The study of the patterns of reproductive isolation in relation to species divergence is critical
for the understanding of the process of speciation. Comparative analyses of this kind were�…

Much of our knowledge of the evolution of reproductive isolation comes from studies of
Drosophila. This body of work has revealed the following patterns:(1) reproductive isolation�…

From literature data on 116 taxa crosses involving 46 species of frogs, we found a positive
correlation between degree of divergence (measured as Nei's genetic distance, D) and�…

An increasing number of animal species of hybrid origin has been detected in recent years
in different groups. In the present paper many of such cases are reviewed in detail and the�…

We analyzed the rate at which postzygotic incompatibilities accumulate in birds. Our
purposes were to assess the role of intrinsic F1 hybrid infertility and inviability in the�…

I present patterns characterizing the evolution of intrinsic postzygotic isolation in Lepidoptera
by analyzing data from the literature on genetic distance, strength of hybrid sterility and�…

The first review of the phenomenon of interspecific hybridization in animals appears to be
that of Haldane (1922), who catalogued all cases known to that time in which crosses�…

A study was conducted to investigate the factors which affect postmating, genetic exchange
and hybrid sterility among closely related species. Drosophila species were used in the�…

Various concepts of evolutionary biology are reviewed to emphasize the significance of
premating isolation barriers in processes of speciation. Concepts such as sexual selection�…

Hybrid sterility and inviability often result from the accumulation of substitutions that, while
functional on their normal genetic backgrounds, cause a loss of fitness when brought�…