Leaf gas exchange and yield of three upland rice cultivars.

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dc.contributorRITA DE CÁSSIA FELIX ALVAREZ, UFMS; GUSTAVO HABERMANN, UNESP; CARLOS ALEXANDRE COSTA CRUSCIOL, UNESP; ADRIANO STEPHAN NASCENTE, CNPAF; JOÃO DOMINGOS RODRIGUES, UNESP.
dc.creatorALVAREZ, R. de C. F.
dc.creatorHABERMANN, G.
dc.creatorCRUSCIOL, C. A. C.
dc.creatorNASCENTE, A. S.
dc.creatorRODRIGUES, J. D.
dc.date2015-06-08T11:11:11Z
dc.date2015-06-08T11:11:11Z
dc.date2015-06-08
dc.date2015
dc.date2015-06-08T11:11:11Z
dc.date.accessioned2026-07-01T00:01:20Z
dc.descriptionStudies of physiological parameters associated with crop performance and growth in different groups of upland rice (Oryza sativa L.) may support plant breeding programs. We evaluated the role of gas exchange rates and dry matter accumulation (DMA) as traits responsible for yields in a traditional (cv. 'Caiapó'), intermediate (cv. 'Primavera') and modern (cv. 'Maravilha') upland rice cultivars. Leaf gas exchange rates, DMA, leaf area index (LAI), harvest indexes (HI) and yield components were measured on these genotypes in the field, under sprinkler irrigation. Panicles per m2 and DMA at flowering (FL) and heading, as well as CO2 assimilation rates (A) were similar across these cultivars. The highest yield was found in ?Primavera?, which may be explained by (i) a two-fold higher HI compared to the other cultivars, (ii) greater rates of DMA during spikelet formation and grain-filling, as well as (iii) a slow natural decrease of A in this cultivar, at the end of the season (between FL and maturation).
dc.identifierBragantia, Campinas, v. 74, n. 1, p. 1-8, jan./mar. 2015.
dc.identifier1678-4499
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1017076
dc.identifier10.1590/1678-4499.0322
dc.identifier.urihttp://hdl.handle.net/123456789/395629
dc.languageeng
dc.rightsopenAccess
dc.subjectÍndice de colheita
dc.subjectIntercâmbio de gases
dc.subjectArroz
dc.subjectOryza sativa
dc.subjectGas
dc.subjectFisiologia
dc.subjectHarvest index
dc.subjectGas exchange
dc.subjectRice
dc.titleLeaf gas exchange and yield of three upland rice cultivars.
dc.typeArtigo de periódico

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