cline

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cline

(klīn),
A systematic relation between location and the frequencies of alleles; lines connecting points of equal frequency are termed isoclines, and the direction of the cline at any point is at right angles to an isocline.
[G. klinō, to slope]
Farlex Partner Medical Dictionary © Farlex 2012

cline

(klīn)
n.
A gradual change in a character or feature across the distributional range of a species or population, usually correlated with an environmental or geographic transition.

clin′al (klī′nəl) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

cline

a gradual and continuous (or nearly continuous) change in a character (such as size or colour) in relation to its geographical or ecological distribution. For example, there is an increase in the percentage of bridled forms in the guillemot population with more northerly latitudes.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
The absolute difference between slopes was computed for each pair of bootstrap subsamples to produce an empirical distribution of the expected difference between slopes under the null hypothesis of clinal homogeneity across transects.
In large measure, such boundaries are defined by the clinal change in temperature on the East and West coasts of the United States, but longitudinal trends defined in part by trends in precipitation can also play a role, particularly in the Gulf of Mexico.
En el caso particular de la inversion ocular, en una misma especie, se registran variaciones clinales, como es el caso de Platichthys stellatus, cuyo cambio gradual es consecuencia de la seleccion natural (Policansky, 1982b; Fornbacke et al., 2002).
Compared to lipopolysaccharide inject model, CLP model can simulate the progress of polymicrobial sepsis which is more similar to the progress of sepsis in clinal [8].
Hay evidencias que indican que diferentes aspectos del ala (tamano y forma) de especies del genero Drosophila son blanco de la seleccion natural, comprobadas en estudios de variacion clinal (Gilchrist et al.
Maintenance of clinal variation for shell colour phenotype in the flat periwinkle Littorina obtusata.
Despite this clinal and intrapopulation variation in color (Pocock, 1941), there is no record of an ocelot possessing white coloration anywhere except the belly.
Indeed, strong clinal gradients in allozyme allele frequencies [5, 28] and mtDNA haplotypes [3,6] have been found in this species.