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Research Article
Ana Clara Pontaroli
Unidad Integrada Balcarce and CONICET
Corresponding Author
ORCiD: https://orcid.org/0000-0002-2605-7668
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Fusarium head blight (FHB) remains a devastating disease in bread wheat (Triticum aestivum L.) and other small grains. Genetic resistance to FHB is a complex trait; in addition to active physiological resistance, plant developmental and morphological traits may indirectly affect disease progression and provide a passive mechanism of resistance. In this study, we investigated the relationship between FHB type II resistance and spike architecture traits in a recombinant inbred line (RIL) population of bread wheat. Disease resistance traits were FHB severity at 21 days post inoculation (dpi) and area under the disease progress curve (AUDPC). Spike architecture traits measured were rachis length, spike density, number of spikelets per spike, florets per spike and florets per spikelet.
The RIL population showed significant variation for all traits. Heritability values were moderate to high for FHB severity (0.69) and AUDPC (0.63) and high for the spike architecture traits (0.74 - 0.92). FHB severity and AUDPC showed a moderate and significant association with the number of florets per spike (r = 0.38 and r = 0.31, respectively) and with the number of florets per spikelet (r = 0.28 and r = 0.27, respectively), reflecting a greater spread of the fungus in spikes with higher floret number. These results suggest that the number of florets per spike and the number of florets per spikelet should be considered in FHB resistance breeding efforts, because selection of lines with higher number of florets could lead to a correlated selection response towards increased FHB levels under field conditions.
Keywords
Fusarium graminearum, Triticum aestivum L., inflorescence traits, passive resistance
Figure 1
Figure 2
The full text of this article is available to read as a PDF.
This is a list of supplementary files associated with this preprint. Click to download.
- FigS1.tif
Fig. S1 Maximum, minimum and medium temperature during the anthesis period in Experiment 1 in 2016 (a), Experiment 2 in 2016 (b), Experiment 1 in 2017 (c) and Experiment 2 in 2017 (d)
- FigS2.tif
Fig. S2 Rainfall (bars) and relative humidity (lines) during the anthesis period in Experiment 1 in 2016 (a), Experiment 2 in 2016 (b), Experiment 1 in 2017 (c) and Experiment 2 in 2017 (d)
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CURRENT STATUS: Published
View the published article at Euphytica.
Version 1
Posted 30 Mar, 2021
No community comments so far
Editorial decision: Minor revisions
On 06 May, 2021
Reviews received
Received 13 Mar, 2021
Reviewers invited
Invitations sent on 13 Mar, 2021
Editor invited
On 25 Feb, 2021
Editor assigned
On 14 Feb, 2021
First submitted
On 14 Feb, 2021
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Subject Areas
Plant Molecular Biology and Genetics
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A new preprint design is coming!
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See the published version of this preprint at Euphytica.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Ana Clara Pontaroli
Unidad Integrada Balcarce and CONICET
Corresponding Author
ORCiD: https://orcid.org/0000-0002-2605-7668
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at Euphytica.
Version 1
Posted 30 Mar, 2021
No community comments so far
Editorial decision: Minor revisions
On 06 May, 2021
Reviews received
Received 13 Mar, 2021
Reviewers invited
Invitations sent on 13 Mar, 2021
Editor invited
On 25 Feb, 2021
Editor assigned
On 14 Feb, 2021
First submitted
On 14 Feb, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Plant Molecular Biology and Genetics
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Euphytica.
Fusarium head blight (FHB) remains a devastating disease in bread wheat (Triticum aestivum L.) and other small grains. Genetic resistance to FHB is a complex trait; in addition to active physiological resistance, plant developmental and morphological traits may indirectly affect disease progression and provide a passive mechanism of resistance. In this study, we investigated the relationship between FHB type II resistance and spike architecture traits in a recombinant inbred line (RIL) population of bread wheat. Disease resistance traits were FHB severity at 21 days post inoculation (dpi) and area under the disease progress curve (AUDPC). Spike architecture traits measured were rachis length, spike density, number of spikelets per spike, florets per spike and florets per spikelet.
The RIL population showed significant variation for all traits. Heritability values were moderate to high for FHB severity (0.69) and AUDPC (0.63) and high for the spike architecture traits (0.74 - 0.92). FHB severity and AUDPC showed a moderate and significant association with the number of florets per spike (r = 0.38 and r = 0.31, respectively) and with the number of florets per spikelet (r = 0.28 and r = 0.27, respectively), reflecting a greater spread of the fungus in spikes with higher floret number. These results suggest that the number of florets per spike and the number of florets per spikelet should be considered in FHB resistance breeding efforts, because selection of lines with higher number of florets could lead to a correlated selection response towards increased FHB levels under field conditions.
Figure 1
Figure 2
The full text of this article is available to read as a PDF.
This is a list of supplementary files associated with this preprint. Click to download.
- FigS1.tif
Fig. S1 Maximum, minimum and medium temperature during the anthesis period in Experiment 1 in 2016 (a), Experiment 2 in 2016 (b), Experiment 1 in 2017 (c) and Experiment 2 in 2017 (d)
- FigS2.tif
Fig. S2 Rainfall (bars) and relative humidity (lines) during the anthesis period in Experiment 1 in 2016 (a), Experiment 2 in 2016 (b), Experiment 1 in 2017 (c) and Experiment 2 in 2017 (d)
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