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Updated: Jul 11, 2026

A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia

A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia

Published on: June 15, 2011

Mate selection and the evolution of highly polymorphic self/nonself recognition genes.

R K Grosberg¹, M W Hart

¹Section of Evolution and Ecology and Center for Population Biology, One Shields Drive, University of California, Davis, CA 95616, USA. rkgrosberg@ucdavis.edu

Science (New York, N.Y.)

|September 23, 2000

Summary

Genetic diversity in self/nonself recognition is crucial for multicellular organisms. In marine invertebrates, competition, not mate choice, appears to drive the evolution of this allorecognition polymorphism.

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Area of Science:

Genetics
Evolutionary Biology
Marine Biology

Background:

Multicellular organisms utilize polymorphic genes for self/nonself recognition, impacting various biological interactions.
Allorecognition polymorphisms are vital for distinguishing self from nonself, influencing host-pathogen, competitive, and reproductive interactions.
The precise mechanisms maintaining genetic polymorphism for self/nonself recognition specificity remain incompletely understood.

Purpose of the Study:

To investigate the factors maintaining allorecognition polymorphism in two colonial marine invertebrate species.
To determine the relative contributions of mate selection versus intraspecific competition in driving allorecognition polymorphism.
To challenge previous assumptions regarding the role of mate choice in allorecognition evolution.

Main Methods:

Field studies on two colonial marine invertebrate species.
Analysis of genetic data related to allorecognition genes.
Behavioral observations and experimental manipulations to assess competitive and reproductive interactions.

Main Results:

Contrary to prior research, mate selection was found to be a weak force in maintaining allorecognition polymorphism in the studied species.
Evidence suggests that the regulation of intraspecific competitive interactions is a significant driver of allorecognition polymorphism evolution.
Rare alleles may confer advantages in both competitive and reproductive contexts, but competition appears dominant in these species.

Conclusions:

Intraspecific competition, rather than mate selection, plays a primary role in maintaining allorecognition polymorphism in these colonial marine invertebrates.
The findings necessitate a re-evaluation of the evolutionary forces shaping self/nonself recognition systems.
Understanding these mechanisms is crucial for comprehending immune system evolution and ecological interactions.