出版社
WILEY
DOI: 10.1002/jez.b.23220
关键词
brachycera; color vision; diptera; gene loss; opsin; Teleopsis dalmanni
This study revealed the conservation of most brachyceran opsin homologs in the genome assembly of T. dalmanni, except for the UV wavelength range-sensitive homolog Rh4. These findings highlight the caution that needs to be applied to gene loss conclusions.
Due to the unique morphology of their adult visual system, stalk-eyed flies represent an important model of exaggerated trait evolution through sexual selection. Early physiological measurements indicated wavelength sensitivity peaks in the ultraviolet (360 nm), blue (450), blue-green (490 nm), and red (>550 nm) ranges in the compound eye retina of the stalk-eyed fly Teleopsis dalmanni, consistent with the trichromatic color and broad range motion detection vision system of brachyceran Diptera. A previous study of dipteran opsin gene diversification, however, detected only homologs of members of the long wavelength range sensitive opsin subfamilies Rh2 and Rh6 in T. dalmanni. Here, I report findings from analyzing the most recent T. dalmanni genome assembly, which revealed the conservation of most brachyceran opsin homologs except for the UV wavelength range-sensitive homolog Rh4. These results and other examples highlight the caution that needs to be applied to gene loss conclusions.
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