Induction of mitotic aneuploidy in lower eukaryotes
- National Research Center Democritus, Athens (Greece)
Genetic tests for induction of mitotic aneuploidy in lower eukarotes used mainly the fungal systems of Aspergillus nidulans and Saccharomyces cerevisiae. There are several differences between the two systems such as the greater tolerance for aneuploidy and the fertility of triploids in S. cerevisiae, the stability of diploids and the selective advantage of haploids over diploids in Aspergillus and the mycelial growth of Aspergillus. On the other hand several similarities also exist between the two systems such as the general instability and varying growth rate of disomics and the random loss of extra chromosomes which produces more competitive types or the most frequent recovery of certain specific aneuploids. In using lower eukaryotes as test systems for the identification of aneugens several points should be considered which concern the relevance of such systems to higher organisms, the ability to identify primary aneuploidy and distinguish this from events, such as chromosomal breaks, which lead to secondary aneuploidy and the ability to obtain repeatable results. Within the framework of an EEC comparative study for evaluating assays for aneuploidy, a number of chemicals were assayed in A. nidulans for mitotic instability due to malsegregation of chromosomes at cell division.
- OSTI ID:
- 28454
- Report Number(s):
- CONF-9210475-Cond.; TRN: 95:001845-0028
- Resource Relation:
- Conference: NATO advanced research workshop, Crete (Greece), 10-15 Oct 1992; Other Information: PBD: 1993; Related Information: Is Part Of Chromosome segregation and aneuploidy; Vig, B.K. [ed.] [University of Nevada, Reno, NV (United States). Dept. of Biology]; PB: 429 p.
- Country of Publication:
- United States
- Language:
- English
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