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Spatial Distribution Characteristics and Risk Assessment of Soil Heavy Metals from Long-Term Mining Activities: A Case Study of the Fengfeng Mining Area. [PDF]
ToxicsRen L, Qi W, Ye H.
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Science, 2007 Like the formation of animal species, plant speciation is characterized by the evolution of barriers to genetic exchange between previously interbreeding populations. Prezygotic barriers, which impede mating or fertilization between species, typically contribute more to total reproductive isolation in plants than do postzygotic barriers, in which ...
Loren H Rieseberg
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Nature, 2007
Botanists have long believed that hybrid speciation is important, especially after chromosomal doubling (allopolyploidy). Until recently, hybridization was not thought to play a very constructive part in animal evolution. Now, new genetic evidence suggests that hybrid speciation, even without polyploidy, is more common in plants and also animals than ...
James Lb Mallet
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Botanists have long believed that hybrid speciation is important, especially after chromosomal doubling (allopolyploidy). Until recently, hybridization was not thought to play a very constructive part in animal evolution. Now, new genetic evidence suggests that hybrid speciation, even without polyploidy, is more common in plants and also animals than ...
James Lb Mallet
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Current Opinion in Genetics & Development, 2004
Until recently, the genes that cause reproductive isolation remained black boxes. Consequently, evolutionary biologists were unable to answer several questions about the identities and characteristics of "speciation genes". Over the past few years, however, evolutionary geneticists have finally succeeded in isolating several such genes, providing our ...
H Allen, Orr +2 more
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Until recently, the genes that cause reproductive isolation remained black boxes. Consequently, evolutionary biologists were unable to answer several questions about the identities and characteristics of "speciation genes". Over the past few years, however, evolutionary geneticists have finally succeeded in isolating several such genes, providing our ...
H Allen, Orr +2 more
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Cold Spring Harbor Perspectives in Biology
What drives the emergence of new species has fascinated biologists since Darwin. Reproductive barriers to gene flow are a key step in the formation of species, and recent advances have shed new light on how these are established. Genetic, genomic, and comparative techniques, together with improved theoretical frameworks, are increasing our ...
Peichel, C.L. +4 more
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What drives the emergence of new species has fascinated biologists since Darwin. Reproductive barriers to gene flow are a key step in the formation of species, and recent advances have shed new light on how these are established. Genetic, genomic, and comparative techniques, together with improved theoretical frameworks, are increasing our ...
Peichel, C.L. +4 more
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TAXON, 1969
SummaryA discussion of speciation subsumes that we know what a species is, which operationally is true. Populations that are physiologically incapable of gene exchange and are phenotypically distinguishable pose no problem at the species level. When barriers are not absolute or when they are complete but the phenotypic differences are inconspicuous one
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SummaryA discussion of speciation subsumes that we know what a species is, which operationally is true. Populations that are physiologically incapable of gene exchange and are phenotypically distinguishable pose no problem at the species level. When barriers are not absolute or when they are complete but the phenotypic differences are inconspicuous one
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2016
Abstract Chapter 14 meditates on the classic theme of speciation. It first presents the idea of evolutionary branching in adaptive dynamics. The chapter then treats morph loss in the rock-paper-scissors game and two modes of mate choice: preference of males to maintain coadapted gene complexes versus preference for rare males to produce ...
Daniel Friedman, Barry Sinervo
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Abstract Chapter 14 meditates on the classic theme of speciation. It first presents the idea of evolutionary branching in adaptive dynamics. The chapter then treats morph loss in the rock-paper-scissors game and two modes of mate choice: preference of males to maintain coadapted gene complexes versus preference for rare males to produce ...
Daniel Friedman, Barry Sinervo
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1998
Abstract Eukaryotic sex has given rise to the evolution of nurturing, the evolution of love, and the evolution of multicellularity and death. Here we consider a final manifestation: Sexual eukaryotes came to adopt the evolutionary pattern known as speciation, which segregates organisms into those that will and will not mate with one ...
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Abstract Eukaryotic sex has given rise to the evolution of nurturing, the evolution of love, and the evolution of multicellularity and death. Here we consider a final manifestation: Sexual eukaryotes came to adopt the evolutionary pattern known as speciation, which segregates organisms into those that will and will not mate with one ...
openaire +1 more source