Questions about how insect wings evolved has generated much
debate between whether they originated in accordance with the pleural or tergal hypotheses (Linz and
Tomoyasu, 2018). However, Linz and Tomoyasu (2018) provide evidence for another
hypothesis, that both the pleural and tergal areas contribute to the formation
of wings, via their analysis of the tissues of the non-wing bearing abdomen. It
was found by Linz and Tomoyasu (2018) that through the suppression of certain
Hox genes, abdominalA (abdA) and Ultrabithorax (Ubx), within
Tribolium (Flour beetle) that an area of wing tissue
started to form from both the pleural and tergal regions. This was further investigated by Linz and Tomoyasu (2018)
through RNAi.
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References
Linz, D.M., and Tomoyasu, Y., 2018. Dual evolutionary origin
of insect wings supported by an investigation of the abdominal wing serial
homologs in Tribolium. PNAS. 115: E658-E667; DOI:10.1073/pnas.1711128115
Image:
Victoria Lockwood
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