Identification of plant architecture and yield-related QTL in Vicia faba L. |
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Authors: | C. M. Ávila M. D. Ruiz-Rodríguez S. Cruz-Izquierdo S. G. Atienza J. I. Cubero A. M. Torres |
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Affiliation: | 1.área Mejora y Biotecnología,IFAPA-Centro Alameda del Obispo,Córdoba,Spain;2.Instituto de Agricultura Sostenible-CSIC,Córdoba,Spain;3.Colegio de Postgraduados,Recursos Genéticos y Productividad–Genética,Texcoco,Mexico;4.Department of Genetics, ETSIAM,University of Córdoba,Córdoba,Spain |
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Abstract: | Low and unstable yields across seasons and environments are among the main reasons which make profitability for farmers too low. Along with resistance/tolerance to biotic and abiotic stresses, plant architecture and yield-related traits are the main determinants of yield stability. The current study was conducted to identify and validate quantitative trait loci (QTL) for plant architecture and yield-related traits in faba bean; our results provide novel information about the genetics of plant architecture traits in this crop. An equina × paucijuga recombinant inbred line population was derived and submitted to field experiments at Córdoba (Spain) over a period of four seasons. Stable QTL were identified for eight of the traits evaluated. QTL clusters were identified on almost each chromosome. The high inter-trait correlations between some of the traits controlled by a cluster of QTL might reflect either a set of closely linked loci or, more likely, pleiotropic effects. The stability of many of these major QTL in different years offers the possibility of exploiting them via marker-assisted selection. Further fine mapping of these target regions will help to identify potential candidate genes using synteny. |
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