ESPM 108B Lecture 5: ESPM 108B Lecture 5 Quantitative:Phenotypic Traits

• School: Berkeley
• Department: Environmental Science, Policy, And Management
• Course: ESPM 108B
• Professor: Richard Dodd

Document Summary

Quantitative genetics : genetics of complex phenotypes . 1 gene pair has 4 total combos, while 2 gene pairs have 16, etc. Mean and variance of normal distrib used for quantitative traits. Pi = obs mean + gi + ei + e. E = error, g = genetic difference, e = env difference. E and g are dev from mean, for diff sub i they can be +/- Quantitative genetics is concerned with the genetic and environmental effects on phenotypic variance. Heritability : the proportion of variation in a trait that"s due to genotype. Not looking at how much genetics in uence a trait in an individual. Alleles, not genotypes are passed from parents progeny, therefore effects of alleles are what matters (except for clones) Sde: environmental - i. e. plasticity, can remove w/ common garden experiments. Broad-sense heritability : the proportion of var in a trait that can be attributed to total genetic variance.