Abstract
BACKGROUND AND AIMS: The overall goal of this paper is to construct an overview of the genetic basis for flower size evolution in Silene latifolia. It aims to examine the relationship between the molecular bases for flower size and the underlying assumption of quantitative genetics theory that quantitative variation is ultimately due to the impact of a number of structural genes. SCOPE: Previous work is reviewed on the quantitative genetics and potential for response to selection on flower size, and the relationship between flower size and nuclear DNA content in S. latifolia. These earlier findings provide a framework within which to consider more recent analyses of a joint quantitative trait loci (QTL) analysis of flower size and DNA content in this species. KEY RESULTS: Flower size is a character that fits the classical quantitative genetics model of inheritance very nicely. However, an earlier finding that flower size is correlated with nuclear DNA content suggested that quantitative aspects of genome composition rather than allelic substitution at structural loci might play a major role in the evolution of flower size. The present results reported here show that QTL for flower size are correlated with QTL for DNA content, further corroborating an earlier result and providing additional support for the conclusion that localized variations in DNA content underlie evolutionary changes in flower size. CONCLUSIONS: The search image for QTL should be broadened to include overall aspects of genome regulation. As we prepare to enter the much-heralded post-genomic era, we also need to revisit our overall models of the relationship between genotype and phenotype to encompass aspects of genome structure and composition beyond structural genes.
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Claims 5
Claim · model-written summary
Flower size fits a classical quantitative genetics inheritance model.
- Taxon
- Silene latifolia
_Silene_latifolia_-_flower.jpg?width=60)
Silene latifoliat0 - Outcome
- Flower sizee0
- Qualifier
- fits the classical quantitative genetics model of inheritance very nicelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Silene_latifolia_-_flower.jpg?width=500)
Verbatim
e0“Flower size is a character that fits the classical quantitative genetics model of inheritance very nicely.”
t0“Silene latifolia”
Claim · model-written summary
Flower size QTL were correlated with DNA content QTL.
- Taxon
- Silene latifoliaSilene latifoliat0
- Gene
- QTL for DNA contente0
- Outcome
- QTL for flower sizee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The present results reported here show that QTL for flower size are correlated with QTL for DNA content”
t0“Silene latifolia”
Claim · model-written summary
The authors interpret the QTL correlation as support that local DNA content variation underlies flower size evolution.
- Taxon
- Silene latifoliaSilene latifoliat0
- Outcome
- evolutionary changes in flower sizee0
- Qualifier
- localized variations in DNA contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“providing additional support for the conclusion that localized variations in DNA content underlie evolutionary changes in flower size.”
t0“Silene latifolia”
Claim · model-written summary
The authors recommend broadening QTL searches to include genome regulation.
- Taxon
- Silene latifoliaSilene latifoliat0
- Outcome
- search image for QTL should be broadened to include overall aspects of genome regulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The search image for QTL should be broadened to include overall aspects of genome regulation.”
t0“Silene latifolia”
Claim · model-written summary
The authors recommend revisiting genotype–phenotype models to encompass genome structure and composition.
- Taxon
- Silene latifoliaSilene latifoliat0
- Outcome
- revisit our overall models of the relationship between genotype and phenotype to encompass aspects of genome structure and composition beyond structural genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“revisit our overall models of the relationship between genotype and phenotype to encompass aspects of genome structure and composition beyond structural genes.”
t0“Silene latifolia”