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Time-to-event analysis to evaluate dormancy status of single-bud cuttings: an example for grapevines

BACKGROUND: The reduced growth of plants during the winter causes a lack in the perceptibility of the phenological events making challenging the study of dormancy. For deciduous crops, dormancy is generally determined by evaluating budbreak of single-node cuttings that are exposed to conditions suit...

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Autores principales: Camargo Alvarez, Hector, Salazar-Gutiérrez, Melba, Zapata, Diana, Keller, Markus, Hoogenboom, Gerrit
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6203998/
https://www.ncbi.nlm.nih.gov/pubmed/30386412
http://dx.doi.org/10.1186/s13007-018-0361-0
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author Camargo Alvarez, Hector
Salazar-Gutiérrez, Melba
Zapata, Diana
Keller, Markus
Hoogenboom, Gerrit
author_facet Camargo Alvarez, Hector
Salazar-Gutiérrez, Melba
Zapata, Diana
Keller, Markus
Hoogenboom, Gerrit
author_sort Camargo Alvarez, Hector
collection PubMed
description BACKGROUND: The reduced growth of plants during the winter causes a lack in the perceptibility of the phenological events making challenging the study of dormancy. For deciduous crops, dormancy is generally determined by evaluating budbreak of single-node cuttings that are exposed to conditions suitable for growth. However, the absence of a statistical basis for analyzing and interpreting the budbreak behavior evaluated as the percent budbreak, the average time to budbreak and the time to reach 50% budbreak, has caused inconsistent and contradictory criteria to identify the dormancy status of different deciduous crops. RESULTS: In this study, a method was developed to analyze the duration between sampling and budbreak of single-node cuttings and to estimate the dormancy status for grapevines (Vitis vinifera L.) based on the time-to-event distribution of the observations. This method estimates the probability curve of budbreak for each sample and classifies each curve into paradormancy, endodormancy, and ecodormancy according to the significance when compared to a sample curve estimated from cuttings collected during paradormancy and referred to as “reference.” CONCLUSION: The approach described in this study provided a comparison of the budbreak distribution of cuttings collected during distinct phases with a confidence of 95%. It also allowed the estimation of the date of occurrence of the dormancy stages for two grapevine cultivars ‘Cabernet Sauvignon’ and ‘Chardonnay,’ based on the variability within the sampling season rather than on fixed arbitrary criteria. This approach can also be used to analyze budbreak data of single-node cuttings from other common deciduous crops. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s13007-018-0361-0) contains supplementary material, which is available to authorized users.
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spelling pubmed-62039982018-11-01 Time-to-event analysis to evaluate dormancy status of single-bud cuttings: an example for grapevines Camargo Alvarez, Hector Salazar-Gutiérrez, Melba Zapata, Diana Keller, Markus Hoogenboom, Gerrit Plant Methods Methodology BACKGROUND: The reduced growth of plants during the winter causes a lack in the perceptibility of the phenological events making challenging the study of dormancy. For deciduous crops, dormancy is generally determined by evaluating budbreak of single-node cuttings that are exposed to conditions suitable for growth. However, the absence of a statistical basis for analyzing and interpreting the budbreak behavior evaluated as the percent budbreak, the average time to budbreak and the time to reach 50% budbreak, has caused inconsistent and contradictory criteria to identify the dormancy status of different deciduous crops. RESULTS: In this study, a method was developed to analyze the duration between sampling and budbreak of single-node cuttings and to estimate the dormancy status for grapevines (Vitis vinifera L.) based on the time-to-event distribution of the observations. This method estimates the probability curve of budbreak for each sample and classifies each curve into paradormancy, endodormancy, and ecodormancy according to the significance when compared to a sample curve estimated from cuttings collected during paradormancy and referred to as “reference.” CONCLUSION: The approach described in this study provided a comparison of the budbreak distribution of cuttings collected during distinct phases with a confidence of 95%. It also allowed the estimation of the date of occurrence of the dormancy stages for two grapevine cultivars ‘Cabernet Sauvignon’ and ‘Chardonnay,’ based on the variability within the sampling season rather than on fixed arbitrary criteria. This approach can also be used to analyze budbreak data of single-node cuttings from other common deciduous crops. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s13007-018-0361-0) contains supplementary material, which is available to authorized users. BioMed Central 2018-10-27 /pmc/articles/PMC6203998/ /pubmed/30386412 http://dx.doi.org/10.1186/s13007-018-0361-0 Text en © The Author(s) 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Methodology
Camargo Alvarez, Hector
Salazar-Gutiérrez, Melba
Zapata, Diana
Keller, Markus
Hoogenboom, Gerrit
Time-to-event analysis to evaluate dormancy status of single-bud cuttings: an example for grapevines
title Time-to-event analysis to evaluate dormancy status of single-bud cuttings: an example for grapevines
title_full Time-to-event analysis to evaluate dormancy status of single-bud cuttings: an example for grapevines
title_fullStr Time-to-event analysis to evaluate dormancy status of single-bud cuttings: an example for grapevines
title_full_unstemmed Time-to-event analysis to evaluate dormancy status of single-bud cuttings: an example for grapevines
title_short Time-to-event analysis to evaluate dormancy status of single-bud cuttings: an example for grapevines
title_sort time-to-event analysis to evaluate dormancy status of single-bud cuttings: an example for grapevines
topic Methodology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6203998/
https://www.ncbi.nlm.nih.gov/pubmed/30386412
http://dx.doi.org/10.1186/s13007-018-0361-0
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