Differential responses of grain yield, grain protein content and their associated traits to nitrogen supply in soft red winter wheat

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dc.contributor.authorTamang, Bishal Goleen
dc.contributor.authorBrasier, Kyle G.en
dc.contributor.authorThomason, Wade E.en
dc.contributor.authorGriffey, Carl A.en
dc.contributor.authorFukao, Takeshien
dc.contributor.departmentFralin Life Sciences Instituteen
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.date.accessioned2017-09-19T13:50:24Zen
dc.date.available2017-09-19T13:50:24Zen
dc.date.issued2017en
dc.description.abstractIncreased application of nitrogen fertilizers has significantly raised grain yield and protein concentration in wheat. However, only 30–50% of applied fertilizer nitrogen are usually utilized by the plant. In this study, four soft red winter wheat genotypes (Triticum aestivum L., IL07-4415, MD05W10208-11-8, OH06-150-57 and Sisson) were grown under three different nitrogen regimes (high, medium, and low) in a greenhouse, and grain yield, grain protein concentration, nitrogen use efficiency (NUE) and their associated traits were evaluated. Among the four genotypes, a high-yielding cultivar, Sisson, exhibited superior performance in terms of grain weight plant–1 and NUE for yield (NUEY) at low nitrogen due to maintained grain number spike–1 and harvest index. Significant yield losses due to nitrogen limitation were attributable to reduced spike number plant–1 and grain number spike–1 in the other genotypes. Interestingly, a linear relationship between NUEY and NUE for grain protein (NUEP) was detected at high (R2 = 0.67) and low (R2 = 0.42) nitrogen; both of these traits were positively correlated with grain number spike–1, 1000-seed weight, and harvest index under nitrogen-limited conditions (R2 = 0.35–0.48). These results suggest that simultaneous improvement of NUEY and NUEP could be achieved through the selection of the three yield components (grain number spike–1, 1000-seed weight, and harvest index) at low nitrogen.en
dc.description.versionSubmitted versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.orcidThomason [0000-0003-2498-1010]en
dc.identifier.orcidFukao, T [0000-0002-9930-1318]en
dc.identifier.urihttp://hdl.handle.net/10919/79134en
dc.language.isoenen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.titleDifferential responses of grain yield, grain protein content and their associated traits to nitrogen supply in soft red winter wheaten
dc.title.serialJournal of Plant nutrition and Soil Scienceen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciencesen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/CALS T&R Facultyen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/Crop & Soil Environmental Scienceen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/University Research Institutesen
pubs.organisational-group/Virginia Tech/University Research Institutes/Fralin Life Sciencesen
pubs.organisational-group/Virginia Tech/University Research Institutes/Fralin Life Sciences/Fralin Affiliated Facultyen

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