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Agronomy
Volume 12
Issue 6
10.3390/agronomy12061282
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Article

Investigation of Two QTL Conferring Seedling Resistance to Fusarium Crown Rot in Barley on Reducing Grain Yield Loss under Field Environments

by
Zhi Zheng
1,
Jonathan Powell
1,
Shang Gao
1,2,
Cassandra Percy
3,
Alison Kelly
4,
Bethany Macdonald
4,
Meixue Zhou
2,
Philip Davies
5,* and
Chunji Liu
1,*
1
Commonwealth Scientific and Industrial Research Organisation (CSIRO) Agriculture and Food, 306 Carmody Road, St. Lucia, QLD 4067, Australia
2
Tasmanian Institute of Agriculture, University of Tasmania, Prospect, TAS 7250, Australia
3
Centre for Crop Health, University of Southern Queensland, Toowoomba, QLD 4350, Australia
4
Leslie Research Facility, Department of Agriculture and Fisheries, Toowoomba, QLD 4350, Australia
5
The Plant Breeding Institute, School of Life and Environmental Sciences, The University of Sydney, Narrabri, NSW 2390, Australia
*
Authors to whom correspondence should be addressed.
Agronomy 2022, 12(6), 1282; https://doi.org/10.3390/agronomy12061282
Submission received: 6 April 2022 / Revised: 9 May 2022 / Accepted: 25 May 2022 / Published: 27 May 2022
(This article belongs to the Collection Crop Breeding for Stress Tolerance)
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Abstract

Fusarium crown rot (FCR) is one of the most damaging cereal diseases in semi-arid regions worldwide. Genetic studies on FCR resistance have mainly focused on disease symptoms measured by the browning of either leaf sheaths in seedlings or stems of mature plants. Two major QTLs conferring FCR resistance in barley, Qcsr.cpi-1H and Qcrs.cpi-4H, were previously identified in the growth room. They could explain up to 33.4 and 45.3% of phenotypic variance, respectively. This is the first study where the possible effects of FCR-resistant loci identified in the previous studies based on seedling assay are tested for their abilities to reduce grain yield loss. Near isogenic lines (NILs) and backcross (BC) lines targeting these two loci were assessed in the 2017 and 2018 crop seasons. Results from the NILs showed that the presence of a resistance allele at either the 1HL or 4HL locus reduced grain yield loss by an average of 12.0% and 10.7%, respectively. Grain yields of the top BC lines containing resistance alleles at both loci were 34.4% higher than the average of the commercial varieties under FCR inoculation. These lines will be highly valuable in breeding barley varieties with enhanced resistance to FCR.
Keywords: Fusarium crown rot; host resistance; barley; field assessment Fusarium crown rot; host resistance; barley; field assessment

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MDPI and ACS Style

Zheng, Z.; Powell, J.; Gao, S.; Percy, C.; Kelly, A.; Macdonald, B.; Zhou, M.; Davies, P.; Liu, C. Investigation of Two QTL Conferring Seedling Resistance to Fusarium Crown Rot in Barley on Reducing Grain Yield Loss under Field Environments. Agronomy 2022, 12, 1282. https://doi.org/10.3390/agronomy12061282

AMA Style

Zheng Z, Powell J, Gao S, Percy C, Kelly A, Macdonald B, Zhou M, Davies P, Liu C. Investigation of Two QTL Conferring Seedling Resistance to Fusarium Crown Rot in Barley on Reducing Grain Yield Loss under Field Environments. Agronomy. 2022; 12(6):1282. https://doi.org/10.3390/agronomy12061282

Chicago/Turabian Style

Zheng, Zhi, Jonathan Powell, Shang Gao, Cassandra Percy, Alison Kelly, Bethany Macdonald, Meixue Zhou, Philip Davies, and Chunji Liu. 2022. "Investigation of Two QTL Conferring Seedling Resistance to Fusarium Crown Rot in Barley on Reducing Grain Yield Loss under Field Environments" Agronomy 12, no. 6: 1282. https://doi.org/10.3390/agronomy12061282

APA Style

Zheng, Z., Powell, J., Gao, S., Percy, C., Kelly, A., Macdonald, B., Zhou, M., Davies, P., & Liu, C. (2022). Investigation of Two QTL Conferring Seedling Resistance to Fusarium Crown Rot in Barley on Reducing Grain Yield Loss under Field Environments. Agronomy, 12(6), 1282. https://doi.org/10.3390/agronomy12061282

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