Evaluation of Theory for Identifying Populations for Genetic Improvement of Maize Hybrids

dc.contributor.author Pfarr, David
dc.contributor.author Lamkey, Kendall
dc.contributor.author Lamkey, Kendall
dc.contributor.department Agronomy
dc.date 2018-02-19T00:17:04.000
dc.date.accessioned 2020-06-29T23:03:42Z
dc.date.available 2020-06-29T23:03:42Z
dc.date.issued 1992
dc.description.abstract <p>The ability to identify populations with the greatest chance for breeding success may increase the use of unadapted populations by concentration of resources on favorable germplasm. This study was conducted to evaluate the effectiveness of a method (estimates of ')for identifying maize (<em>Zea mays</em> L.) populations with the greatest number of dominant alleles at loci that are homozygous recessive in a single cross. This study also evaluates the effectiveness of a relationship estimator for detecting similarities between a population and the inbreds of a single cross. Estimates of and the relationship estimator were calculated by using donor populations of known composition and relationship to the recipient single cross. Six recipient single crosses were formed from the diallel cross of maize inbreds B73, B79, B77, and Mo17o Donor populations were composed of various proportions of inbreds B79 and B77. Estimates of correctly identified the population expected to have the largest number of unique dominant alleles in three of five single crosses (60%) for grain yield. for ear height, correctly identified the population expected to have the largest number of unique dominant alleles in four or five single crosses (80%). Estimates of did not identify populations expected to contain dominant alleles for earlier silking, suggesting that additive gene action or epistasis were important for siiking date. The relationship estimator for yield correctly identified the known relationship between the populations and the inbred parents of the single crosses. The successful application of to exotic populations is uncertain because of a low frequency of favorable dominant alleles contained by exotics for important economic traits.</p>
dc.description.comments <p>This article is published as Pfarr, David G., and Kendall R. Lamkey. "Evaluation of theory for identifying populations for genetic improvement of maize hybrids." Crop science 32, no. 3 (1992): 663-669. doi: <a href="http://dx.doi.org/10.2135/cropsci1992.0011183X003200030017x" target="_blank" title="Evaluation of Theory for Identifying Populations for Genetic Improvement of Maize Hybrids">10.2135/cropsci1992.0011183X003200030017x</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/agron_pubs/246/
dc.identifier.articleid 1249
dc.identifier.contextkey 10944936
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/246
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/4584
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_pubs/246/1992_Lamkey_EvaluationTheory.pdf|||Fri Jan 14 22:54:13 UTC 2022
dc.source.uri 10.2135/cropsci1992.0011183X003200030017x
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Plant Breeding and Genetics
dc.title Evaluation of Theory for Identifying Populations for Genetic Improvement of Maize Hybrids
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication fadecd27-89f7-4164-8981-ce39d1a066e1
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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