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Genetic analysis of water use efficiency in rice (Oryza sativa L.) at the leaf level

Author: This, D.
Author: Comstock, J.
Author: Courtois, B.
Author: Yunbi Xu
Author: Ahmadi, N.
Author: Vonhof, W.M.
Author: Fleet, C.
Author: Setter, T.L.
Author: McCouch, S.
Year: 2010
ISSN: 1939-8425
URI: http://hdl.handle.net/10883/1843
Abstract: Carbon isotope discrimination (∆13C) is considered as an index of leaf-level water use efficiency, an important objective for plant breeders seeking to conserve water resources. We report in rice a genetic analysis for ∆13C, leaf structural parameters, gas exchange, stomatal conductance, and leaf abscisic acid (ABA) concentrations. Doubled haploid and recombinant inbred populations, both derived from the cross IR64 × Azucena, were used for quantitative trait locus (QTL) analysis following greenhouse experiments. ∆13C QTLs on the long arms of chromosomes 4 and 5 were colocalized with QTLs associated with leaf blade width, length, and flatness, while a QTL cluster for ∆13C, photosynthesis parameters, and ABA was observed in the near-centromeric region of chromosome 4. These results are consistent with phenotypic correlations and suggest that genetic variation in carbon assimilation and stomatal conductance contribute to the genetic variation for ∆13C in this population.
Format: PDF
Language: English
Publisher: Springer Nature
Type: Article
Region: Global
Pages: 72-86
Issue: 1
Volume: 3
DOI: 10.1007/s12284-010-9036-9
Keywords: Carbon Isotope Discrimination
Agrovoc: WATER USE EFFICIENCY
Agrovoc: CARBON 13
Agrovoc: ISOTOPE ANALYSIS
Agrovoc: ORYZA SATIVA
Journal: Rice


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  • Genetic Resources
    Genetic Resources including germplasm collections, wild relatives, genotyping, genomics, and IP

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