Identification of Soil Moisture Deficits Influencing Genotype-by-Environment Interactions In Maize (ZEA MAYS L.)

dc.contributor.advisorLee, Elizabeth
dc.contributor.authorHooyer, Mathew
dc.date.accessioned2012-11-27T18:45:54Z
dc.date.available2012-11-27T18:45:54Z
dc.date.copyright2012-12
dc.date.created2012-06-12
dc.date.issued2012-11-27
dc.degree.departmentDepartment of Plant Agricultureen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.degree.programmePlant Agricultureen_US
dc.description.abstractMaize grain yield is often highly influenced by the genotype-by-environment (GxE) interactions which limit plant breeders’ ability to select for superior performance as variation in line performance exists across different environments. While studies have focused on the genetic components underlining GxE interactions, few have investigated the environmental components. The focus of this thesis was to investigate the role that soil moisture stress plays in the formation of GxE patterns using a unique set of hybrid recombinant inbred lines (RIL) that exhibit minimal phenological differences. With the use of environmental groups (EG, environments with similar GxE patterns), the field trials demonstrated that different EGs form when relative soil moisture stress is moderate to high; however, relative low soil moisture stress did not appear to influence the formation of GxE patterns. Seasonal corn heat unit (CHU) accumulation among EGs was the likely cause for EG differentiation among the low moisture stress EGs. It appears that CHUs were the primary cause of different GxE patterns forming when they did not exceed the recommended CHU for a population and when CHU differed greatly from one environment to another. When CHU were not limiting different GxE patterns formed based on the relatively moderate to high soil moisture stress conditions within the growing season.en_US
dc.description.sponsorshipOntario Research Fund
dc.description.sponsorshipNational Science and Engineering Research Council
dc.description.sponsorshipand The Ontario Ministry of Agriculture, Food and Rural Affairs
dc.identifier.urihttp://hdl.handle.net/10214/4669
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectGxEen_US
dc.subjectMaizeen_US
dc.subjectSoil Moistureen_US
dc.subjectCHUen_US
dc.subjectMaize Developmenten_US
dc.titleIdentification of Soil Moisture Deficits Influencing Genotype-by-Environment Interactions In Maize (ZEA MAYS L.)en_US
dc.typeThesisen_US

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