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Grain number and grain yield distribution along the spike remain stable despite breeding for high yield in winter wheat

Two winter wheat (Triticum aestivum L.) populations, i.e. 180 genetic resources and 210 elite varieties, were compared in a field trial to analyse how grain number and grain yield distribution along the spike changed during the breeding process and how this associates to yield-related traits. Elites...

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Autores principales: Philipp, Norman, Weichert, Heiko, Bohra, Utkarsh, Weschke, Winfriede, Schulthess, Albert Wilhelm, Weber, Hans
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6179273/
https://www.ncbi.nlm.nih.gov/pubmed/30304020
http://dx.doi.org/10.1371/journal.pone.0205452
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author Philipp, Norman
Weichert, Heiko
Bohra, Utkarsh
Weschke, Winfriede
Schulthess, Albert Wilhelm
Weber, Hans
author_facet Philipp, Norman
Weichert, Heiko
Bohra, Utkarsh
Weschke, Winfriede
Schulthess, Albert Wilhelm
Weber, Hans
author_sort Philipp, Norman
collection PubMed
description Two winter wheat (Triticum aestivum L.) populations, i.e. 180 genetic resources and 210 elite varieties, were compared in a field trial to analyse how grain number and grain yield distribution along the spike changed during the breeding process and how this associates to yield-related traits. Elites showed in average 38% more yield compared to resources. This breeding improvement mainly derived from an increase in grains and yield per spike in addition to grains and yield per spikelet. These increments corresponded to 19, 23, 21 and 25%, respectively. Not much gain in thousand grain weight (4%) was observed in elites as compared to resources. The number of spikelets per spike was not, or even negatively, correlated with most traits, except of grains per spike, which suggests that this trait was not favoured during breeding. The grain number and grain yield distributions along the spike (GDAS and GYDAS) were measured and compared by using a novel mathematical tool. GDAS and GYDAS measure the deviation of a spike of interest from the architecture of a model spike with even grain and yield distribution along all spikelets, respectively. Both traits were positively correlated. Elites showed in average only a 1% improvement in GDAS and GYDAS values compared to resources. This comparison revealed that breeding increased grain number and yield uniformly along the spike without changing relative yield input of individual spikelets, thereby, maintaining the general spike architecture.
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spelling pubmed-61792732018-10-26 Grain number and grain yield distribution along the spike remain stable despite breeding for high yield in winter wheat Philipp, Norman Weichert, Heiko Bohra, Utkarsh Weschke, Winfriede Schulthess, Albert Wilhelm Weber, Hans PLoS One Research Article Two winter wheat (Triticum aestivum L.) populations, i.e. 180 genetic resources and 210 elite varieties, were compared in a field trial to analyse how grain number and grain yield distribution along the spike changed during the breeding process and how this associates to yield-related traits. Elites showed in average 38% more yield compared to resources. This breeding improvement mainly derived from an increase in grains and yield per spike in addition to grains and yield per spikelet. These increments corresponded to 19, 23, 21 and 25%, respectively. Not much gain in thousand grain weight (4%) was observed in elites as compared to resources. The number of spikelets per spike was not, or even negatively, correlated with most traits, except of grains per spike, which suggests that this trait was not favoured during breeding. The grain number and grain yield distributions along the spike (GDAS and GYDAS) were measured and compared by using a novel mathematical tool. GDAS and GYDAS measure the deviation of a spike of interest from the architecture of a model spike with even grain and yield distribution along all spikelets, respectively. Both traits were positively correlated. Elites showed in average only a 1% improvement in GDAS and GYDAS values compared to resources. This comparison revealed that breeding increased grain number and yield uniformly along the spike without changing relative yield input of individual spikelets, thereby, maintaining the general spike architecture. Public Library of Science 2018-10-10 /pmc/articles/PMC6179273/ /pubmed/30304020 http://dx.doi.org/10.1371/journal.pone.0205452 Text en © 2018 Philipp 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
Philipp, Norman
Weichert, Heiko
Bohra, Utkarsh
Weschke, Winfriede
Schulthess, Albert Wilhelm
Weber, Hans
Grain number and grain yield distribution along the spike remain stable despite breeding for high yield in winter wheat
title Grain number and grain yield distribution along the spike remain stable despite breeding for high yield in winter wheat
title_full Grain number and grain yield distribution along the spike remain stable despite breeding for high yield in winter wheat
title_fullStr Grain number and grain yield distribution along the spike remain stable despite breeding for high yield in winter wheat
title_full_unstemmed Grain number and grain yield distribution along the spike remain stable despite breeding for high yield in winter wheat
title_short Grain number and grain yield distribution along the spike remain stable despite breeding for high yield in winter wheat
title_sort grain number and grain yield distribution along the spike remain stable despite breeding for high yield in winter wheat
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6179273/
https://www.ncbi.nlm.nih.gov/pubmed/30304020
http://dx.doi.org/10.1371/journal.pone.0205452
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