Shoot and Root Traits Contribute to Drought Resistance in Recombinant Inbred Lines of MD 23–24 × SEA 5 of Common Bean

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dc.creatorPolanía Perdomo, José A.
dc.creatorRao, Idupulapati M.
dc.creatorCajiao V., César Hernando
dc.creatorGrajales Bedoya, Miguel Angel
dc.creatorRivera Peña, Mariela
dc.creatorVelásquez, Federico
dc.creatorRaatz, Bodo
dc.creatorBeebe, Stephen E.
dc.date2017-03-03
dc.date2017-03-07T21:01:53Z
dc.date2017-03-07T21:01:53Z
dc.date.accessioned2026-06-27T14:42:37Z
dc.descriptionDrought is the major abiotic stress factor limiting yield of common bean (Phaseolus vulgaris L.) in smallholder systems in Latin America and eastern and southern Africa; where it is a main source of protein in the daily diet. Identification of shoot and root traits associated with drought resistance contributes to improving the process of designing bean genotypes adapted to drought. Field and greenhouse studies were conducted at the International Center for Tropical Agriculture (CIAT), Palmira, Colombia to determine the relationship between grain yield and different shoot and root traits using a recombinant inbred lines (RILs) population (MD23–24 × SEA 5) of common bean. The main objectives of this study were to identify: (i) specific shoot and root morpho-physiological traits that contribute to improved resistance to drought and that could be useful as selection criteria in breeding beans for drought resistance; and (ii) superior genotypes with desirable shoot and root traits that could serve as parents in breeding programs that are aimed at improving drought resistance. A set of 121 bean genotypes (111 RILs, 2 parents, 8 checks) belonging to the Mesoamerican gene pool and one cowpea variety were evaluated under field conditions with two levels of water supply (irrigated and rainfed) over three seasons. To complement field studies, a greenhouse study was conducted using plastic cylinders with soil inserted into PVC pipes, to determine the relationship between grain yield obtained under field conditions with different root traits measured under greenhouse conditions. Resistance to drought stress was positively associated with a deeper and vigorous root system, better shoot growth, and superior mobilization of photosynthates to pod and seed production. The drought resistant lines differed in their root characteristics, some of them with a vigorous and deeper root system while others with a moderate to shallow root system. Among the shoot traits measured, pod harvest index, and seed number per area could serve as useful selection criteria for assessing sink strength and for genetic improvement of drought resistance in common bean.
dc.identifierhttps://hdl.handle.net/10568/80116
dc.identifier.urihttp://hdl.handle.net/123456789/86091
dc.languageen
dc.publisherFrontiers Media
dc.rightsOpen Access
dc.sourcePolania, Jose; Rao, Idupulapati M.; Cajiao, Cesar; Grajales, Miguel; Rivera, Mariela; Velasquez, Federico; Raatz, Bodo; Beebe, Stephen E.. 2017. Shoot and Root Traits Contribute to Drought Resistance in Recombinant Inbred Lines of MD 23–24 × SEA 5 of Common Bean . Frontiers in Plant Science 8: 296.
dc.subjectphaseolus vulgaris l.
dc.subjectabiotic stress
dc.subjectroot systems
dc.subjectyield
dc.subjectdrought resistance
dc.subjectgenetic improvement
dc.subjectdrought stress
dc.subjectestrés abiótico
dc.subjectsistema radicular
dc.subjectrendimiento
dc.subjectresistencia a la sequía
dc.subjectestrés de sequia
dc.titleShoot and Root Traits Contribute to Drought Resistance in Recombinant Inbred Lines of MD 23–24 × SEA 5 of Common Bean
dc.typeJournal Article

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