16 research outputs found
Location of stationary points of potential energy surfaces : II. A new procedure for finding saddle points
Tetragonally distorted tetrahedral ML4-complexes 3. : Splitting of the d4-configuration in strong ligand field of D24 symmetry
Absorption spectra of inorganic coordination complexes : II. Bands Assigned to symmetry forbidden electronic transitions in the absorption spectra of complex cyanids of some transition metals
Theoretical study of the adsorption of CO molecules on stepped single crystal PT surfaces : Preliminary communication
Simulated semiempirical molecular orbital calculations 1. : Transferability of Fock matrix elements
Evolution and genetic architecture of sex-limited polymorphism in cuckoos
Sex-limited polymorphism has evolved in many species including our own. Yet, we lack a detailed understanding of the underlying genetic variation and evolutionary processes at work. The brood parasitic common cuckoo (Cuculus canorus) is a prime example of female-limited color polymorphism, where adult males are monochromatic gray and females exhibit either gray or rufous plumage. This polymorphism has been hypothesized to be governed by negative frequency-dependent selection whereby the rarer female morph is protected against harassment by males or from mobbing by parasitized host species. Here, we show that female plumage dichromatism maps to the female-restricted genome. We further demonstrate that, consistent with balancing selection, ancestry of the rufous phenotype is shared with the likewise female dichromatic sister species, the oriental cuckoo (Cuculus optatus). This study shows that sex-specific polymorphism in trait variation can be resolved by genetic variation residing on a sex-limited chromosome and be maintained across species boundaries