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Hybrid speciation in experimental populations of yeast.
- Source :
-
Science (New York, N.Y.) [Science] 2002 Nov 29; Vol. 298 (5599), pp. 1773-5. - Publication Year :
- 2002
-
Abstract
- Most models of speciation require gradual change and geographic or ecological isolation for new species to arise. Homoploid hybrid speciation occurred readily between Saccharomyces cerevisiae and Saccharomyces paradoxus. Hybrids had high self-fertility (about 82%), low fertility when backcrossed to either parental species (about 7.5%), and vigorous growth under different thermal environments that favored one or the other of the parental species. Extensive karyotypic changes (tetrasomy) were observed in the hybrids, although genic incompatibilities accounted for 50% of the variation in self-fertility.
- Subjects :
- Aneuploidy
Chromosomes, Fungal genetics
Chromosomes, Fungal physiology
Crosses, Genetic
Crossing Over, Genetic
Fertility
Genetic Variation
Karyotyping
Polymerase Chain Reaction
Saccharomyces physiology
Saccharomyces cerevisiae physiology
Spores, Fungal physiology
Hybridization, Genetic
Saccharomyces genetics
Saccharomyces cerevisiae genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1095-9203
- Volume :
- 298
- Issue :
- 5599
- Database :
- MEDLINE
- Journal :
- Science (New York, N.Y.)
- Publication Type :
- Academic Journal
- Accession number :
- 12459586
- Full Text :
- https://doi.org/10.1126/science.1076374