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Silk moth s diapause reverts back to ancestors through gene editing!?

E-Mail IMAGE: Differences in the environmental signals utilized as cues to determine alternative diapause between domesticated silkworm and Bombyx mandarina. view more Credit: Copyright © 2021, Kunihiro Shiomi, Shinshu University Diapause is a phenomenon in which animals and insects foresee changes in the environment and actively reduce metabolism, or halt regular differentiation and development. It is an adaptation strategy for adverse environments such as surviving winters, but also to encourage uniform growth of the generational group. By knocking out genes that allow the silkworm to detect temperature, researchers at Shinshu University et al. found that the silk moth diapause changes from temperature to photoperiod, or day length. This is not only valuable as an elucidation of the molecular mechanism in the environmental response mechanism of organisms such as insects, but also a very important finding in exploring the process of domestication of silk moths. The

Yoko takasuMisato shimodaKunihiro shiomiShigeru saitoYoshiomi katoMasakazu kobayashiMakoto tominagaAkira mizoguchiHideki sezutsuTakeshi yokoyamaMisato shimoda gunma sericultural technology centerTechnology for scientific researchFood research organizationShigeru saito national institute for physiological sciencesDepartment of applied biological sciencesBiofunction utilization research division

Silkworm s brain determines diapause by thermal information

E-Mail IMAGE: Thionin staining of embryos 8 days after oviposition in DW-injected silkworms and 60 days after oviposition in DH-injected and PTX-injected silkworms in wt of N4 strain. (Scale bar: 200μm). view more Credit: Copyright 2020, PNAS, Licensed under CC BY 4.0 Diapause is a seasonal adaptation strategy of insects and animals where biological functions are put on hold, such as insect eggs that remain dormant until conditions are more favorable to hatch. This is not a passive response of dormancy to adverse situations but an actively induced state that takes place well in advance in anticipation of natural conditions. Although it has been hypothesized that the neuroendocrine systems are associated with seasonal reproductive plasticity, the morphological, physiological, behavioral, reproductive responses of diapause remain unclear.

Yoko takasuKunihiro shiomiAino kaneshimaMasakazu kobayashiAkira mizoguchiYoshima tsuchidaYoshiaki tanakaHideki sezutsuMaki yamazakiCorazonin crzFood research organizationNational agricultureAichi gakuin universityShinshu universityNaito memorial science foundationDainippon silk foundation

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