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AOBPreview originally published online on July 28, 2007
Annals of Botany 2007 100(5):1017-1025; doi:10.1093/aob/mcm122
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© 2007 The Author(s)
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Genetic Changes Accompanying the Domestication of Pisum sativum: Is there a Common Genetic Basis to the ‘Domestication Syndrome’ for Legumes?

Norman F. Weeden*

Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT, USA

* For correspondence. E-mail nweeden{at}montana.edu

Received: 11 October 2006    Returned for revision: 8 December 2006    Accepted: 22 May 2007    Published electronically: 28 July 2007

Background and Aims: The changes that occur during the domestication of crops such as maize and common bean appear to be controlled by relatively few genes. This study investigates the genetic basis of domestication in pea (Pisum sativum) and compares the genes involved with those determined to be important in common bean domestication.

Methods: Quantitative trait loci and classical genetic analysis are used to investigate and identify the genes modified at three stages of the domestication process. Five recombinant inbred populations involving crosses between different lines representing different stages are examined.

Key Results: A minimum of 15 known genes, in addition to a relatively few major quantitative trait loci, are identified as being critical to the domestication process. These genes control traits such as pod dehiscence, seed dormancy, seed size and other seed quality characters, stem height, root mass, and harvest index. Several of the genes have pleiotropic effects that in species possessing a more rudimentary genetic characterization might have been interpreted as clusters of genes. Very little evidence for gene clustering was found in pea. When compared with common bean, pea has used a different set of genes to produce the same or similar phenotypic changes.

Conclusions: Similar to results for common bean, relatively few genes appear to have been modified during the domestication of pea. However, the genes involved are different, and there does not appear to be a common genetic basis to ‘domestication syndrome’ in the Fabaceae.

Key words: Domestication syndrome, genetics, Pisum sativum, Phaseolus vulgaris, seed dispersal, seed dormancy, roots


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