A Predictive Model for Time-to-Flowering in the Common Bean Based on QTL and Environmental Variables.

Autor: Bhakta MS; Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611., Gezan SA; School of Forest Resources and Conservation, University of Florida, Gainesville, Florida 32611., Clavijo Michelangeli JA; Agronomy Department, University of Florida, Gainesville, Florida 32511., Carvalho M; School of Forest Resources and Conservation, University of Florida, Gainesville, Florida 32611., Zhang L; Agricultural and Biological Engineering Department, University of Florida, Gainesville, Florida 32611., Jones JW; Agricultural and Biological Engineering Department, University of Florida, Gainesville, Florida 32611., Boote KJ; Agronomy Department, University of Florida, Gainesville, Florida 32511., Correll MJ; Agricultural and Biological Engineering Department, University of Florida, Gainesville, Florida 32611., Beaver J; Department of Agro-Environmental Sciences, University of Puerto Rico, Mayaguez, Puerto Rico 00681-9000., Osorno JM; Plant Sciences Department, North Dakota State University, Fargo, North Dakota 58105., Colbert R; Plant Sciences Department, North Dakota State University, Fargo, North Dakota 58105., Rao I; International Center for Tropical Agriculture (CIAT), A. A. 6713, Cali, Colombia 763533., Beebe S; International Center for Tropical Agriculture (CIAT), A. A. 6713, Cali, Colombia 763533., Gonzalez A; Department of Agro-Environmental Sciences, University of Puerto Rico, Mayaguez, Puerto Rico 00681-9000., Ricaurte J; International Center for Tropical Agriculture (CIAT), A. A. 6713, Cali, Colombia 763533., Vallejos CE; Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611 vallejos@ufl.edu.; Plant Molecular and Cellular Biology Graduate Program, University of Florida, Gainesville, Florida 32611.
Jazyk: angličtina
Zdroj: G3 (Bethesda, Md.) [G3 (Bethesda)] 2017 Dec 04; Vol. 7 (12), pp. 3901-3912. Date of Electronic Publication: 2017 Dec 04.
DOI: 10.1534/g3.117.300229
Abstrakt: The common bean is a tropical facultative short-day legume that is now grown in tropical and temperate zones. This observation underscores how domestication and modern breeding can change the adaptive phenology of a species. A key adaptive trait is the optimal timing of the transition from the vegetative to the reproductive stage. This trait is responsive to genetically controlled signal transduction pathways and local climatic cues. A comprehensive characterization of this trait can be started by assessing the quantitative contribution of the genetic and environmental factors, and their interactions. This study aimed to locate significant QTL (G) and environmental (E) factors controlling time-to-flower in the common bean, and to identify and measure G × E interactions. Phenotypic data were collected from a biparental [Andean × Mesoamerican] recombinant inbred population (F 11:14 , 188 genotypes) grown at five environmentally distinct sites. QTL analysis using a dense linkage map revealed 12 QTL, five of which showed significant interactions with the environment. Dissection of G × E interactions using a linear mixed-effect model revealed that temperature, solar radiation, and photoperiod play major roles in controlling common bean flowering time directly, and indirectly by modifying the effect of certain QTL. The model predicts flowering time across five sites with an adjusted r -square of 0.89 and root-mean square error of 2.52 d. The model provides the means to disentangle the environmental dependencies of complex traits, and presents an opportunity to identify in silico QTL allele combinations that could yield desired phenotypes under different climatic conditions.
(Copyright © 2017 Bhakta et al.)
Databáze: MEDLINE
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