Document Detail

Molecular and cellular mechanisms of diversity within grapevine varieties.
MedLine Citation:
PMID:  19935824     Owner:  NLM     Status:  MEDLINE    
A grapevine variety consists of an array of clones descended by vegetative propagation from a single selected vine grown from a single seedling. A majority of the clones within a variety are identical, but some can show divergent genotypes and, to some extent, divergent phenotypes. Polymorphism results mainly from somatic mutations that occur naturally during plant growth. Various types of mutations were shown to be responsible for genetic diversity among clones: point mutations, large deletions, illegitimate recombination or variable number of repeats in microsatellite sequences. In most cases, somatic mutations do not affect the whole plant; rather, they affect only one cell layer, leading to periclinal chimeras. Such structures do not threaten the plant's fitness and are stable through vegetative propagation. Occasionally, cellular rearrangements in the chimera lead to homogenization of the genotype of the whole plant. Through these molecular and cellular mechanisms, the genotypes of clones drift over time and grapevine varieties evolve.
F Pelsy
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Publication Detail:
Type:  Journal Article; Review     Date:  2009-11-25
Journal Detail:
Title:  Heredity     Volume:  104     ISSN:  1365-2540     ISO Abbreviation:  Heredity     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-03-24     Completed Date:  2010-06-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0373007     Medline TA:  Heredity     Country:  England    
Other Details:
Languages:  eng     Pagination:  331-40     Citation Subset:  IM    
INRA, UMR1131, F-68000, Colmar, France.
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MeSH Terms
Evolution, Molecular
Genetic Variation / genetics,  physiology*
Microsatellite Repeats
Models, Biological
Polymorphism, Genetic
Species Specificity
Vitis / genetics*
Comment In:
Heredity. 2010 Apr;104(4):327-8   [PMID:  20010959 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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