scholarly journals Ustilago nuda hordei

2020 ◽  
Author(s):  
Keyword(s):  
Ustilago Nuda

Reaction of Hordeum species to the smut fungi Ustilago nuda and U. tritici

1987 ◽  
Vol 65 (10) ◽  
pp. 2024-2027 ◽  
Author(s):  
J. Nielsen
Keyword(s):  
Hordeum Chilense ◽  
Smut Fungi ◽  
New Hosts ◽  
Cultivated Barley ◽  
Ustilago Nuda ◽  
Hordeum Species ◽  
Eleven Species

Eleven species of Hordeum were tested for their reaction to Ustilago nuda (Jens.) Rostr. and U. tritici (Pers.) Rostr., the causes of the embryo-infecting loose smuts of cultivated barley and wheat, respectively. The species Hordeum chilense and H. depressum were resistant, while H. euclaston, H. halophilum, H. procerum, H. pusillum, and H. stenostachys were susceptible to both fungi. Hordeum muticum was susceptible only to U. nuda, while H. arizonicum, H. lechleri, and H. roshevitzii were susceptible only to U. tritici. The susceptible species are new hosts for these pathogens. It is proposed that these results, together with those of an earlier study, indicate that U. nuda evolved from U. tritici.

THE RELATIONSHIP BETWEEN KERNEL LOCATION, KERNEL SIZE AND THE INCIDENCE OF LOOSE SMUT IN BARLEY

1963 ◽  
Vol 43 (1) ◽  
pp. 88-93 ◽  
Author(s):  
Ahmet Demirlicakmak ◽  
M. L. Kaufmann
Keyword(s):  
Artificial Inoculation ◽  
Loose Smut ◽  
Kernel Size ◽  
Ustilago Nuda ◽  
The Relationship

The association between the incidence of loose smut (Ustilago nuda) and kernel location in 6-rowed barley was studied. With artificial inoculation, kernels from the upper portion of the spike yielded the highest incidence of loose smut. Central and lateral kernels yielded similar numbers of smutted plants.With naturally infected seeds, lateral kernels produced more smutted plants than central ones. The percentage of infected seeds from the upper, middle, and lower portions of the spike varied from sample to sample.Within individual samples of nine 6-rowed varieties of barley small seeds generally produced more infected plants than large or medium-sized seeds. Since lateral kernels are normally smaller than central kernels, these results supported previous findings that the former are more subject to loose smut infection than the latter.

Resistenzeigenschaften im Gersten- und Weizensortiment Gatersleben 20. Prüfung des Verhaltens von Gersten gegen Flugbrand,Ustilago nuda (Jens.) Rostr.

1976 ◽  
Vol 24 (1) ◽  
pp. 237-247 ◽  
Author(s):  
Ilse Nover ◽  
Christian O. Lehmann ◽  
Anneliese Seidenfaden
Keyword(s):  
Ustilago Nuda

IDENTIFICATION OF RESISTANCE GENES IN BARLEY BY REACTIONS TO USTILAGO NUDA

1969 ◽  
Vol 49 (4) ◽  
pp. 447-451 ◽  
Author(s):  
J. G. Moseman ◽  
D. R. Metcalfe
Keyword(s):  
Hordeum Vulgare ◽  
Resistance Genes ◽  
Smut Fungus ◽  
Loose Smut ◽  
Hordeum Vulgare L ◽  
Race 1 ◽  
Ustilago Nuda ◽  
Race 2 ◽  
Or Genes ◽  
Similar Gene

The reactions of 18 cultivars and selections of barley, Hordeum vulgare L., to inoculations with three cultures of the loose smut fungus, Ustilago nuda (Jens.) Rostr., were determined. The following conclusions were derived by analyzing the reactions of cultivars Jet (CI 967) and Milton (CI 4966) and derivatives from them to inoculations with cultures 244 of race 2, 49-70 of race 2, and 10 of race 1. Jet was shown to have two genes, Un3 and Un6, and Milton, one gene, Un8. Derivatives from Jet with only gene Un6 were distinguished from those with genes Un3 and Un6. Five host selections known to have a gene or genes at the same locus as Jet were shown to have gene Un6 or a similar gene at that locus.

THE INFLUENCE OF AGING OF SEED ON THE DEVELOPMENT OF LOOSE SMUT IN BARLEY

1961 ◽  
Vol 39 (7) ◽  
pp. 1741-1746 ◽  
Author(s):  
R. C. Russell
Keyword(s):  
Close Correlation ◽  
Barley Seed ◽  
Loose Smut ◽  
Average Amount ◽  
Average Percentage ◽  
Ustilago Nuda ◽  
Time Required ◽  
Growing Crop ◽  
Aged Seeds

For several years after their production, 15 stocks of barley seed, infected with Ustilago nuda (Jens.) Rostr., produced approximately the same average percentage of smutted plants in growth tests as the average percentage of infected embryos found in the seed. As the seed became older, this was no longer true. Some samples produced less smut after six years, while others continued to produce similar amounts up to the ninth year, but eventually all samples produced decidedly lower percentages of smut. The average percentage of smutted plants in crops grown from these samples became less with each succeeding year after the sixth in nearly all instances. In the stocks of barley seed studied, the average amount of smut in the growing crop declined from about 14% initially to only 3.2% at the end of the 11-year period.The main reason for the decline in percentage infection was the successively larger proportions of infected seeds that failed to germinate as the seed became aged, as compared with the slower loss of viability in the healthy seeds. A close correlation was found between the length of time required for aged seeds to germinate and the percentage of such seeds carrying smut in their embryos.

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