0 a scale (= set of numbers, levels, etc.) on which things can be arranged in order according to a particular feature or quality:
Some authors have suggested that mean temperature changes along clines are the main selective factor.
However, these clines may not occur on other continents or in other species.
This is because for small there is little selection amongst the genotypes found at the centre, and so the clines there are shallow.
However, numerical solutions suggest that the outcome is qualitatively similar, in that a set of scattered clines is maintained.
This level of challenge is a function of the evolving farming system rather than more variable clines such as the degree of tick control.
There has been surprisingly little empirical work on the quantitative genetics of clines.
The aim of this paper is to give an overview of the theory for clines in an additive polygenic trait.
Clearly, sampling only a subset of the characters may have failed to reveal the occurrence of non-coincident clines.
