Statistical genetics of an annual plant, Impatiens capensis. I. Genetic basis of quantitative variation.
Analysis of quantitative genetics in natural populations has been hindered by computational and methodological problems in statistical analysis. We developed and validated a jackknife procedure to test for existence of broad sense heritabilities and dominance or maternal effects influencing quantitative characters in Impatiens capensis. Early life cycle characters showed evidence of dominance and/or maternal effects, while later characters exhibited predominantly environmental variation. Monte Carlo simulations demonstrate that these jackknife tests of variance components are extremely robust to heterogeneous error variances. Statistical methods from human genetics provide evidence for either a major locus influencing germination date, or genes that affect phenotypic variability per se. We urge explicit consideration of statistical behavior of estimation and testing procedures for proper biological interpretation of statistical results.
Duke Scholars
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Related Subject Headings
- Plants
- Phenotype
- Monte Carlo Method
- Genetic Variation
- Developmental Biology
- 3105 Genetics
- 3101 Biochemistry and cell biology
- 0604 Genetics
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Plants
- Phenotype
- Monte Carlo Method
- Genetic Variation
- Developmental Biology
- 3105 Genetics
- 3101 Biochemistry and cell biology
- 0604 Genetics