HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Dudley, J. W. Search for Related Content PubMed Articles by Dudley, J. W. Agricola Articles by Dudley, J. W.

A Method for Identifying Populations Containing Favorabel Alleles Not Present in Elite Germplasm¹

Often, particularly in breeding programs attempting to use exotic germplasm to improve quantitative traits, the breeder needs to know which of several populations carry favorable alleles that are not present in elite germplasm. This knowledge would allow concentration of breeding efforts on a few populations where the probability of successful improvement of existing germplasm is relatively high. To provide this information, a method for identifying populations carrying favorable dominant alleles, not present in an elite single cross, is developed. In its simplest form, the method requires evaluation of the elite single cross, its inbred parents, and crosses of the populations to be evaluated to the two parents of the single cross. If the elite single cross is designated P₁ x P, and the populations to be tested P_y, the expression lµ = {[(P₁ x P_y)• P₁][(P₁ x P₂) - P₂] - [(P₂ x P_y - P₂][P₁ x P₂) - P₁]}/2(P₁ - P₂) is an estimate of the product of the relative number of loci (lµ) not containing at least one favorable allele in P₁ x P₂ and the average frequency of favorable alleles (₁) at such loci in P_y. The method may be particularly useful for identifying populations of exotic germplasm which contain useful new alleles.

Key Words: Quantitative genetics • Exotic germplasm • Corn breeding

² Professor of plant genetics, Agronomy Dep., Univ. of Illinois, 1102 S. Goodwin Ave., Urbana, IL 61801.

Received for publication February 10, 1984.

This article has been cited by other articles:

				S. Tang, A. Leon, W. C. Bridges, and S. J. Knapp Quantitative Trait Loci for Genetically Correlated Seed Traits are Tightly Linked to Branching and Pericarp Pigment Loci in Sunflower Crop Sci., February 24, 2006; 46(2): 721 - 734. [Abstract] [Full Text] [PDF]

				J. M. Taller and R. Bernardo Diverse Adapted Populations for Improving Northern Maize Inbreds Crop Sci., July 1, 2004; 44(4): 1444 - 1449. [Abstract] [Full Text] [PDF]

				S. Trifunovic, I. Husic, M. Rosulj, and R. Stojsin Evaluation of U.S. and Yugoslavian Maize Populations as Sources of Favorable Alleles Crop Sci., March 1, 2001; 41(2): 302 - 308. [Abstract] [Full Text] [PDF]