Freethought & Rationalism Archive

ps418 · 12-01-2002, 11:23 AM

An interesting article discussing hybrid speciation in yeast under experimental conditions.

Quote:

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.

Greig et al., 2002. Hybrid Speciation in Experimental Populations of Yeast. Science 298, Number 5599, Issue of 29 Nov 2002, pp. 1773-1775.

Thread Tools	Search this Thread
Show Printable Version	Search this Thread: Advanced Search

Freethought & Rationalism Archive

The archives are read only.