Journal Article

A “Developmental Hourglass” in Fungi

Xuanjin Cheng, Jerome Ho Lam Hui, Yung Yung Lee, Patrick Tik Wan Law and Hoi Shan Kwan

in Molecular Biology and Evolution

Published on behalf of Society for Molecular Biology and Evolution

Volume 32, issue 6, pages 1556-1566
Published in print June 2015 | ISSN: 0737-4038
Published online March 2015 | e-ISSN: 1537-1719 | DOI:
A “Developmental Hourglass” in Fungi

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  • Evolutionary Biology
  • Molecular and Cell Biology


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The “developmental hourglass” concept suggests that intermediate developmental stages are most resistant to evolutionary changes and that differences between species arise through divergence later in development. This high conservation during middevelopment is illustrated by the “waist” of the hourglass and it represents a low probability of evolutionary change. Earlier molecular surveys both on animals and on plants have shown that the genes expressed at the waist stage are more ancient and more conserved in their expression. The existence of such a developmental hourglass has not been...

Keywords: “developmental hourglass”; transcriptomics; mushroom-forming fungus; Coprinopsis

Journal Article.  6303 words.  Illustrated.

Subjects: Evolutionary Biology ; Molecular and Cell Biology

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