Recurrent Selection to Alter Grain Methionine Concentration and Improve Nutritional Value of Maize

dc.contributor.author Scott, Marvin
dc.contributor.author Scott, M. Paul
dc.contributor.author Darrigues, Audrey
dc.contributor.author Stahly, Timothy
dc.contributor.author Lamkey, Kendall
dc.contributor.author Lamkey, Kendall
dc.contributor.department Agronomy
dc.date 2018-02-16T07:43:45.000
dc.date.accessioned 2020-06-29T23:05:14Z
dc.date.available 2020-06-29T23:05:14Z
dc.date.issued 2008-09-01
dc.description.abstract <p>Methionine is an essential amino acid that is limiting in maize- (<em>Zea mays</em> L.) based diets. The objective of this work was to determine whether we could alter grain methionine concentration in random-mated maize populations by mass selection for methionine concentration using a microbial assay. In one study, we developed two populations by selecting for high or low methionine concentration (HM or LM, respectively) for three generations starting from the random-mated population BS11. Grain from these populations was used to formulate diets for a feeding trial in which 15 rats were fed HM grain and 15 rats were fed LM grain. Rats on the HM diet had a 0.018 higher feed efficiency (g gain/g feed) than rats on the LM diet. In a second study, we performed three cycles of selection for high or low methionine concentration starting with two random-mated populations, BS11 and BS31. We evaluated each cycle of selection in a field trial with two replications in each of two years. Methionine concentration was significantly correlated with the cycle of selection, changing on average 0.004 g methionine/100 g grain per cycle. Kernel mass, %N, oil, protein, starch, tryptophan, and lysine concentration did not exhibit significant correlations with cycle of selection. We conclude that recurrent selection for grain methionine concentration using a microbial assay is an effective method to alter methionine content.</p>
dc.description.comments <p>This article is from <em>Crop Science</em> 48 (2008): 1705–1713, doi:<a href="http://dx.doi.org/10.2135/cropsci2008.01.0010" target="_blank">10.2135/cropsci2008.01.0010</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/agron_pubs/44/
dc.identifier.articleid 1040
dc.identifier.contextkey 7031687
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/44
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/4798
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_pubs/44/2008_Scott_RecurrentSelection.pdf|||Sat Jan 15 00:17:23 UTC 2022
dc.source.uri 10.2135/cropsci2008.01.0010
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Genetics
dc.subject.disciplines Plant Breeding and Genetics
dc.title Recurrent Selection to Alter Grain Methionine Concentration and Improve Nutritional Value of Maize
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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