Login | Request Account (DAF staff only)

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

Zheng, Z., Powell, J., Gao, S., Percy, C., Kelly, A. M., Macdonald, B., Zhou, M., Davies, P. and 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). p. 1282. ISSN 2073-4395

[img]
Preview
PDF
1MB

Article Link(s): https://doi.org/10.3390/agronomy12061282

Publisher URL: https://www.mdpi.com/2073-4395/12/6/1282

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.

Item Type:Article
Business groups:Crop and Food Science
Keywords:Fusarium crown rot; host resistance; barley; field assessment
Subjects:Science > Botany > Genetics
Plant culture > Field crops > Barley
Plant pests and diseases
Deposited On:13 Jun 2022 05:58
Last Modified:13 Jun 2022 05:58

Repository Staff Only: item control page

Downloads

Downloads per month over past year

View more statistics