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Regulatory Punctuated Equilibrium and Convergence in the Evolution of Developmental Pathways in Direct‐developing Sea Urchins by Elizabeth C. Raff; Ellen M. Popodi; Jeffery S. Kauffman; Belinda J. Sly; F. Rudolf Turner; Valerie B. Morris; Rudolf A. Raff is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Regulatory Punctuated Equilibrium and Convergence in the Evolution of Developmental Pathways in Direct‐developing Sea Urchins about?

**Summary** We made hybrid crosses between closely and distantly related sea urchin species to test two hypotheses about the evolution of gene regulatory systems in the evolution of ontogenetic pathways and larval form. The first hypothesis is that gene regulatory systems governing development evolve in a punctuational manner during periods of rapid morphological evolution but are relatively stable over long periods of slow morphological evolution. We compared hybrids between direct and indirect developers from closely and distantly related families. Hybrids between eggs of the direct developer __Heliocidaris erythrogramma__ and sperm of the 4‐million year distant species __H. tuberculata__, an indirect developer, restored feeding larval structures and paternal gene expression that were lost in the evolution of the direct‐developing maternal parent. Hybrids resulting from the cross between eggs of __H. erythrogramma__ and sperm of the 40‐million year distant indirect‐developer __Pseudoboletia maculata__ are strikingly similar to hybrids between the congeneric hybrid__s__. The marked similarities in ontogenetic trajectory and morphological outcome in crosses of involving either clos

Who reads Regulatory Punctuated Equilibrium and Convergence in the Evolution of Developmental Pathways in Direct‐developing Sea Urchins?

Author

Elizabeth C. Raff; Ellen M. Popodi; Jeffery S. Kauffman; Belinda J. Sly; F. Rudolf Turner; Valerie B. Morris; Rudolf A. Raff

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 1520-541X)

Published

2003

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)