is inherited monomerically. In homozygous system the gene responsible for light-cream coloration has a plieotropic action. Among others it causes a lower fertility and reduction of seed yield per plant. In heterozygous system symptoms of heterosis are observed. In many aspects the action of dilutus gene is similar to that of dwarf gene in yellow lupin previously described by the authors of this paper.
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%.
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