[Productivity of autotetraploids and frequency of aneuploidy in reproduction in Haplopappus gracilis L]. / Plodovitost' autotetraploidov i chastota vstrechaemosti aneuploidov v protsesse razmnozheniia u Haplopappus gracilis L.

Comparative studies of productivity of autotetraploid plants H. gracilis L. after selection for high productivity, without selection for high productivity and aneuploidity, and after selection for low productivity have been done. The results show considerable effectiveness of selection for productivity. Presence of hyperaneuploid forms in the population is a major cause of the decreasing of autotetraploid productivity.

[Manifestation of "hairy leaf" trait in mangel beet]. / Proiavlenie priznaka opushennosti listovoi plastinki u kormovoi svekly.

New morphological trait, "Hairy leaf", of mangel beet has been picked out. Dominant character and monogenic inheritance of the trait were found. Comparative analysis of manifestation of this trait in mangel and sugar beets was done. It is shown that the gene of "hairiness" (Hl) in sugar beet is not allelic to the Hlvar gene in mangel beet. This trait can be used as a marker in selection-genetical investigation.