Email updates

Keep up to date with the latest news and content from BMC Biology and BioMed Central.

Journal App

google play app store
Open Access Highly Accessed Interview

Beyond Darwin: evolvability and the generation of novelty

Marc Kirschner

BMC Biology 2013, 11:110  doi:10.1186/1741-7007-11-110

PubMed Commons is an experimental system of commenting on PubMed abstracts, introduced in October 2013. Comments are displayed on the abstract page, but during the initial closed pilot, only registered users can read or post comments. Any researcher who is listed as an author of an article indexed by PubMed is entitled to participate in the pilot. If you would like to participate and need an invitation, please email info@biomedcentral.com, giving the PubMed ID of an article on which you are an author. For more information, see the PubMed Commons FAQ.

The differentiation tree as a source of novelty and evolvability

Richard Gordon   (2013-11-14 10:58)  Gulf Specimen Marine Laboratory















Dear Marc,

You suggest that: “One [approach] is to look at development - embryology - …to try and understand how things might have changed, what was the underlying nature of the change. And not just what are the genetic differences…. We want to explain big things….” I didn’t use the word “evolvability” in Gordon (1999), but nevertheless proposed a model that places much of the origin of novelty in embryonic differentiation:

“Proposition 69: a major step in the evolution of multicellular organisms was the ability to generate the next cell state splitter and accompanying differentiation triggers and commitment signal, i.e., the invention of continuing differentiation with postponed terminal differentiation….

Proposition 70: the evolution of continuing differentiation coincided with the ability to duplicate terminal branches of the differentiation tree….

In duplication of terminal branches of the differentiation tree, novelty comes not so much from the opportunities for new proteins, as from the opportunities for new tissues.”

The initial duplication mutation is likely to produce one of your “non-lethal phenotypic changes”, and a bit of coevolution could iron out minor problems (Figures 24-26). You might want to have a look at it. Thanks.

Yours, -Dick Gordon

Gordon, R. (1999). The Hierarchical Genome and Differentiation Waves: Novel Unification of Development, Genetics and Evolution. Singapore & London, World Scientific & Imperial College Press.

Competing interests

None declared

top

Post a comment