The clinal variations of at least some physiological characters does not reflect unevenness at the subspecies boundaries . 至少有一些生理性状的梯度变异反映不出亚种边界的不齐性。
2.
This simple method gives only an indication of the intensity of selection responsible for the inception and maintenance of clinal variation . 这个简单方法只能说明对梯度变异开始和保持起决定作用的强度。
3.
The observed clinal variation in the frequency of serotinous cones may be described as a fairly regular decrease in all directions . 所观察到的晚熟球果的频率梯度变异可描述如下：向四周相当有规律地渐次减少。
