HYBRIDIZATION, HOMOGAMY, AND SYMPATRIC SPECIATION
نویسندگان
چکیده
منابع مشابه
Sympatric speciation
What is sympatric speciation? The likelihood of sympatric speciation is perhaps the most controversial aspect of speciation, and certainly one of the most contested questions in evolutionary biology. Speciation in general is defined as the evolution of strong, genetically based ‘isolating barriers’ between populations that prevent them from exchanging genes, for example, mate discrimination, ha...
متن کاملSympatric Speciation in Insects
Insects are among the most abundant multicellular organisms on earth. Sampling in the tropics and subtropics suggests that there are 10 to 30 million species of insects (Erwin 1982). As a group, invertebrate insects, therefore, represent an inordinately large percentage of the world’s fauna, far outnumbering their larger and more conspicuous vertebrate cousins, such as fish (about 24 000), amph...
متن کاملSympatric speciation without borders?
The biogeography of speciation remains a controversial issue and the process of allopatric speciation reigns. Sympatric speciation differs from allopatric speciation in terms of geographic setting and the role of selection in bringing about reproductive isolating mechanisms, making it a particularly fascinating and controversial subject for evolutionary biologists. Mayr (1947) explained the dif...
متن کاملSimulated ecology-driven sympatric speciation
We introduce a multi-locus genetically acquired phenotype, submitted to mutations and with selective value, in an age-structured model for biological aging. This phenotype describes a single-trait effect of the environment on an individual, and we study the resulting distribution of this trait among the population. In particular, our simulations show that the appearance of a double phenotypic a...
متن کاملHybridization and speciation.
Hybridization has many and varied impacts on the process of speciation. Hybridization may slow or reverse differentiation by allowing gene flow and recombination. It may accelerate speciation via adaptive introgression or cause near-instantaneous speciation by allopolyploidization. It may have multiple effects at different stages and in different spatial contexts within a single speciation even...
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ژورنال
عنوان ژورنال: Evolution
سال: 1955
ISSN: 0014-3820,1558-5646
DOI: 10.1111/j.1558-5646.1955.tb01553.x