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[Arthropod] Gene duplicates and expression divergence in arthropods

Don Gilbert via arthropod%40net.bio.net (by gilbertd from net.bio.net)
Fri Jun 19 11:47:25 EST 2015

Dear arthropodists,

  Complexity of Gene Expression Evolution after Duplication: Protein Dosage
  Rebalancing, 2014 by Igor B. Rogozin; http://dx.doi.org/10.1155/2014/516508
  "This paper discusses expression divergence of recent duplications
  occurring before functional divergence of proteins encoded by duplicate

This is first paper I've seen that discusses and incorporates our
ideas[1] (observations + theory) on why Daphnia pulex has so many gene
duplications.  There may well be other such papers, apparently there is
literature now on expression divergence among recent paralog genes, as
we observed in Daphnia.

Some of observation literature on gene dups found in non model species
may be suggesting that crustaceans, or some lineages of them, have more
extensive duplications than other arthropod clades.   Do any of you
readers have knowledge of this?   

There are gene family expansions of various kinds scattered thru
arthropod phylum, but I would be interested to learn if some
crustaceans have a wider range of duplicates than other clades.

Among the evolutionary hypotheses for why, if that is the case, it may
be as a colleaugue suggested for Daphnia, and other crustacea in
ephemeral aquatic enviroments: they are like plants in using their
genes, and gene duplicates, as chemical-factory-like responses to
fluctuating harsh environments that they cannot walk away from.

-- Don Gilbert

[1] J. K. Colbourne, M. E. Pfrender, D. Gilbert et al., 2011. "The ecoresponsive
genome of Daphnia pulex," Science, 331 (6017): 555-561.

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