Pathogenic races of Tilletia laevis - the causal agent of wheat common bunt in Iran
Mardoukhi, V.
Pathogenic races of Tilletia laevis - the causal agent of wheat common bunt in Iran - Tbilisi (Georgia) CIMMYT : 2004 - p. 271 - Printed
Abstract only
To identify races of Tilletia laevis, several infected samples of wheat were collected from important wheat grown areas of Iran. Seeds of the differential monogenic and oligogenic lines were artificially infected with teliospores of different samples and grown in the field. At harvesting time, percentage of infected spikes was assessed for each line, and races of each sample were determined using standard method. According to the results, five isolates which were virulent to Bt7 were determined as race L-l , four isolates having virulence on Bt2 and Bt7 determined as L-3, two isolates with virulence on Btl and Bt7 determined as L-4, eight isolates virulent on Bt2, Bt3and Bt7 determined as L-I0 and one isolate with virulence on Bt2, Bt3, Bt4, Bt6 and Bt7 as race L-17 . Genes Bt2, Bt3, Bt7 were susceptible to the most of isolates therefore are not recommended to be used in breeding programs, Bt8, Bt9, Bt13 were susceptible to some isolates. Genes Btl , Bt4, Bt6 (except one race), Bt5, Btl0, Bt11, Bt12, Bt14 and Btp were resistant to all identified races; these genes will be effective for development of resistant cultivars in different parts of the country.
English
Breeding
Genetic resistance
Infection
Iran
Isolation techniques
Plant diseases
Tilletia indica
Virulence
Wheat
CIMMYT
633.1147 / BED
Pathogenic races of Tilletia laevis - the causal agent of wheat common bunt in Iran - Tbilisi (Georgia) CIMMYT : 2004 - p. 271 - Printed
Abstract only
To identify races of Tilletia laevis, several infected samples of wheat were collected from important wheat grown areas of Iran. Seeds of the differential monogenic and oligogenic lines were artificially infected with teliospores of different samples and grown in the field. At harvesting time, percentage of infected spikes was assessed for each line, and races of each sample were determined using standard method. According to the results, five isolates which were virulent to Bt7 were determined as race L-l , four isolates having virulence on Bt2 and Bt7 determined as L-3, two isolates with virulence on Btl and Bt7 determined as L-4, eight isolates virulent on Bt2, Bt3and Bt7 determined as L-I0 and one isolate with virulence on Bt2, Bt3, Bt4, Bt6 and Bt7 as race L-17 . Genes Bt2, Bt3, Bt7 were susceptible to the most of isolates therefore are not recommended to be used in breeding programs, Bt8, Bt9, Bt13 were susceptible to some isolates. Genes Btl , Bt4, Bt6 (except one race), Bt5, Btl0, Bt11, Bt12, Bt14 and Btp were resistant to all identified races; these genes will be effective for development of resistant cultivars in different parts of the country.
English
Breeding
Genetic resistance
Infection
Iran
Isolation techniques
Plant diseases
Tilletia indica
Virulence
Wheat
CIMMYT
633.1147 / BED