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pubmed-article:11901131pubmed:abstractTextFlow cytometry was used to assess the variability of endoreduplication in endosperms of maize inbred lines. Little variation was found between midwestern dent types, and high levels of endoreduplication were observed in popcorns. Endoreduplication is different between inbred lines by 13-18 days after pollination, and flow cytometric analysis of ploidy level was feasible until 20 DAP. To study the genetic regulation of endoreduplication, four inbreds were crossed to B73 and developing endosperms from both parental, reciprocal F(1), and backcross generations were subjected to flow cytometric analysis. Three measurements of endoreduplication were calculated from these data and analyzed as quantitative genetic traits. Multiple models of trait inheritance were considered including triploid, diploid, sporophytic maternal, and maternal and paternal zygotic nuclear inheritance. Maternal zygotic effects, often considered a form of parental imprinting, and maternal sporophytic effects were detected. To test the feasibility of introgressing a high endoreduplication phenotype into a midwestern dent inbred line, a backcross population was generated from B73 x Sg18. Parental and progeny endoreduplication levels were compared and heritabilities assessed. The heritabilities calculated from these data generally agree with the values calculated in the larger crossing experiments.lld:pubmed
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pubmed-article:11901131pubmed:authorpubmed-author:DilkesBrian...lld:pubmed
pubmed-article:11901131pubmed:authorpubmed-author:DanteRicardo...lld:pubmed
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pubmed-article:11901131pubmed:authorpubmed-author:LarkinsBrian...lld:pubmed
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pubmed-article:11901131pubmed:volume160lld:pubmed
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pubmed-article:11901131pubmed:pagination1163-77lld:pubmed
pubmed-article:11901131pubmed:dateRevised2010-9-14lld:pubmed
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pubmed-article:11901131pubmed:articleTitleGenetic analyses of endoreduplication in Zea mays endosperm: evidence of sporophytic and zygotic maternal control.lld:pubmed
pubmed-article:11901131pubmed:affiliationDepartment of Plant Sciences, University of Arizona, Tucson, Arizona 85721, USA.lld:pubmed
pubmed-article:11901131pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:11901131pubmed:publicationTypeResearch Support, U.S. Gov't, Non-P.H.S.lld:pubmed
pubmed-article:11901131pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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