lecture_notes_11_7_07 - Inheritance of Complex Traits...

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Inheritance of Complex Traits, outline 2007 Inheritance of Complex Traits [Reading: SS 709-715, CR 262-264] Continuous variation : Trait expression varies continuously rather than discretely Usually the result of incomplete dominance, multiple genes (polygenic trait), or environment Example: kernel color of wheat conditioned by 2 or 3 genes with additive genetic effects (genetic factors that raise or lower phenotypic values on a linear scale) Trends: Multiple genes with incomplete dominance for traits conditioned by 1, 2, 3, 5, 10 genes with equal effect result in more continuous variation Quantitative traits Continuous variation is a characteristic of quantitative traits (traits which reflect the incremental measurable effects of multiple genes or environment) Evaluation of progeny phenotypes and magnitude of variation in F 1 , F 2 , F 3 or testcross generations (progeny testing) helps characterize inheritance pattern Examples: Corolla length in tobacco Time to maturity in wheat
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This note was uploaded on 04/29/2008 for the course BIOCORE 301 taught by Professor Howell during the Fall '07 term at University of Wisconsin.

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lecture_notes_11_7_07 - Inheritance of Complex Traits...

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