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| genetic analysis of complex characteristics |
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limited number of phenotypes but still quantitative
ex: litter size |
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simply present or not present.
ex: presence of some diseases |
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when the continuous distribution of phenotypes is a result of incremental contributions by multiple genes
2n+1= # of phenotypesfre |
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| a graph of the frequencies of the different phenotypes |
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| a measure of the spread of distribution around the mean |
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| the proportion of the total phenotypic variation that is due to genetic differences |
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| the variance of the sample of plants from the population= Vp |
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| VG= variance that may be due to differences in genotypes among individual members of the population |
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| VE= variance due to environmental difference |
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| genetic- environmental interaction variance |
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| VGE= arises when the effect of a gene depends on the specific environement in which it is found |
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| additive genetic variance |
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Definition
| VA= comprises the additive effects of genes on the phenotype |
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Definition
| VD= results from the dominance relationships in which heterozygous individuals are not intermediate between the two homozygous states |
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