GENETIC CONTROL OF VIRULENCE IN USTILAGO HORDEI III. IDENTIFICATION OF GENES FOR HOST RESISTANCE AND DEMONSTRATION OF GENE-FOR-GENE RELATIONS

1972 ◽  
Vol 14 (2) ◽  
pp. 209-213 ◽  
Author(s):  
Gurmel Sidhu ◽  
Clayton Person
Keyword(s):  
Hordeum Vulgare ◽  
Genetic Control ◽  
Host Resistance ◽  
Virulence Genes ◽  
Genetics Of Resistance ◽  
Ustilago Hordei ◽  
Dominant Characteristic ◽  
Test Cultures ◽  
Gene For Gene

The genetics of resistance of three barley varieties, Excelsior (E), Hannchen (H) and Vantage (V), was investigated against two known virulence genes (Uhv-1 and Uhv-2) present in two test cultures of Ustilago hordei. Segregations obtained from F3 progenies derived from crosses EXH and EXV revealed that resistance and susceptibility to the two test cultures were inherited independently of one another; the resistance was expressed as a dominant characteristic at both loci. The host alleles discovered through the interactions with culture UhV1UhV1Uhv2Uhv2 were designated as UhR1 and Uhr1; those revealed by interactions with culture Uhv1Uhv1UhV2UhV2 were designated as UhR2 and Uhr2. The genotype UhR1UhR1Uhr2UhV2 was thus assigned to varieties Hannchen and Vantage and UhR1Uhr1UhR2UhR2 to variety Excelsior. The interrelationships between two loci for resistance in the host and the two corresponding loci for virulence in the pathogen thus lead us to conclude that a gene-for-gene relationship also exists in the Hordeum vulgare: Ustilago hordei system.

GENETIC CONTROL OF VIRULENCE IN USTILAGO HORDEI. II. SEGREGATIONS FOR HIGHER LEVELS OF VIRULENCE

1971 ◽  
Vol 13 (2) ◽  
pp. 173-178 ◽  
Author(s):  
Gurmel Sidhu ◽  
Clayton Person
Keyword(s):  
Genetic Control ◽  
Virulence Genes ◽  
Barley Cultivars ◽  
Ustilago Hordei

Genetics of virulence of Ustilago hordei towards five barley cultivars (Excelsior, Vantage, Hannchen, Trebi and Lion) was investigated. Two genes, Uhv-1 and Uhv-2, were identified; Uhv-2 was effective on Excelsior, and Uhv-1 on both Hannchen and Vantage. The virulence genes were both recessive.

IDENTICAL GENES FOR VIRULENCE IN THE SMUTS USTILAGO HORDEI AND U. NIGRA, AND INHERITANCE OF VIRULENCE ON THE BARLEY CULTIVARS KEYSTONE AND CONQUEST

1974 ◽  
Vol 54 (2) ◽  
pp. 253-257 ◽  
Author(s):  
R. A. FULLERTON ◽  
J. NIELSEN
Keyword(s):  
Hordeum Vulgare ◽  
Virulence Genes ◽  
Recessive Gene ◽  
Breeding Program ◽  
Hordeum Vulgare L ◽  
Barley Cultivars ◽  
Ustilago Hordei

Virulence of Ustilago hordei (Pers.) Lagerh. and U. nigra Tapke on the barley (Hordeum vulgare L.) cultivars Keystone and Conquest was studied. One recessive gene or linked genes, the same in both smut species, appeared to confer virulence on both cultivars. Earlier investigators had found identical virulence genes in both species of smut for the cultivars Excelsior, Lion, Pannier and Trebi. Therefore, testing for resistance or susceptibility in a breeding program could be done with a strain of only one of the species.

scholarly journals Understanding the genetic control and physiological traits associated with rhizosheath production by barley (Hordeum vulgare)

2014 ◽  
Vol 203 (1) ◽  
pp. 195-205 ◽  
Author(s):  
Timothy S. George ◽  
Lawrie K. Brown ◽  
Luke Ramsay ◽  
Philip J. White ◽  
Adrian C. Newton ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Genetic Control ◽  
Physiological Traits

scholarly journals High‐throughput 3D modelling to dissect the genetic control of leaf elongation in barley ( Hordeum vulgare )

2019 ◽  
Vol 98 (3) ◽  
pp. 555-570 ◽  
Author(s):  
Ben Ward ◽  
Chris Brien ◽  
Helena Oakey ◽  
Allison Pearson ◽  
Sónia Negrão ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Genetic Control ◽  
High Throughput ◽  
3D Modelling ◽  
Leaf Elongation

scholarly journals Genetics of Resistance to Tetraethyllead

1979 ◽  
Vol 32 (1) ◽  
pp. 127 ◽  
Author(s):  
R Nassar
Keyword(s):  
Drosophila Melanogaster ◽  
Environmental Stress ◽  
Genetic Control ◽  
Genetics Of Resistance ◽  
Medium Selection

A Drosophila melanogaster population was exposed for 25 generations to 60 pg tetraethyllead per gram of medium. Selection over this period resulted in an increase in fecundity, hatchability and larva-to-adult viability. Chromosome assay showed that response in these traits was generally under additive genetic control in conformity with existing results in the literature on the genetics of resistance to acute environmental stress in D. melanogaster.

Sign in / Sign up

Export Citation Format

Share Document