Alternate loss of YML051w between S. cerevisiae andS. uvarum. (Gray and black arrows) ORFs homologous with genes located on S. cerevisiae chromosome X and XIII, respectively. (White arrow) An ambiguous match with both YML047c andYJR054w. (A) Chromosomal mapping ofSuYML051w: the ORF SuYML051w is associated toSuYJR054w and to SuYJR057w/SuYJR058c in two different plasmid inserts of the S. uvarum library (Table 2). TheSuYML051w probe hybridized onto chromosome SuX (hybridization not shown). (B) Trans-chromosomal series: gene couples corresponding to a mosaic of S. cerevisiaechromosomes X and XIII identified in three different Génolevures species. (C) Hypothetical ancestral gene order before duplication: compilation of the gene couples identified in the three species.
