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  • Title: Heterogeneity in the ribosomal family of the yeast Yarrowia lipolytica: genomic organization and segregation studies.
    Author: Fournier P, Gaillardin C, Persuy MA, Klootwijk J, van Heerikhuizen H.
    Journal: Gene; 1986; 42(3):273-82. PubMed ID: 3015740.
    Abstract:
    The cloned r-DNA units of Yarrowia lipolytica [Van Heerikhuizen et al., 39 (1985) 213-222] and their restriction fragments have been used to probe blots of genomic DNA of this yeast. Wild-type and laboratory strains were shown to contain two-to-five types of repeated units, each strain displaying a specific pattern. By comparing their restriction patterns, we could localize the differences between units within their spacer region. Tetrad analysis strongly suggested a clustered organization of each type of repeat as well as the occurrence of meiotic exchanges within the r-DNA family. Chromosome loss was induced by benomyl and allowed to map several r-DNA clusters on the same chromosome. All those results indicate that the Y. lipolytica r-DNA gene family is quite different from other yeasts.
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