Verhulst S, Maes F W
Zoological Laboratory, University of Groningen, Haren, The Netherlands.
Vision Res. 1998 Nov;38(21):3387-90. doi: 10.1016/s0042-6989(97)00339-8.
Alleles causing colour-blindness are present in humans at non-negligible levels, and it is not yet understood how colour-blindness is maintained, since colour-vision probably provides a selective advantage, e.g. when foraging. We show that after dark-adaptation colour-blinds had lower light perception thresholds than colour-normals (0.44 log-units), which may give a selective advantage under scotopic conditions, which may offset the disadvantage that colour-blinds suffer during foraging.
导致色盲的等位基因在人类中的存在水平不可忽视，目前尚不清楚色盲是如何维持的，因为色觉可能具有选择优势，例如在觅食时。我们发现，在暗适应后，色盲者的光感知阈值比色觉正常者低（0.44对数单位），这可能在暗视条件下带来选择优势，从而抵消色盲者在觅食过程中所遭受的劣势。
