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Functional conservation and diversification of yellow-y in lepidopteran insects. | LitMetric

Functional conservation and diversification of yellow-y in lepidopteran insects.

Insect Biochem Mol Biol

Department of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan. Electronic address:

Published: January 2021

AI Article Synopsis

  • The study investigates the role of the yellow-y gene in the pigmentation of the tobacco cutworm, Spodoptera litura, which is related to the diverse colors and patterns in Lepidoptera.
  • By using CRISPR/Cas9 to mutate the yellow-y gene, researchers found it crucial for normal black pigmentation and that it has species- and tissue-specific functions.
  • Additionally, the study revealed that yellow-y is important for egg hatching, expanding the understanding of the gene's roles in insects.

Article Abstract

The diverse colors and patterns found in Lepidoptera are important for success of these species. Similar to the wings of adult butterflies, lepidopteran larvae exhibit diverse color variations to adapt to their habitats. Compared with butterfly wings, however, less attention has been paid to larval body colorations and patterns. In the present study, we focus on the yellow-y gene, which participates in the melanin synthesis pathway. We conducted CRISPR/Cas9-mediated targeted mutagenesis of yellow-y in the tobacco cutworm Spodoptera litura. We analyzed the role of S. litura yellow-y in pigmentation by morphological observation and discovered that yellow-y is necessary for normal black pigmentation in S. litura. We also showed species- and tissue-specific requirements of yellow-y in pigmentation in comparison with those of Bombyx mori yellow-y mutants. Furthermore, we found that almost none of the yellow-y mutant embryos hatched unaided. We provide evidence that S. litura yellow-y has a novel important function in egg hatching, in addition to pigmentation. The present study will enable a greater understanding of the functions and diversification of the yellow-y gene in insects.

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Source
http://dx.doi.org/10.1016/j.ibmb.2020.103515DOI Listing

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