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Hut, Roelof A.; Paolucci, Silvia; Dor, Roi; Kyriacou, Charalambos P.; Daan, Serge
Proceedings - Royal Society. Biological sciences/Proceedings - Royal Society. Biological Sciences, 08/2013, Letnik: 280, Številka: 1765Journal Article
Properties of the circadian and annual timing systems are expected to vary systematically with latitude on the basis of different annual light and temperature patterns at higher latitudes, creating specific selection pressures. We review literature with respect to latitudinal clines in circadian phenotypes as well as in polymorphisms of circadian clock genes and their possible association with annual timing. The use of latitudinal (and altitudinal) clines in identifying selective forces acting on biological rhythms is discussed, and we evaluate how these studies can reveal novel molecular and physiological components of these rhythms.
