Agronomy and Horticulture, Department of

 

Quantitative Traits

Document Type

Learning Object

Date of this Version

2005

Citation

Plant and Soil Sciences eLibrary (PASSeL) Lesson

Comments

Copyright © 2005 Don Lee. Used by permission.

This project was supported in part by the National Research Initiative Competitive Grants CAP project 2011-68002-30029 from the USDA National Institute of Food and Agriculture, administered by the University of California-Davis and by the National Science Foundation (NSF), Division of Undergraduate Education, National SMETE Digital Library Program, Award #0938034, administered by the University of Nebraska. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author and do not necessarily reflect the views of the USDA or NSF.

Development of this lesson was supported in part by Cooperative State Research, Education, & Extension Service, U.S. Dept. of Agriculture under Agreement Number 98-EATP-1-0403 administered by Cornell University and the American Distance Education Consortium (ADEC). Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author and do not necessarily reflect the view of the U.S. Department of Agriculture.

Abstract

Examines quantitative versus qualitative traits, looking at the use of phenotypes in determining quantitative control of heritability.

Objectives

  1. Define a quantitative trait and contrast with qualitative traits.
  2. Recognize when a trait is quantitatively controlled by analyzing the distribution of phenotypes observed or measured in the F2.
  3. Describe the reasons for the distribution of phenotypes observed for a quantitative trait.
  4. Define what is meant by broad sense heritability and explain how it can be used in breeding programs.

Modules:

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