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dc.contributor.authorKholová, Janaen_US
dc.contributor.authorMurugesan, Tharanyaen_US
dc.contributor.authorKaliamoorthy Sen_US
dc.contributor.authorMalayee Sen_US
dc.contributor.authorBaddam Ren_US
dc.contributor.authorHammer, Graeme L.en_US
dc.contributor.authorMcLean Gen_US
dc.contributor.authorDeshpande, S.en_US
dc.contributor.authorHash, C.T.en_US
dc.contributor.authorCraufurd, Peter Q.en_US
dc.contributor.authorVadez, Vincenten_US
dc.identifier.citationKholová J, Tharanya M, Kaliamoorthy S, Malayee S, Baddam R, Hammer GL, McLean G, Deshpande S, Hash CT, Craufurd PQ, Vadez V. 2014. Modelling the effect of plant water use traits on yield and stay-green expression in sorghum. Functional Plant Biology 41(11):1019–1034.en_US
dc.description.abstractPost-rainy sorghum (Sorghum bicolor (L.) Moench) production underpins the livelihood of millions in the semiarid tropics, where the crop is affected by drought. Drought scenarios have been classified and quantified using crop simulation. In this report, variation in traits that hypothetically contribute to drought adaptation (plant growth dynamics, canopy and root water conducting capacity, drought stress responses) were virtually introgressed into the most common post-rainy sorghum genotype, and the influence of these traits on plant growth, development, and grain and stover yield were simulated across different scenarios. Limited transpiration rates under high vapour pressure deficit had the highest positive effect on production, especially combined with enhanced water extraction capacity at the root level. Variability in leaf development (smaller canopy size, later plant vigour or increased leaf appearance rate) also increased grain yield under severe drought, although it caused a stover yield trade-off under milder stress. Although the leaf development response to soil drying varied, this trait had only a modest benefit on crop production across all stress scenarios. Closer dissection of the model outputs showed that under water limitation, grain yield was largely determined by the amount of water availability after anthesis, and this relationship became closer with stress severity. All traits investigated increased water availability after anthesis and caused a delay in leaf senescence and led to a ‘stay-green’ phenotype. In conclusion, we showed that breeding success remained highly probabilistic; maximum resilience and economic benefits depended on drought frequency. Maximum potential could be explored by specific combinations of traits.en_US
dc.sourceFunctional Plant Biologyen_US
dc.subjectFOOD SECURITYen_US
dc.titleModelling the effect of plant water use traits on yield and stay-green expression in sorghumen_US
dc.typeJournal Articleen_US
cg.identifier.statusUnrestricted Accessen_US
cg.contributor.crpClimate Change, Agriculture and Food Securityen_US

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