MAPPING QUANTITATIVE TRAIT LOCI FOR GRAIN YIELD AND YIELD RELATED TRAITS IN A HEXAPLOID WINTER WHEAT DOUBLED HAPLOID POPULATION

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dc.contributor.advisorCosta, Jose Men_US
dc.contributor.authorZhou, Yaopengen_US
dc.contributor.departmentPlant Science and Landscape Architecture (PSLA)en_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2015-09-18T05:55:53Z
dc.date.available2015-09-18T05:55:53Z
dc.date.issued2015en_US
dc.description.abstractImproving wheat grain yield potential is imperative to match the increasing food demand associated with a fast growing population. Genetic and modeling approaches were employed to investigate the genetic basis and phenotype network regarding grain yield and yield related traits in a soft red winter wheat doubled haploid population. The population and two parents were evaluated in five year-location trials in the USA and genotyped by high throughput DNA markers including simple sequence repeat (SSR) and single nucleotide polymorphism (SNP). Bi-parental linkage mapping identified a number of QTLs for grain yield and yield related traits among which sixty were for grain yield components (GYLD, grain yield; SPSM, spikes per square meter; TGW, thousand grain weight; GPS, grains per spike; GWPS, grain weight per spike), seventy four were for plant architecture (PHT, plant height; FLL, flag leaf length; FLW, flag leaf width; FLA, flag leaf area; FLS, flag leaf shape or length/width ratio), and one hundred and nine were for spike morphology (SL, spike length; TSN, total spikelet number per spike; FSN, fertile spikelet number per spike; SSN, sterile spikelet number per spike; SC, spike compactness; GSP, grains per spikelet). In addition, structural equation modeling is described to construct a phenotype network. It revealed that GSP and FSN may mediate yield component compensation. Furthermore, doubled haploid lines DH96 and DH84 may have potential as new high-yielding cultivars for the Mid-Atlantic region.en_US
dc.identifierhttps://doi.org/10.13016/M2264V
dc.identifier.urihttp://hdl.handle.net/1903/17063
dc.language.isoenen_US
dc.subject.pqcontrolledPlant sciencesen_US
dc.subject.pquncontrolledBread wheaten_US
dc.subject.pquncontrolledGrain yielden_US
dc.subject.pquncontrolledPhenotype networken_US
dc.subject.pquncontrolledPlant architectureen_US
dc.subject.pquncontrolledQTL mappingen_US
dc.subject.pquncontrolledSpike characteristicsen_US
dc.titleMAPPING QUANTITATIVE TRAIT LOCI FOR GRAIN YIELD AND YIELD RELATED TRAITS IN A HEXAPLOID WINTER WHEAT DOUBLED HAPLOID POPULATIONen_US
dc.typeDissertationen_US

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