Abstract
Blast, also known as leaf spot, caused by Pyricularia grisea (teleomorph: Magnaporthe grisea), has emerged as a serious disease affecting both forage and grain production in pearl millet in India. Pathogenic variation was studied in a greenhouse using 25 M. grisea isolates collected from four major pearl-millet-growing states in India (Rajasthan, Haryana, Maharashtra, and Uttar Pradesh) on 10 pearl millet genotypes (ICMB 02444, ICMB 02777, ICMB 06444, ICMB 93333, ICMB 96666, ICMB 97222, ICMB 99444, 863B, ICMR 06222, and ICMB 95444). Differential reactions to the test isolates were recorded on ICMB 02444, ICMB 93333, ICMB 97222, 863B, and ICMR 06222. The 25 isolates were grouped into five different pathotypes based on their reaction types (virulent = score ≥ 4 and avirulent = score ≤ 3 on a 1-to-9 scale). For the identification of resistance sources, a pearl millet mini-core comprising 238 accessions was evaluated under greenhouse conditions against five M. grisea isolates (Pg118, Pg119, Pg56, Pg53, and Pg45) representing the five pathotypes. Of 238 accessions, 32 were found to be resistant to at least one pathotype. Resistance to multiple pathotypes (two or more) was recorded in several accessions, while three accessions (IP 7846, IP 11036, and IP 21187) exhibited resistance to four of the five pathotypes. Four early-flowering (≤50 days) blast-resistant mini-core accessions (IP 7846, IP 4291, IP 15256, and IP 22449) and four accessions (IP 5964, IP 11010, IP 13636, and IP 20577) having high scores (≥7) for grain and green fodder yield potential and overall plant aspect were found to be promising for utilization in pearl millet improvement programs. Identification of five pathotypes of M. grisea and sources of resistance to these pathotypes will provide a foundation for breeding for blast resistance in pearl millet in India.
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Claims 9
Claim · model-written summary
Five pearl millet genotypes showed differential reactions to tested isolates.
- Taxon
- pearl millet
Cenchrus americanust0 - Material
- ICMB 02444, ICMB 93333, ICMB 97222, 863B, and ICMR 06222e0
- Interactor
- Magnaporthe grisea
Pyricularia griseat0pathogen - Outcome
- Differential reactions to the test isolatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differential reactions to the test isolates were recorded on ICMB 02444, ICMB 93333, ICMB 97222, 863B, and ICMR 06222”
t0“Pearl Millet Blast Pathogen Magnaporthe grisea”
Claim · model-written summary
The 25 isolates were grouped into five pathotypes by reactions on pearl millet.
- Taxon
- pearl milletCenchrus americanust0
- Interactor
- Magnaporthe griseaPyricularia griseat0pathogen
- Outcome
- five different pathotypese0
- Value
- fivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 25 isolates were grouped into five different pathotypes based on their reaction types”
t0“Pearl Millet Blast Pathogen Magnaporthe grisea”
Claim · model-written summary
Thirty-two of 238 accessions resisted at least one pathotype.
- Taxon
- pearl milletCenchrus americanust0
- Interactor
- Magnaporthe griseaPyricularia griseat0pathogen
- Outcome
- resistant to at least one pathotypee0
- Value
- 32e0
- Qualifier
- Of 238 accessionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of 238 accessions, 32 were found to be resistant to at least one pathotype”
t0“Pearl Millet Blast Pathogen Magnaporthe grisea”
Claim · model-written summary
Several accessions resisted multiple pathotypes.
- Taxon
- pearl milletCenchrus americanust0
- Interactor
- Magnaporthe griseaPyricularia griseat0pathogen
- Outcome
- Resistance to multiple pathotypese0
- Qualifier
- two or moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resistance to multiple pathotypes (two or more) was recorded in several accessions”
t0“Pearl Millet Blast Pathogen Magnaporthe grisea”
Claim · model-written summary
IP 7846 resisted four of five pathotypes.
- Taxon
- pearl milletCenchrus americanust0
- Material
- IP 7846e0
- Interactor
- Magnaporthe griseaPyricularia griseat0pathogen
- Outcome
- resistance to four of the five pathotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“three accessions (IP 7846, IP 11036, and IP 21187) exhibited resistance to four of the five pathotypes”
t0“Pearl Millet Blast Pathogen Magnaporthe grisea”
Claim · model-written summary
IP 11036 resisted four of five pathotypes.
- Taxon
- pearl milletCenchrus americanust0
- Material
- IP 11036e0
- Interactor
- Magnaporthe griseaPyricularia griseat0pathogen
- Outcome
- resistance to four of the five pathotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“three accessions (IP 7846, IP 11036, and IP 21187) exhibited resistance to four of the five pathotypes”
t0“Pearl Millet Blast Pathogen Magnaporthe grisea”
Claim · model-written summary
IP 21187 resisted four of five pathotypes.
- Taxon
- pearl milletCenchrus americanust0
- Material
- IP 21187e0
- Interactor
- Magnaporthe griseaPyricularia griseat0pathogen
- Outcome
- resistance to four of the five pathotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“three accessions (IP 7846, IP 11036, and IP 21187) exhibited resistance to four of the five pathotypes”
t0“Pearl Millet Blast Pathogen Magnaporthe grisea”
Claim · model-written summary
Four early-flowering blast-resistant accessions were identified as promising for improvement.
- Taxon
- pearl milletCenchrus americanuse0
- Material
- IP 7846, IP 4291, IP 15256, and IP 22449e0
- Outcome
- promising for utilization in pearl millet improvement programse0
- Qualifier
- early-flowering (≤50 days) blast-resistante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four early-flowering (≤50 days) blast-resistant mini-core accessions (IP 7846, IP 4291, IP 15256, and IP 22449) and four accessions (IP 5964, IP 11010, IP 13636, and IP 20577) having high scores (≥7) for grain and green fodder yield potential and overall plant aspect were found to be promising for utilization in pearl millet improvement programs”
Claim · model-written summary
Four accessions with high yield-potential and plant-aspect scores were identified as promising for improvement.
- Taxon
- pearl milletCenchrus americanuse0
- Material
- IP 5964, IP 11010, IP 13636, and IP 20577e0
- Outcome
- promising for utilization in pearl millet improvement programse0
- Qualifier
- high scores (≥7) for grain and green fodder yield potential and overall plant aspecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four accessions (IP 5964, IP 11010, IP 13636, and IP 20577) having high scores (≥7) for grain and green fodder yield potential and overall plant aspect were found to be promising for utilization in pearl millet improvement programs”