Identification of quantitative trait loci (QTL) for resistance to Fusarium crown rot (Fusarium pseudograminearum) in multiple assay environments in the Pacific Northwestern US

Poole, Grant J.; Smiley, Richard W.; Paulitz, T. C.; Walker, Carl; Carter, Arron H.; See, Deven R.; Garland‐Campbell, Kimberly

doi:10.1007/s00122-012-1818-6

Cited by 68 publications

(53 citation statements)

References 42 publications

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“…For field-grown plants, most systems visually assess the extent of browning of basal intemodes on the culm or of the percentage of culms which die prematurely, as measured by development of "whiteheads" containing shriveled kernels of grain (6,28,39). For controlled-environment studies, most systems visually assess the extent of browning on lower leaf sheaths, as summarized by Poole et al (30). Because effects of P. thomei and F. culmorum cannot be reliably rated independenfly for adult-plant studies performed outdoors, we used the following descriptive rating scale that combined effects of both pathogens but was most sitnilar to rating scales used to assess effects of crown rot.…”

Section: Methodsmentioning

confidence: 99%

Effects of Co-inoculation with Pratylenchus thornei and Fusarium culmorum on Growth and Yield of Winter Wheat

2013

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Hajihassani, A., Smiley, R. W., and Afshar, F. J. 2013. Effects of co-inoculation with Pratylenchus thomei and Fusarium culmorum on growth and yield of winter wheat. Plant Dis. 97:1470-1477.Growth and yield of winter wheat are suppressed by Pratylenchus thomei and by Fusarium culmorum. Many fields in cereal production regions throughout the world are infested by both pathogens. We evaluated effects of one or both pathogens on winter wheat growth, grain yield, and disease parameters at heading and harvest stages over 2 years in inoculated, rainfed pots incubated outdoors. P. thornei nematodes were inoculated at 1, 2, or 4 nematodes/g of soil and F. culmorum was added as colonized millet seed at 0.65 g/kg of soil. At harvest, compared with the noninoculated control, the high rate of P. thornei reduced {P < 0.05) plant height, shoot weight, root weight, and grain yield by 19, 17, 48, and 31%, respectively. F. culmorum alone reduced these parameters by 15, 16, 22, and 22%, respectively. Co-inoculations caused reductions of 27, 38, 61, and 63%, respectively. The reproductive rate of P. thomei was not greatly affected by co-inoculation with F. culmorum. Disease severity ratings at both plant growth stages became amplified as the nematode density was increased, and were much greater in the presence of both pathogens. Effects of co-inoculation on grain yield were slightly greater than predicted by additive effects of the individual pathogens, suggesting a synergistic effect on yield depression.Production of cereals is constrained globally by root diseases caused by plant-parasitic nematodes and plant-pathogenic fungi. Nematodes most commonly associated with economic damage to wheat {Triticum aestivum L.), barley {Hordeum vulgäre L.), and oat {Avena sativa L.) include the root-lesion nematodes Pratyletichus negiectus (Rench) Filipjev Schuurmanns & Stekhoven and P. thornei Sher & Allen, and the cereal cyst nematodes Heterodera avenae WolL, H. filipjevi Madzhidov, and H. latipons Franklin (35,43). Likewise, essentially all temperate cereal-production regions are infested by pathogens causing root diseases such as Fusarium crown rot {Fusarium culmorum (W.G. Sm.) Sacc. and F. pseudograminearum O'Donnell & T. Aoki), common root rot {Bi-polaris sorokiniana (Sacc.) Shoemaker), Rhizoctonia root rot {Rhi-zoctonia solani J.G. Ktibn AG-8), Pythium root rot (multiple species of Pythium Pringsheim), and take-all {Gaeumannomyces graminis var. tritici J. Walker) (39). The international literature is expansive for cereal diseases caused by these nematodes and fungi. However, most reports are focused upon the biology and management of a single causal agent. Reports of associations between species of nematodes, species of fungi, or of nematodes and fungi are much less common.Interactions between root-invading nematodes and root-infecting fungi have been known for more than a century (2). However, most reviews and individual reports have addressed interactions of nematodes with vascular wilt fungi such as Verticillium dahliae and F. oxyspor...

