The yeast, Saccharomyces cerevisiae, was used as a model to investigate theories of ploidy evolution. Mutagenesis experiments using the alkylating agent EMS (ethane methyl sulphonate) were conducted to assess the relative importance that masking of deleterious mutations has on response to and recovery from DNA damage. In particular, we tested whether cells with higher ploidy levels have relativ...

Previous studies demonstrated the effects of polyploidy on various aspects of plant life. It is, however, difficult to determine which plant characteristics are responsible for fitness differences between cytotypes. We assessed the relationship between polyploidy and seed production. To separate the effects of flowering phenology, flower head size and herbivores from other possible causes, we c...

The genus Narcissus belongs to the family Amaryllidaceae. This has been subject of numerous cytological and cytometric studies have shown enormous variation in terms genome size, ploidy level, even basic chromosome number. numbers are 5 or 7, but 10, 11, 12 recorded as well. Most narcissus cultivars euploid tetraploids. There also triploids. Some aneuploid such tetraploids triploids, with missi...