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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Sexual reproduction selects for robustness and negative epistasis in artificial gene networks

Article Abstract:

The relation between negative epistasis, a type of genetic interaction, and sexual reproduction is discussed. Using an artificial gene network model, it is found that recombination between gene network imposes selection for genetic robustness, and that negative epistasis can evolve as a consequence of sexual reproduction itself.

Author: Azevedo, Ricardo B.R., Burch, Christina L., Srinivasan, Suraj, Lohaus, Rolf, Dang, Kristen K.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
Sexual reproduction

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Epistasis and balanced polymorphism influencing complex trait variation

Article Abstract:

A one-centimorgan chromosome interval in Arabidopsis thyaliana without regard to its effect on growth rate is identified and the signature of historical sequence polymorphism among Arabidopsis accessions is examined. It is found that the interval contained two growth rate quantitative trait loci (QTL) within 210 kilobases.

Author: Kroymann, Juergen, Mitchell-olds, Thomas
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
United States, Genetic polymorphisms

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A cytosolic trans-activation domain essential for ammonium uptake

Article Abstract:

Studies show that cytosolic C terminus (CCT) of ammonium transporter serves as regulator of cellular uptake. Phosphorylation of CCT regulates transportation and rapid transporter shut down to protect against over accumulation of ammonia is provided by allosteric transactivation.

Author: Loque, D., Lalonde, S., Looger, L.L., von Wiren, N., Frommer, W.B.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2007
Carrier proteins, Transport proteins, Cytosol, Structure, Chemical properties, Ammonium compounds, Ammonium chloride, Ammonium paratungstate, Ammonium salts, Report

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Subjects list: Research, Genetic aspects, Genetic epistasis, Epistasis, Arabidopsis thaliana
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