Different grain-filling rates explain grain-weight differences along the wheat ear
Thousand grain weight is one of the components determining wheat grain yield. It represents the average value of individual grain weights which depends on position within the ear and on positon within the spikelet. Our objective was to quantify the influences of individual floret anthesis date, of c...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6312219/ https://www.ncbi.nlm.nih.gov/pubmed/30596702 http://dx.doi.org/10.1371/journal.pone.0209597 |
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author | Baillot, Nadège Girousse, Christine Allard, Vincent Piquet-Pissaloux, Agnès Le Gouis, Jacques |
author_facet | Baillot, Nadège Girousse, Christine Allard, Vincent Piquet-Pissaloux, Agnès Le Gouis, Jacques |
author_sort | Baillot, Nadège |
collection | PubMed |
description | Thousand grain weight is one of the components determining wheat grain yield. It represents the average value of individual grain weights which depends on position within the ear and on positon within the spikelet. Our objective was to quantify the influences of individual floret anthesis date, of carpel weight at anthesis and of rate and duration of grain filling, on variation in individual final grain weight. Two bread wheat cultivars were grown in a greenhouse and their ears were sampled from anthesis through to harvest. Each ear was divided into three parts—basal, central and apical—where the two proximal grains were dissected from each of two spikelets. We analysed (i) the flowering time shift within the ear and within the spikelet; and (ii) the growth kinetics during grain filling in relation to position along the ear. For both cultivars, florets located in the central part of the ear were the first to reach anthesis followed by those in the apical part and then the basal part. Within a spikelet, the floret located nearest the rachis flowered first followed by the more distal ones. We found no significant systematic effect of flowering time-shift on final grain weight. Nevertheless, grains in the central part were heavier than the basal ones (9.75% smaller) and than the apical ones (18.25% smaller). These differences were explained mainly by differences in mean grain filling rates. Analysis of growth kinetics enabled an improved explanation of the variability of individual grain weight along the ear. |
format | Online Article Text |
id | pubmed-6312219 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-63122192019-01-08 Different grain-filling rates explain grain-weight differences along the wheat ear Baillot, Nadège Girousse, Christine Allard, Vincent Piquet-Pissaloux, Agnès Le Gouis, Jacques PLoS One Research Article Thousand grain weight is one of the components determining wheat grain yield. It represents the average value of individual grain weights which depends on position within the ear and on positon within the spikelet. Our objective was to quantify the influences of individual floret anthesis date, of carpel weight at anthesis and of rate and duration of grain filling, on variation in individual final grain weight. Two bread wheat cultivars were grown in a greenhouse and their ears were sampled from anthesis through to harvest. Each ear was divided into three parts—basal, central and apical—where the two proximal grains were dissected from each of two spikelets. We analysed (i) the flowering time shift within the ear and within the spikelet; and (ii) the growth kinetics during grain filling in relation to position along the ear. For both cultivars, florets located in the central part of the ear were the first to reach anthesis followed by those in the apical part and then the basal part. Within a spikelet, the floret located nearest the rachis flowered first followed by the more distal ones. We found no significant systematic effect of flowering time-shift on final grain weight. Nevertheless, grains in the central part were heavier than the basal ones (9.75% smaller) and than the apical ones (18.25% smaller). These differences were explained mainly by differences in mean grain filling rates. Analysis of growth kinetics enabled an improved explanation of the variability of individual grain weight along the ear. Public Library of Science 2018-12-31 /pmc/articles/PMC6312219/ /pubmed/30596702 http://dx.doi.org/10.1371/journal.pone.0209597 Text en © 2018 Baillot et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Baillot, Nadège Girousse, Christine Allard, Vincent Piquet-Pissaloux, Agnès Le Gouis, Jacques Different grain-filling rates explain grain-weight differences along the wheat ear |
title | Different grain-filling rates explain grain-weight differences along the wheat ear |
title_full | Different grain-filling rates explain grain-weight differences along the wheat ear |
title_fullStr | Different grain-filling rates explain grain-weight differences along the wheat ear |
title_full_unstemmed | Different grain-filling rates explain grain-weight differences along the wheat ear |
title_short | Different grain-filling rates explain grain-weight differences along the wheat ear |
title_sort | different grain-filling rates explain grain-weight differences along the wheat ear |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6312219/ https://www.ncbi.nlm.nih.gov/pubmed/30596702 http://dx.doi.org/10.1371/journal.pone.0209597 |
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