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Genome-Based Prediction of Time to Curd Induction in Cauliflower

The development of cauliflower (Brassica oleracea var. botrytis) is highly dependent on temperature due to vernalization requirements, which often causes delay and unevenness in maturity during months with warm temperatures. Integrating quantitative genetic analyses with phenology modeling was sugge...

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Autores principales: Rosen, Arne, Hasan, Yaser, Briggs, William, Uptmoor, Ralf
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5807883/
https://www.ncbi.nlm.nih.gov/pubmed/29467774
http://dx.doi.org/10.3389/fpls.2018.00078
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author Rosen, Arne
Hasan, Yaser
Briggs, William
Uptmoor, Ralf
author_facet Rosen, Arne
Hasan, Yaser
Briggs, William
Uptmoor, Ralf
author_sort Rosen, Arne
collection PubMed
description The development of cauliflower (Brassica oleracea var. botrytis) is highly dependent on temperature due to vernalization requirements, which often causes delay and unevenness in maturity during months with warm temperatures. Integrating quantitative genetic analyses with phenology modeling was suggested to accelerate breeding strategies toward wide-adaptation cauliflower. The present study aims at establishing a genome-based model simulating the development of doubled haploid (DH) cauliflower lines to predict time to curd induction of DH lines not used for model parameterization and test hybrids derived from the bi-parental cross. Leaf appearance rate and the relation between temperature and thermal time to curd induction were examined in greenhouse trials on 180 DH lines at seven temperatures. Quantitative trait loci (QTL) analyses carried out on model parameters revealed ten QTL for leaf appearance rate (LAR), five for the slope and two for the intercept of linear temperature-response functions. Results of the QTL-based phenology model were compared to a genomic selection (GS) model. Model validation was carried out on data comprising four field trials with 72 independent DH lines, 160 hybrids derived from the parameterization set, and 34 hybrids derived from independent lines of the population. The QTL model resulted in a moderately accurate prediction of time to curd induction (R(2) = 0.42–0.51) while the GS model generated slightly better results (R(2) = 0.52–0.61). Predictions of time to curd induction of test hybrids from independent DH lines were less precise with R(2) = 0.40 for the QTL and R(2) = 0.48 for the GS model. Implementation of juvenile-to-adult phase transition is proposed for model improvement.
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spelling pubmed-58078832018-02-21 Genome-Based Prediction of Time to Curd Induction in Cauliflower Rosen, Arne Hasan, Yaser Briggs, William Uptmoor, Ralf Front Plant Sci Plant Science The development of cauliflower (Brassica oleracea var. botrytis) is highly dependent on temperature due to vernalization requirements, which often causes delay and unevenness in maturity during months with warm temperatures. Integrating quantitative genetic analyses with phenology modeling was suggested to accelerate breeding strategies toward wide-adaptation cauliflower. The present study aims at establishing a genome-based model simulating the development of doubled haploid (DH) cauliflower lines to predict time to curd induction of DH lines not used for model parameterization and test hybrids derived from the bi-parental cross. Leaf appearance rate and the relation between temperature and thermal time to curd induction were examined in greenhouse trials on 180 DH lines at seven temperatures. Quantitative trait loci (QTL) analyses carried out on model parameters revealed ten QTL for leaf appearance rate (LAR), five for the slope and two for the intercept of linear temperature-response functions. Results of the QTL-based phenology model were compared to a genomic selection (GS) model. Model validation was carried out on data comprising four field trials with 72 independent DH lines, 160 hybrids derived from the parameterization set, and 34 hybrids derived from independent lines of the population. The QTL model resulted in a moderately accurate prediction of time to curd induction (R(2) = 0.42–0.51) while the GS model generated slightly better results (R(2) = 0.52–0.61). Predictions of time to curd induction of test hybrids from independent DH lines were less precise with R(2) = 0.40 for the QTL and R(2) = 0.48 for the GS model. Implementation of juvenile-to-adult phase transition is proposed for model improvement. Frontiers Media S.A. 2018-02-05 /pmc/articles/PMC5807883/ /pubmed/29467774 http://dx.doi.org/10.3389/fpls.2018.00078 Text en Copyright © 2018 Rosen, Hasan, Briggs and Uptmoor. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner 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.
spellingShingle Plant Science
Rosen, Arne
Hasan, Yaser
Briggs, William
Uptmoor, Ralf
Genome-Based Prediction of Time to Curd Induction in Cauliflower
title Genome-Based Prediction of Time to Curd Induction in Cauliflower
title_full Genome-Based Prediction of Time to Curd Induction in Cauliflower
title_fullStr Genome-Based Prediction of Time to Curd Induction in Cauliflower
title_full_unstemmed Genome-Based Prediction of Time to Curd Induction in Cauliflower
title_short Genome-Based Prediction of Time to Curd Induction in Cauliflower
title_sort genome-based prediction of time to curd induction in cauliflower
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5807883/
https://www.ncbi.nlm.nih.gov/pubmed/29467774
http://dx.doi.org/10.3389/fpls.2018.00078
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