Differential transcriptional regulation of sulfur assimilation gene homologues in the Saccharomyces carlsbergensis yeast species hybrid
The allopolyploid yeast Saccharomyces carlsbergensis appears to be a relatively newly formed species hybrid, and therefore constitutes a good model for studying early steps in hybrid speciation. Using reverse transcription-coupled polymerase chain reaction to monitor derepression of the S. carlsberg...
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Veröffentlicht in: | FEMS yeast research 2002, Vol.1 (4), p.315-322 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The allopolyploid yeast
Saccharomyces carlsbergensis appears to be a relatively newly formed species hybrid, and therefore constitutes a good model for studying early steps in hybrid speciation. Using reverse transcription-coupled polymerase chain reaction to monitor derepression of the
S. carlsbergensis homologues of the sulfur assimilation genes
MET14 and
MET2, we found that both homologues of these genes are regulated in the same pathway-specific manner, but surprisingly, with different kinetics, as the genes derived from one of the parent species (the non-
Saccharomyces cerevisiae-like) are alleviated from repression much faster than the genes from the other parent (the
S. cerevisiae-like). This probably reflects differing physiological adaptation of the parent species, and the finding may contribute to the general understanding of hybrid speciation. |
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ISSN: | 1567-1356 1567-1364 |
DOI: | 10.1016/S1567-1356(01)00050-2 |