Inheritance of resistance to Albugo candida race 2 in mustard (Brassica juncea (L.) Czern.)

Inheritance of resistance to Albugo candida race 2 in mustard (Brassica juncea (L.) Czern.)

The inheritance of resistance to white rust (Albugo Candida) race 2 in mustard (Brassica juncea) was studied in crosses involving one resistant and two susceptible cultivars. Inoculations were made in a growth chamber followed by growth of the plants under greenhouse conditions. The reaction of the...

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Bibliographic Details
Published in:Canadian journal of plant science Vol. 68; no. 2; pp. 297 - 300
Main Authors: Tiwari, A.S, Petrie, G.A, Downey, R.K
Format: Journal Article
Language:English
Published: Ottawa, ON Agricultural Institute of Canada 01-04-1988
Subjects:
Agronomy. Soil science and plant productions
Albugo candida
Biological and medical sciences
Brassica juncea
disease resistance
Fundamental and applied biological sciences. Psychology
Generalities
Genetics and breeding of economic plants
inheritance (genetics)
Pest resistance
rust diseases
Varietal selection. Specialized plant breeding, plant breeding aims
Mycosis
Phycomycetes
Artificial selection
Genotype
Phytopathogen
Fungi
Infection
Albugo candida
Resistance
Cruciferae
Dicotyledones
Angiospermae
Industrial crop
Spermatophyta
Heritability
Thallophyta
Brassica juncea
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Summary:The inheritance of resistance to white rust (Albugo Candida) race 2 in mustard (Brassica juncea) was studied in crosses involving one resistant and two susceptible cultivars. Inoculations were made in a growth chamber followed by growth of the plants under greenhouse conditions. The reaction of the F 1 was like the resistant parent, indicating that resistance is dominant and controlled by nuclear genes. Backcrosses of F 1 plants to the resistant parent showed the same reactions as that of the resistant parent. Backcrosses of F 1 to the susceptible parents segregated in a 1:1 ratio of resistant to susceptible. The F 2 segregation of resistant and susceptible plants gave a good fit to a 3:1 ratio. The study revealed that resistance is monogenic and could be easily transferred to adapted susceptible genotypes via backcrossing.Key words: Brassica juncea, Albugo Candida, mustard, white rust
ISSN:0008-4220
1918-1833
DOI:10.4141/cjps88-039