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dc.contributorEl Bouhssini, Mustaphaen_US
dc.contributorTan, Mui-Kengen_US
dc.contributorOgbonnaya, Francis Chuksen_US
dc.creatorEmebiri, Livinus C.en_US
dc.identifier.citationLivinus C. Emebiri, Mustapha El Bouhssini, Mui-Keng Tan, Francis Chuks Ogbonnaya. (25/2/2017). Field-based screening identifies resistance to Sunn pest (Eurygaster integriceps) feeding at vegetative stage in elite wheat genotypes. Crop and Pasture Science, 68 (2), pp. 126-133.en_US
dc.description.abstractSunn pest (Eurygaster integriceps Puton) is currently widely distributed in West and Central Asia and Eastern Europe, but has not been found in Australia, Western Europe or North America. Climate warming is known to promote the expansion of its range of distribution, and it is expected that the insect could spread into new territories. Varieties of wheat (Triticum aestivum) carrying resistance remain an important component of managing the biosecurity risk of any potential incursion. Previous studies have identified sources of Sunn pest resistance in wheat, but there is little information on the genes that confer the resistance. This research used field-based, artificial infestation cages to evaluate 204 elite wheat varieties for Sunn pest resistance, at Terbol, Lebanon. A significant (P < 0.001) difference in resistance was observed among the wheat germplasm, with 19 varieties rated as resistant to moderately resistant and 17 as highly susceptible. Three of the elite varieties showed very little damage, a status similar to that of the resistant check, ICBW-209273. In parallel, the research carried out a genome-wide scan with single-nucleotide polymorphism (SNP) markers to identify chromosome regions and putative genes associated with resistance. Association mapping identified SNP markers with significant associations on chromosomes 2D, 4B and 5B. When these markers were projected onto the wheat population sequencing-based (POPSEQ) reference map, they tended to map close to the location of wheat height-reducing genes. The phenotypic variation explained by the identified markers ranged from 7% to 11%, and collectively, they explained 23.9% of the variation or 45% of the generalised heritability. Marker-trait association was confirmed in two independent, doubled-haploid wheat populations, derived from crosses involving wheat landraces from Afghanistan, where Sunn pest is recognised as an endemic problem. In the two wheat populations, the analyses validated the strong association between wsnp_BF483640B_Ta_2_2 and resistance to Sunn pest damage at the vegetative stage. This study demonstrates existence of genetic resistance toSunn pest feeding at the vegetative stage in elite wheat germplasm. The study also identified and validated SNP markers that could be useful tools for transfer of resistance into new wheat cultivars.en_US
dc.publisherCSIRO Publishingen_US
dc.sourceCrop and Pasture Science;68,(2017) Pagination 126,133en_US
dc.subjectgenome-wide association study (gwas)en_US
dc.subjectpre-emptive breedingen_US
dc.subjectreduced-height genes (rht)en_US
dc.titleField-based screening identifies resistance to Sunn pest (Eurygaster integriceps) feeding at vegetative stage in elite wheat genotypesen_US
dc.typeJournal Articleen_US
cg.creator.idEl Bouhssini, Mustapha: 0000-0001-8945-3126en_US
cg.subject.agrovocgenetic resistanceen_US
cg.contributor.centerCharles Sturt University - CSUen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerNSW Department of Primary Industries - NSW-DPIen_US
cg.contributor.centerGrains Research and Development Corporation - GRDCen_US
cg.contributor.crpCRP on Wheat - WHEATen_US
cg.contributor.funderInternational Maize and Wheat Improvement Center - CIMMYTen_US
cg.contributor.projectManaging on-farm Biosecurity risk in wheat through pre-emptive breedingen_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
dc.identifier.statusOpen accessen_US

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