parasexual cycle

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parasexual cycle

[¦par·ə′sek·shə·wəl ′sī·kəl]

(genetics)

A series of events leading to genetic recombination in vegetative or somatic cells even in mammals; it was first described in filamentous fungi; there are three essential steps: heterokaryosis; fusion of unlike haploid nuclei in the heterokaryon to yield heterozygous diploid nuclei; and recombination and segregation at mitosis by two independent processes, mitotic crossing-over and loss of chromosomes.

References in periodicals archive ?

The occurrence of parasexual cycle as mechanism of recombination among Alternaria alternata isolates of a subpopulation from citrus has been suggested (STEWART et al.

grandis indicated the possible occurrence of a parasexual cycle.

Characterization of Alternaria isolates and reaction of potato genotypes to early blight/Caracterizacao de isolados de Alternaria e reacao de genotipos de batata a pinta preta

albicans mating type locus and the delineation of the unique pathway of a parasexual cycle are discussed.