Genetic analyses of endoreduplication in Zea mays endosperm: evidence of sporophytic and zygotic maternal control.

Genetics
Brian P DilkesBrian A Larkins

Abstract

Flow 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 heritabiliti...Continue Reading

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Citations

Oct 4, 2007·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Cintia M CoelhoBrian A Larkins
Jun 3, 2006·Chromosoma·Matthew J Bauer, James A Birchler
Mar 27, 2007·Plant Methods·Beth A RowanArnold J Bendich
Mar 19, 2008·Theoretical Biology & Medical Modelling·Yuehua CuiGengxin Li
Aug 12, 2014·American Journal of Botany·Brian M LerouxJoanne M Dannenhoffer
Feb 25, 2005·Bioinformatics·Yuehua Cui, Rongling Wu
Mar 2, 2005·Cytometry. Part a : the Journal of the International Society for Analytical Cytology·Elwira SliwinskaIwona Jedrzejczyk
Dec 21, 2002·The Plant Journal : for Cell and Molecular Biology·Olivier LeblancMartha Hernandez
Jan 8, 2009·Plant Physiology·Paolo A Sabelli, Brian A Larkins
Jun 24, 2009·Trends in Plant Science·Xuefeng WangBrian A Larkins
Dec 25, 2009·Sexual Plant Reproduction·Paolo A Sabelli, Brian A Larkins
Sep 20, 2011·Planta·Mukhamad Su'udiDaeyoung Son

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