QTL analysis of root architecture traits and low phosphorus tolerance in an andean bean population

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dc.creatorCichy, Karen Ann
dc.creatorBlair, Matthew W.
dc.creatorGaleano Mendoza, CH
dc.creatorSnapp, Sieglinde S.
dc.creatorKelly, James D.
dc.date2009-01
dc.date2014-09-24T08:41:35Z
dc.date2014-09-24T08:41:35Z
dc.date.accessioned2026-06-27T14:41:00Z
dc.descriptionTolerance to low P soils is a desirable trait in common bean (Phaseolus vulgaris L.) cultivars grown in acid-weathered soils. Genetic variability in response to P-deficient soils exists in the Andean gene pool. G19833, a low P–tolerant indeterminate Andean landrace, has been evaluated for quantitative trait loci (QTL) and tolerance to low P in combination with Mesoamerican parents. Our goal was to expand our understanding of phenotypic traits and QTL from G19833 expressed in an Andean background. An F5:7 recombinant inbred line (RIL) population developed from two Andean bean genotypes, G19833 and AND696, a determinate line susceptible to low P soils, was examined under low and high soil P levels in replicated field trials. Phosphorus uptake was reduced by 70% and yield by 60% in low P compared to high P treatments. A linkage map was developed with 11 linkage groups and a total length of 1105 cM. Quantitative trait loci for root growth, seed yield, seed P content, and P use efficiency colocalized near the fin gene on linkage group B1. Quantitative trait loci for root growth traits, seed yield, and P uptake colocalized on B11. Quantitative trait loci for root length density (cm cm?3) and root surface area (cm2) did not colocalize with QTL for P uptake. This study indicates that root traits did not play an important role in tolerance to low P soil in an Andean × Andean cross, contrary to previous results with the same P-efficient Andean parent (G19833) crossed to a Mesoamerican bean genotype.
dc.identifierhttps://hdl.handle.net/10568/43073
dc.identifier.urihttp://hdl.handle.net/123456789/85337
dc.languageen
dc.publisherWiley
dc.rightsLimited Access
dc.sourceCichy, KA, Blair, MW, Galeano Mendoza, CH, Snapp, SS, Kelly, JD. QTL Analysis of Root Architecture Traits and Low Phosphorus Tolerance in an Andean Bean Population Crop Sci. 2009. 49:59–68.
dc.subjectphaseolus vulgaris
dc.subjectquantitative trait loci
dc.subjectgenetic markers
dc.subjectphosphorus
dc.subjectmineral deficiencies
dc.subjectplant habit
dc.subjectroots
dc.subjectandean group
dc.subjectloci de rasgos cuantitativos
dc.subjectmarcadores genéticos
dc.subjectfósforo
dc.subjectdeficiencia de minerales
dc.subjecthábito de la planta
dc.subjectraíces
dc.subjectregion andina
dc.titleQTL analysis of root architecture traits and low phosphorus tolerance in an andean bean population
dc.typeJournal Article

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Centro Internacional de Agricultura Tropical (CIAT)