Components of Resistance to Fusarium Ear Rot in Field Corn

Gendloff, E. H.; Rossman, E. C.; Casale, W. L.; Isleib, T. G.; Hart, L. P.

doi:10.1094/phyto-76-684

Cited by 33 publications

(25 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mesterhazy (1989) reported for artificial inoculation of Hungarian maize materials with E gram# nearum that hybrid performance could not be predicted on the basis of line per se performance for cob rot. These findings are contradictory to results with U.S.-maize materials (Hart et al, 1984;Gendloff et al, 1986) and illustrate the importance of material effects in this pathosystem.…”

Section: Discussioncontrasting

confidence: 99%

“…Also for resistance of winter rye to Erysiphe graminis (Schmidt, 1991) and to foot rot inducing pathogens (Ludwig, 1992), GCA effects were predominant. Similar studies in maize with E graminearum (Hart et al, 1984;Gendloff et al, 1986) and in wheat with E culmorum (Snijders, 1990b) also implicated additivity as the main genetic effect. In U.S.-materials, the reaction of maize single crosses to infection by E grarninearum could be predicted on the basis of the parental inbred reaction (Hart et al, 1984).…”

Section: Discussionmentioning

confidence: 56%

See 1 more Smart Citation

Genetic analysis of inbred lines and their crosses for resistance to head blight (Fusarium culmorum, F. graminearum) in winter rye

1992

View full text Add to dashboard Cite

For genetic analysis of head blight in winter rye (Secale cereale) caused by Fusarium culmorum, six homozygous inbred lines from the Petkus gene pool were crossed in all combinations to obtain 15 diallel F 1 crosses and the corresponding 15 F 2 crosses. These materials and 10 additional inbreds were artificially inoculated in a 2-year field experiment. The inbreds were also tested with E graminearum in a separate sub-experiment.Single disease rating, average disease rating, and yield components (grain-weight per spike, 1000-grain weight, kernel number per spike) relative to the non-inoculated treatment were significantly affected by Fusarium head blight in all material groups. The relative grain weight per spike ranged from 26% to 88%. Significant genotypic and genotype x year interaction variances were found throughout. Heritabilities were highest for homogeneous inbreds (h 2 = 0.6-0.8) and lowest for heterogeneous F 2 crosses (h 2 = 0.4-0.6). Disease rating and relative grain-weight per spike were highly correlated for the inbreds and F 2 crosses (r =0.7, P< 0.01), but lower for the F~ crosses (r = 0.6, P < 0.05). Inter-annual correlation coefficients for disease ratings and relative grain-weight per spike ranged from r =0.7 (inbreds) to r =0.5 (F 2 crosses). The diallel analysis showed significant GCA effects only for relative 1000-grain weight in 1990, but significant SCA and SCAx year interaction variances for most traits. The resistances of 16 inbreds to E culmorum and E graminearum were tightly associated for all traits (r= 0.96-0.97, P _<0.01).In conclusion, only slow progress can be expected from selecting for Fusarium head blight resistance in rye due to the limited amount of additive genetic variance and the great importance of environmental factors.

show abstract

Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 56%

Genetic analysis of inbred lines and their crosses for resistance to head blight (Fusarium culmorum, F. graminearum) in winter rye

1992

View full text Add to dashboard Cite

show abstract

“…Resistance to Fusarium is of the quantitative type and the ranking order in resistance is not greatly affected by strain or even species of Fusarium (Gendloff et al, 1986;Mesterhazy, 1982Mesterhazy, , 1989Teich, 1989;Chungu et al, 1996;Nankam & Pataky, 1996). However, small cultivar × site (Hunter et al, 1986) and even cultivar × Fusarium isolate interactions (Atlin et al, 1983;Gendloff et al, 1986) have been reported. These interactions may be caused by the fact that fumosin production is also dependent on environmental conditions (Shelby et al, 1994).…”

Section: Discussionmentioning

confidence: 99%

Fusarium ear rot and how to screen for resistance in open pollinated maize in the Andean regions

et al. 2006

View full text Add to dashboard Cite

Ears infected with ear rot were collected from five provinces in Ecuador. Of the 44 samples analysed 26 carried Fusarium verticillioides, 11 F. subglutinans, two F. graminearum and five carried fungi different from Fusarium. The pathogenicity of ten isolates, seven of F. verticillioides and three of F. subglutinans, were tested. Per isolate 30 ears of the susceptible cultivar Mishca were inoculated by pricking a steel pin, dipped into a spore suspension, through the husks in the central part of the ear 14 days after mid-silk. Ears inoculated with sterile water and ears without any treatment, natural infection, served as controls. The disease severity (DS) of the ears ranged from 14 to 58% ear rot, the range being similar for both species. The DS of the water control, 19%, was much higher than that of the natural control of 2%. Five strains gave a DS of In a series of experiments the effect of various methods of applying Fusarium spores through the husks into young ears were compared. All tested methods resulted in DSs significantly higher than those of the two controls. Inoculation with tooth picks and steel pins dipped in a spore suspension gave similar ear rot percentages. Inoculations at 7 to 14 days after mid-silk produced the highest DS's. There was no significant effect of spore concentration on the DS. Cultivars differed considerably, the range being from around 20% to over 50%. Surprisingly, only wounding the husks, the sterile water control, resulted in a fairly high DS, much higher than that of the natural control. As the ranking order of the cultivars after wounding only and after inoculation did not seem to be different from the ranking order of the natural control it is suggested to use in areas with high inoculum pressures like the Andes only wounding by means of a steel pin for screening for resistance to maize ear rot.

show abstract

“…Tex6 and MI82 (Naidoo et al, 2002;Windham and Williams, 2002) were proposed as potential sources of resistance. Corn cultivars resistant against F. verticillioides infection have also been identified (Gendlof et al, 1986).…”

Section: Resistance Breedingmentioning

confidence: 99%

Novel strategies to control mycotoxins in feeds: A review

Varga

Töth

2005

Acta Veterinaria Hungarica

View full text Add to dashboard Cite

Mycotoxin-producing fungi may contaminate agricultural products in the field (preharvest spoilage), during storage (postharvest spoilage), or during processing. Mycotoxin contamination of foods and feeds poses serious health hazard to animals and humans. For lowering mycotoxin contamination of feeds and foods, several strategies have been investigated that can be divided into biological, chemical and physical methods. This paper gives an overview of strategies which are promising with regard to lowering the mycotoxin burden of animals and humans.

show abstract

Components of Resistance to Fusarium Ear Rot in Field Corn

Cited by 33 publications

References 0 publications

Genetic analysis of inbred lines and their crosses for resistance to head blight (Fusarium culmorum, F. graminearum) in winter rye

Genetic analysis of inbred lines and their crosses for resistance to head blight (Fusarium culmorum, F. graminearum) in winter rye

Fusarium ear rot and how to screen for resistance in open pollinated maize in the Andean regions

Novel strategies to control mycotoxins in feeds: A review

Contact Info

Product

Resources

About