scholarly journals Cytogenetical Studies in Wheat. IX. Monosomic Analyses, Telocentric Mapping and Linkage Relationships of Genes Sr21, Pm4 and Mle

1979 ◽  
Vol 32 (1) ◽  
pp. 115 ◽  
Author(s):  
TT The ◽  
RA McIntosh ◽  
Fiona GA Bennett
Keyword(s):  
Gene Duplication ◽  
Triticum Monococcum ◽  
Diploid Wheat ◽  
Puccinia Graminis ◽  
Puccinia Graminis Tritici ◽  
Differential Transmission ◽  
Telocentric Mapping ◽  
Linkage Relationships ◽  
Derivatives Of

Gene Sr21 for resistance to Puccinia graminis tritici in five hexaploid derivatives of the diploid Triticum monococcum was located in chromosome 2A. Since only one chromosome was involved in resistance, abnormal ratios found in some diploid wheat crosses and in one hexaploid derivative were attributed to differential transmission of gametes rather than to gene duplication in the diploid wheat sources. By using 2AS and an unknown telocentric presumed to be 2AL in telocentric mapping, Sr21 was placed 2�4�0�9 recombination units from the centromere in 2AL.

INHERITANCE OF STEM RUST RESISTANCE TRANSFERRED FROM DIPLOID WHEAT (TRITICUM MONOCOCCUM) TO TETRAPLOID AND HEXAPLOID WHEAT AND CHROMOSOME LOCATION OF THE GENE INVOLVED

1973 ◽  
Vol 15 (3) ◽  
pp. 397-409 ◽  
Author(s):  
E. R. Kerber ◽  
P. L. Dyck
Keyword(s):  
Stem Rust ◽  
Infection Type ◽  
Dominant Gene ◽  
Stem Rust Resistance ◽  
Triticum Monococcum ◽  
Diploid Wheat ◽  
Puccinia Graminis ◽  
Genetic Studies ◽  
A Genome ◽  
Differential Transmission

Resistance to stem rust (Puccinia graminis Pers. f. sp. tritici Eriks. and and E. Henn.) was transferred from diploid wheat, Triticum monococcum L. cv. RL 5244, to Stewart tetraploid and Marquis hexaploid cultivars by interspecific hybridization. Genetic studies at the diploid, tetraploid and hexaploid levels indicated that a dominant gene gave resistance to the seven races of rust tested. Differential transmission of this gene was noted in some of the intradiploid and intrahexaploid crosses. The degree of resistance, as indicated by infection type, decreased with increasing levels of ploidy. This newly identified gene, designated Sr22, is located on chromosome 7A and is different from resistance genes Sr8, Sr13 and Sr15, which are also on chromosomes of the A genome.

scholarly journals De Novo Transcriptome Assembly and Analyses of Gene Expression during Photomorphogenesis in Diploid Wheat Triticum monococcum

PLoS ONE ◽  
2014 ◽  
Vol 9 (5) ◽  
pp. e96855 ◽  
Author(s):  
Samuel E. Fox ◽  
Matthew Geniza ◽  
Mamatha Hanumappa ◽  
Sushma Naithani ◽  
Chris Sullivan ◽  
...  
Keyword(s):  
Gene Expression ◽  
De Novo ◽  
Transcriptome Assembly ◽  
Triticum Monococcum ◽  
Diploid Wheat ◽  
De Novo Transcriptome Assembly ◽  
De Novo Transcriptome

Epidemiology of Puccinia graminis f.sp. tritici-Ug99 in the Rift Valley “Flyway” from Uganda-Kenya to Yemen

2012 ◽  
Vol 13 (1) ◽  
pp. 31 ◽  
Author(s):  
Subrahmaniam Nagarajan ◽  
Hans J. Kogel ◽  
Jan C. Zadoks
Keyword(s):  
Rift Valley ◽  
Puccinia Graminis ◽  
Puccinia Graminis Tritici ◽  
Wheat Cultivation

Dispersal of a new virulence of Puccinia graminis tritici (Pgt)-Ug99 from Uganda-Kenya to Yemen, over >1000 km, happened in four years. Geo-agro-ecology of wheat cultivation and the epidemiology of Pgt indicate that the Rift Valley is a natural conduit “flyway.” The widely prevalent “green bridges” favor survival and spread of Pgt. This part of the Rift Valley is one single epidemiological zone, and the annual Pgt build-up is from the endogenous inoculum. Accepted for publication 18 October 2012. Published 14 November 2012.

scholarly journals A Third Factor for Resistance to Puccinia graminis Tritici

Nature ◽  
1945 ◽  
Vol 155 (3929) ◽  
pp. 205-205
Author(s):  
I. A. WATSON ◽  
W. L. WATERHOUSE
Keyword(s):  
Puccinia Graminis ◽  
Puccinia Graminis Tritici

STUDIES ON THE NATURE OF RUST RESISTANCE IN WHEAT: VI. EFFECT OF HYDROGEN ION CONCENTRATION, PHENOLIC COMPOUNDS, AND HOST EXTRACTS ON THE GERMINATION OF UREDINIOSPORES OF PUCCINIA GRAMINIS TRITICI, FORM 21

1934 ◽  
Vol 11 (6) ◽  
pp. 667-686 ◽  
Author(s):  
J. Ansel Anderson
Keyword(s):  
Phenolic Compounds ◽  
Rust Resistance ◽  
Hydrogen Ion ◽  
Ion Concentration ◽  
Puccinia Graminis ◽  
Inhibitory Effects ◽  
Hydrogen Ion Concentration ◽  
Puccinia Graminis Tritici ◽  
The Press ◽  
Germ Tubes

Urediniospores of Puccinia graminis tritici, form 21, were sown on buffer solutions covering the range from pH 3 to pH 8. Maximum germination was obtained between pH 5.8 and 6.5, with indications that if the point of maximum germination could be determined with precision it would be found to lie in the neighborhood of pH 6.2.The effect of buffered and unbuffered solutions of pure phenolic compounds on the germination of urediniospores was studied. Greater inhibition was obtained with unbuffered solutions owing to the additional effect of hydrogen ion concentration. In buffered solutions, at pH 6.0, germination was prevented by 45 p.p.m. of hydroquinone, 125 of o-cresol, 180 of anisic acid, 250 of benzoic acid, 340 of catechol, 400 of guaiacol and 600 of phenol. A number of other compounds were also studied. The inhibitory effects of compounds, of which the bactericidal effects are known, are fairly closely related to their bactericidal efficiency.Investigations were made of the inhibitory effects on spore germination and the growth of germ tubes, of aqueous dilutions of 15, 10, 5 and 2.5% of the press-juice of Vernal, Khapli, Marquis and Little Club wheats. Statistical treatment of the data accumulated in ten series of determinations, in which a total of 160,000 spores was counted, showed that significant differences occurred between varieties and that variations in the total solid content and hydrogen ion concentration of the press-juice had no consistent effect upon the results. Although the results were not entirely clear-cut, it is concluded that the varieties fall in the following order with respect to increasing inhibitory effect of their extracts: Vernal, Marquis, Khapli and Little Club. Since Vernal and Khapli are resistant to form 21 whereas Marquis and Little Club are susceptible, the results fail to show any relationship between the effects of host extracts on the germination of urediniospores, or on the growth of germ tubes, and the rust resistance of the variety.

Sign in / Sign up

Export Citation Format

Share Document