Phenotypic plasticity index
noun phrasePronunciation: /fɪˈnɒtɪpɪk ˈplæstɪsɪti ˈɪndɛks/
A quantitative measure of the magnitude of phenotypic variation expressed by a genotype across different abiotic stress environments, calculated as the ratio of trait range to trait mean. Higher plasticity indices indicate greater environmental responsiveness and adaptive flexibility in growth and development.
Plain English
A numerical score measuring how much a plant's visible traits change in response to different environmental stress conditions.
Etymology & History
Usage
"The phenotypic plasticity index revealed that drought-tolerant cultivars maintained lower trait variation across water deficit scenarios."
Style guide notes: Always specify calculation method and stress conditions when reporting; index values are unitless proportions.
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Contrasted with
Related Terms
Frequently Asked Questions
How is phenotypic plasticity index calculated in field studies?
Index equals trait range divided by trait mean across all stress treatments, reflecting relative trait responsiveness.
What does a high plasticity index indicate for crop breeding?
High plasticity indicates the genotype adapts substantially to environmental changes, useful for variable rainfall regions.
Why Test Candidates on This?
Relevant in advanced quantitative genetics and crop improvement programs focused on environmental adaptation.
Required skill level: Senior