Phenotypic Characterization of Quality Protein Maize Endosperm Modification and Amino Acid Contents in a Segregating Recombinant Inbred Population Gutierrez-Rojas, Andres Scott, M. Paul Scott, Marvin Leyva, Otto Menz, Monica Betrán, Javier
dc.contributor.department Agronomy 2018-02-18T15:44:00.000 2020-06-29T23:03:04Z 2020-06-29T23:03:04Z 2008-09-01
dc.description.abstract <p>The protein quality of maize (<em>Zea mays</em> L.) can be improved by replacing normal <em>Opaque2</em>alleles with nonfunctional recessive alleles (<em>o2</em>). Homozygous <em>o2</em> kernels have increased levels of lysine and tryptophan. Unfortunately, the associated soft texture of the <em>o2</em> kernels causes poor yield and susceptibility to diseases and insects. Breeding has resulted in the development of <em>o2</em> genotypes with improved endosperm hardness; such genotypes are referred to as quality protein maize (QPM). Quality protein maize germplasm is utilized in breeding programs worldwide and has been competitive in yield trials. To understand the genetics of endosperm modification, a population of 146 recombinant inbred lines (S<sub>5</sub> to S<sub>7</sub>) derived from a cross between the <em>o2</em> inbred B73<em>o2</em> and the QPM inbred CML161 was evaluated in two Texas locations from 2004 to 2006. The endosperm traits texture, opacity, and vitreousness were highly affected by inbred line genotype, were highly correlated with each other, and exhibited high broad-sense heritability. Relative content of the essential amino acids lysine, tryptophan, and methionine were also highly affected by the inbred line genotype, and exhibited high broad-sense heritability. Negative correlation was observed between endosperm texture traits and amino acid contents. Favorable responses to selection can be expected for both endosperm texture modification and relative content of the essential amino acids if they are efficiently monitored.</p>
dc.description.comments <p>This article is published as Gutierrez-Rojas, Andres, M. Paul Scott, Otto R. Leyva, Monica Menz, and Javier Betrán. "Phenotypic characterization of quality protein maize endosperm modification and amino acid contents in a segregating recombinant inbred population." <em>Crop science</em> 48, no. 5 (2008): 1714-1722, doi: <a href="" target="_blank">10.2135/cropsci2007.08.0429</a>.</p>
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dc.identifier archive/
dc.identifier.articleid 1178
dc.identifier.contextkey 10442504
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/166
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 21:02:53 UTC 2022
dc.source.uri 10.2135/cropsci2007.08.0429
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Plant Breeding and Genetics
dc.title Phenotypic Characterization of Quality Protein Maize Endosperm Modification and Amino Acid Contents in a Segregating Recombinant Inbred Population
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 97acee5f-1291-4c27-8929-a8e1617c411d
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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