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Section: Methodsmentioning

confidence: 99%

Effects of Co-inoculation with Pratylenchus thornei and Fusarium culmorum on Growth and Yield of Winter Wheat

2013

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“…The variation among pathogenic isolates associated with the FCR complex has been previously studied by employing various assessment standards of inoculation techniques, including millet seeds, spore suspension and agar plugs (Akinsanmi et al, 2004;Fernandez and Chen, 2005;Smiley et al, 2005a;Mitter et al, 2006;Nicol et al, 2007;Li et al, 2008;Dyer et al, 2009;Gargouri-Kammoun et al, 2009;Yang et al, 2010;Poole et al, 2012). Most of these studies found that F. pseudograminearum and F. culmorum were the most pathogenic species, and F. avenaceum, F. equiseti and F. poae were the least pathogenic species.…”

Section: Introductionmentioning

confidence: 99%

Diversity of theFusariumpathogens associated with crown rot in the Huanghuai wheat‐growing region of China

Zhou

Wang

et al. 2019

Environmental Microbiology

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Summary To investigate the distribution and diversity of the pathogens associated with Fusarium crown rot in the Huanghuai wheat‐growing region (HHWGR) of China, we collected wheat samples with symptomatic stem bases from seven provinces in the HHWGR between 2013 and 2016. A total of 1196 isolates obtained from 222 locations were identified as 9 Fusarium species based on morphological and molecular identification. Of these pathogen species, F. pseudograminearum was the dominant species. Furthermore, F. sinensis was isolated from the disease specimens and tested for virulence to wheat. The result of the pathogenicity revealed that an intraspecific differentiation existed in F. pseudograminearum; sequence analysis of the EF‐1α gene showed that 194 F. pseudograminearum isolates were differentiated into two distinct clades which closed to the strains from Australia and China respectively, but neither pathogenicity nor EF‐1α sequence was related to the geographic origins of these isolates. However, universal rice primers‐polymerase chain reaction showed a correlation with the geographical origins of the 194 isolates, which were divided into eight subclusters, the level of genetic diversity was higher within a geographical population than among the different populations. The results of these analyses can be directly used to facilitate disease monitoring and development of control strategies.

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“…Significant progresses in identifying QTL conferring FCR resistance have been made recently in wheat [11]–[13]. However, similar studies in barley have been limited.…”

Section: Introductionmentioning

confidence: 99%

A Novel and Major Quantitative Trait Locus for Fusarium Crown Rot Resistance in a Genotype of Wild Barley (Hordeum spontaneum L.)

Chen

Liu

et al. 2013

PLoS ONE

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Fusarium crown rot (FCR), caused by various Fusarium species, is a destructive disease of cereal crops in semiarid regions worldwide. As part of our contribution to the development of Fusarium resistant cultivars, we identified several novel sources of resistance by systematically assessing barley genotypes representing different geographical origins and plant types. One of these sources of resistance was investigated in this study by generating and analysing two populations of recombinant inbred lines. A major locus conferring FCR resistance, designated as Qcrs.cpi-4H, was detected in one of the populations (mapping population) and the effects of the QTL was confirmed in the other population. The QTL was mapped to the distal end of chromosome arm 4HL and it is effective against both of the Fusarium isolates tested, one F. pseudograminearum and the other F. graminearum. The QTL explains up to 45.3% of the phenotypic variance. As distinct from an earlier report which demonstrated co-locations of loci conferring FCR resistance and plant height in barley, a correlation between these two traits was not detected in the mapping population. However, as observed in a screen of random genotypes, an association between FCR resistance and plant growth rate was detected and a QTL controlling the latter was detected near the Qcrs.cpi-4H locus in the mapping population. Existing data indicate that, although growth rate may affect FCR resistance, different genes at this locus are likely involved in controlling these two traits.

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Identification of quantitative trait loci (QTL) for resistance to Fusarium crown rot (Fusarium pseudograminearum) in multiple assay environments in the Pacific Northwestern US

Cited by 68 publications

References 42 publications

Effects of Co-inoculation with Pratylenchus thornei and Fusarium culmorum on Growth and Yield of Winter Wheat

Effects of Co-inoculation with Pratylenchus thornei and Fusarium culmorum on Growth and Yield of Winter Wheat

Diversity of theFusariumpathogens associated with crown rot in the Huanghuai wheat‐growing region of China

A Novel and Major Quantitative Trait Locus for Fusarium Crown Rot Resistance in a Genotype of Wild Barley (Hordeum spontaneum L.)

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