Yield losses in barley cultivars caused by spot blotch

Clark, R. V.

doi:10.1080/07060667909501473

Cited by 45 publications

(24 citation statements)

References 7 publications

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“…Under conditions favourable for the disease, yield losses from 16 to 33% can occur in susceptible barley cultivars (Clark 1979). The current study provides some indication that high rates of swine slurry may be associated with lower incidence of disease in barley, although, further research is required to confirm these initial observations (Table 6).…”

Section: Discussionsupporting

confidence: 49%

Agronomic performance of barley cultivars in response to varying rates of swine slurry

2011

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. 2011. Agronomic performance of barley cultivars in response to varying rates of swine slurry. Can. J. Plant Sci. 91: 69Á79. Selection of crop variety may address concerns of potential adverse effects of preplant manure slurry application on crop yield and quality due to nutrient availability and lack of precision in application rate. An experiment was conducted in two field locations in southern Manitoba to assess the impact of slurry rate on growth, yield and quality of three barley (Hordeum vulgare L.) cultivars (Harrington, Rosser, Stander). Treatments included three rates of swine slurry, an unfertilized check and an inorganic fertilizer treatment at the recommended N rate based on preseeding soil nutrient tests. While the current study demonstrated no significant difference in the grain yield response of barley cultivars to rates of slurry application, higher rates of swine slurry may have a negative effect on milling quality (percentage of plump kernels) depending on cultivar, but had little effect on other quality parameters such as test weight and 1000-kernel weight. The absence of cultivar)slurry interaction for grain and biomass yield at each field location in each year indicated that all cultivars responded similarly to increasing rates of manure slurry for these traits. Grain protein concentration for all cultivars was unaffected by slurry amendment except at the highest application rate. . Les traitements consistaient en trois taux d'application de lisier de porc, en un traitement te´moin sans fertilisation et en un amendement avec de l'engrais inorganique, au taux recommande´pour l'azote, selon l'analyse du sol avant les semis. Bien que l'expe´rience n'ait re´ve´le´aucune variation sensible du rendement grainier des cultivars en fonction de la quantite´de lisier applique´e, un taux d'application plus e´leve´pourrait avoir une incidence ne´gative sur la qualite´a`la mouture (proportion de grains charnus), selon le cultivar employe´, sans toutefois nuire aux autres parame`tres qualitatifs comme le poids spe´cifique et le poids de mille grains. L'absence d'interaction entre le cultivar et la quantite´de lisier applique´e au niveau du rendement grainier et du rendement de la biomasse indique que les cultivars re´agissent de la meˆme manie`re al 'application d'une quantite´croissante de lisier pour les caracte`res examine´s. La concentration de prote´ines dans le grain des cultivars n'a pas e´te´affecte´e par le lisier, sauf au taux d'application le plus e´leve´.

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Section: Discussionsupporting

confidence: 49%

Agronomic performance of barley cultivars in response to varying rates of swine slurry

2011

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“…Helminthosporium sativum Pamm, King and Bakke is responsible for yield and quality reductions in many parts of the world (Piening et al, 1976;Nutter et al, 1985). In susceptible barley cultivars, average yield losses of 16%-33% have been reported (Clark, 1979). In Syria, Van Leur (1991) reported a 40% yield loss in barley due to infection by C. sativus.…”

Section: Introductionmentioning

confidence: 99%

Inheritance and identification of molecular markers associated with spot blotch (Cochliobolus sativus L.) resistance through microsatellites analysis in barley

et al. 2008

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Spot blotch resistant (IBON 18) and susceptible (RD 2508) lines were crossed to investigate inheritance of resistance and to identify simple sequence repeats (SSRs) associated with resistance. F 1 resistance was intermediate and suggested additive nature of inheritance. Three additive genes was noted in the distribution of F 3 , F 4 and F 5 generations. In F 6 and F 6-7 , the quantitative and qualitative approaches also suggested the control of three resistance genes. The parents and the RILs (F 6 /F 6-7 ) were grown in four environments and spot blotch severity recorded. Forty five SSR primers, specific for chromosomes 1 (7H) and 5 (1H), were applied. Of these, 12 were polymorphic between the parents, and between the resistant and susceptible bulks. Three markers BMS 32, BMS 90 and HVCMA showed association with resistance, which was further confirmed through selective genotyping. The co-segregation data on the molecular markers (BMS 32, BMS 90 and HVCMA) and spot blotch severity on 173 RILs was analyzed by single marker linear regression approach. Significant regression suggested linkage among BMS 32, BMS 90 and HVCMA and the three resistant genes (designated as Rcs-qtl-5H-1, Rcs-qtl-5H-2 and Rcs-qtl-1H-1.) respectively. These markers explained 28%, 19% and 12% of variation respectively, for spot blotch resistance among the RILs.

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“…Severe infections may also reach the spikes, resulting in low-weight, shrivelled grains (Kiesling 1985) with black point at the embryo end of kernels . Yield losses due to spot blotch vary from 20 to 80% in wheat (Duveiller and Gilchrist 1994) and 16-33 % in barley (Clark 1979). Spot blotch also reduces malting quality in barley (Nutter et al 1985), reducing the price of the crop (Peterson and Foster 1973).…”

Section: Introductionmentioning

confidence: 96%

A new technique for monoconidial culture of the most aggressive isolate in a given population of Bipolaris sorokiniana, cause of foliar spot blotch in wheat and barley

Kumar

Chand

Prasad

et al. 2007

World J Microbiol Biotechnol

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We developed a new technique for monoconidial culture of the most aggressive isolate in a given population of Bipolaris sorokiniana, to facilitate the evaluation of spot blotch resistance in wheat and barley. Blotched portions of infected barley leaves were placed on a glass slide in a moist chamber for production of conidia by associated fungal hyphae. Conidia were collected separately and grown on water agar discs. Individual water agar discs having conidium growth were inoculated on barley leaves. The conidium producing the earliest symptom with the largest lesion was considered most aggressive. This lesion was incubated in a moist chamber and the conidial offspring were tested for pathogenicity. When a uniform infection was observed, a small piece of the lesion was cut using a sterilized scalpel, surface sterilized with NaOCl, and inoculated in the centre of Petri dishes containing potato dextrose agar medium. The inoculated Petri dishes were incubated at 25 ± 1°C to yield monoconidial cultures of the most aggressive isolate. Variability in symptom expression caused by the most aggressive isolate of a given population was much less than variability in symptom expression caused by all isolates collectively. The techniques will be useful for plant pathologists and breeders in screening for spot blotch resistance in wheat and barley.

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Yield losses in barley cultivars caused by spot blotch

Cited by 45 publications

References 7 publications

Agronomic performance of barley cultivars in response to varying rates of swine slurry

Agronomic performance of barley cultivars in response to varying rates of swine slurry

Inheritance and identification of molecular markers associated with spot blotch (Cochliobolus sativus L.) resistance through microsatellites analysis in barley

A new technique for monoconidial culture of the most aggressive isolate in a given population of Bipolaris sorokiniana, cause of foliar spot blotch in wheat and barley

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