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Characterization of QTL and environmental interactions controlling flowering time in Andean common bean (Phaseolus vulgaris L.)

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Gonzalez, AM, Yuste-Lisbona, FJ, Weller, J ORCID: 0000-0003-2423-8286, Vander Schoor, JK, Lozano, R and Santalla, M 2021 , 'Characterization of QTL and environmental interactions controlling flowering time in Andean common bean (Phaseolus vulgaris L.)' , Frontiers in Plant Science, vol. 11 , pp. 1-16 , doi: 10.3389/fpls.2020.599462.

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Abstract

Genetic variation for response of flowering time to photoperiod plays an importantrole in adaptation to environments with different photoperiods, and as consequenceis an important contributor to plant productivity and yield. To elucidate the geneticcontrol of flowering time [days to flowering (DTF); growing degree days (GDD)] incommon bean, a facultative short-day plant, a quantitative trait loci (QTL) analysiswas performed in a recombinant inbred mapping population derived from a cultivatedaccession and a photoperiod sensitive landrace, grown in different long-day (LD) andshort-day (SD) environments by using a multiple-environment QTL model approach.A total of 37 QTL across 17 chromosome regions and 36 QTL-by-QTL interactions wereidentified for six traits associated with time to flowering and response to photoperiod.The DTF QTL accounted for 28 and 11% on average of the phenotypic variation inthe population across LD and SD environments, respectively. Of these, a genomicregion on chromosome 4 harboring the major DTF QTL was associated with bothflowering time in LD and photoperiod response traits, controlling more than 60% ofphenotypic variance, whereas a major QTL on chromosome 9 explained up to 32%of flowering time phenotypic variation in SD. Different epistatic interactions were foundin LD and SD environments, and the presence of significant QTL × environment (QE)and epistasis × environment interactions implies that flowering time control may rely ondifferent genes and genetic pathways under inductive and non-inductive conditions.Here, we report the identification of a novel major locus controlling photoperiodsensitivity on chromosome 4, which might interact with other loci for controlling commonbean flowering time and photoperiod response. Our results have also demonstrated theimportance of these interactions for flowering time control in common bean, and pointto the likely complexity of flowering time pathways. This knowledge will help to identifyand develop opportunities for adaptation and breeding of this legume crop.

Item Type: Article
Authors/Creators:Gonzalez, AM and Yuste-Lisbona, FJ and Weller, J and Vander Schoor, JK and Lozano, R and Santalla, M
Keywords: flowering, environmental interactions, photoperiod, genetic control, quantitative trait, phenotypic variation, epistasis, flowering time, photoperiod, QTL, common bean
Journal or Publication Title: Frontiers in Plant Science
Publisher: Frontiers Research Foundation
ISSN: 1664-462X
DOI / ID Number: 10.3389/fpls.2020.599462
Copyright Information:

Copyright © 2021 González, Yuste-Lisbona, Weller, Vander Schoor, Lozano and Santalla. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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