Person: Pariyar, S.R.
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Pariyar
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S.R.
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Pariyar, S.R.
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- Influence of thiabendazole seed treatment on the integrated control of Heterodera filipjevi on six wheat genotypes with different levels of genetic resistance under controlled conditions(Organization of Nematologists of Tropical America, 2014) Dababat, A.A.; Pariyar, S.R.; Nicol, J.M.; Erginbas Orakci, G.; Goll, M.; Watrin, C.; Duveiller, E.; Braun, H.J.; Cabrera, J.A.; Sikora, R.A.
Publication - Dissecting the genetic complexity of Fusarium crown rot resistance in wheat(Nature Publishing Group, 2020) Pariyar, S.R.; Erginbas Orakci, G.; Dadshani, S.; Chijioke, O.B.; Leon, J.; Dababat, A.A.; Grundler, F.
Publication - Genome-wide association study in wheat identifies resistance to the cereal cyst nematode Heterodera Filipjevi(American Phytopathological Society (APS), 2016) Pariyar, S.R.; Dababat, A.A.; Sannemann, W.; Erginbas Orakci, G.; Elashry, A.; Siddique, S.; Morgounov, A.; Leon, J.; Grundler, F.The cyst nematode Heterodera filipjevi is a plant parasite causing substantial yield loss in wheat. Resistant cultivars are the preferred method of controlling cyst nematodes. Association mapping is a powerful approach to detect associations between phenotypic variation and genetic polymorphisms; in this way favorable traits such as resistance to pathogens can be located. Therefore, a genome-wide association study of 161 winter wheat accessions was performed with a 90K iSelect single nucleotide polymorphism (SNP) chip. Population structure analysis grouped into two major subgroups and first principal component accounted 6.16% for phenotypic diversity. The genome-wide linkage disequilibrium across wheat was 3 cM. Eleven quantitative trait loci (QTLs) on chromosomes 1AL, 2AS, 2BL, 3AL, 3BL, 4AS, 4AL, 5BL, and 7BL were identified using a mixed linear model false discovery rate of P < 0.01 that explained 43% of total genetic variation. This is the first report of QTLs conferring resistance to H. filipjevi in wheat. Eight QTLs on chromosomes 1AL, 2AS, 2BL, 3AL, 4AL, and 5BL were linked to putative genes known to be involved in plant−pathogen interactions. Two other QTLs on 3BL and one QTL on 7BL linked to putative genes known to be involved in abiotic stress.
Publication - Identification of novel quantitative trait loci linked to crown rot resistance in spring wheat(MDPI, 2018) Erginbas Orakci, G.; Sehgal, D.; Sohail, Q.; Ogbonnaya, F.C.; Dreisigacker, S.; Pariyar, S.R.; Dababat, A.A.Crown rot (CR), caused by various Fusarium species, is a major disease in many cereal-growing regions worldwide. Fusarium culmorum is one of the most important species, which can cause significant yield losses in wheat. A set of 126 advanced International Maize and Wheat Improvement Center (CIMMYT) spring bread wheat lines were phenotyped against CR for field crown, greenhouse crown and stem, and growth room crown resistance scores. Of these, 107 lines were genotyped using Diversity Array Technology (DArT) markers to identify quantitative trait loci linked to CR resistance by genome-wide association study. Results of the population structure analysis grouped the accessions into three sub-groups. Genome wide linkage disequilibrium was large and declined on average within 20 cM (centi-Morgan) in the panel. General linear model (GLM), mixed linear model (MLM), and naïve models were tested for each CR score and the best model was selected based on quarantine-quarantine plots. Three marker-trait associations (MTAs) were identified linked to CR resistance; two of these on chromosome 3B were associated with field crown scores, each explaining 11.4% of the phenotypic variation and the third MTA on chromosome 2D was associated with greenhouse stem score and explained 11.6% of the phenotypic variation. Together, these newly identified loci provide opportunity for wheat breeders to exploit in enhancing CR resistance via marker-assisted selection or deployment in genomic selection in wheat breeding programs.
Publication - Cereal Cyst Nematodes: an unnoticed threat to global cereal production(CGIAR, 2011) Dababat, A.A.; Pariyar, S.R.; Nicol, J.M.; Duveiller, E.Nematodes are among the earliest recognized parasites of wheat that occur worldwide in nearly all environments. A loss of 10% of world crop production has been estimated as a result of plant nematode damage (Whitehead 1998). The cereal cyst nematodes (CCN
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