Abstract
Wheat variety PBW343, released in India in 1995, became the most widely grown cultivar in the country by the year 2000 owing to its wide adaptability and yield potential. It initially succumbed to leaf rust, and resistance genes Lr24 and Lr28 were transferred to PBW343. After an unbroken reign of about 10 years, the virulence against gene Yr27 made PBW343 susceptible to stripe rust. Owing to its wide adaptability and yield potential, PBW343 became the prime target for marker-assisted introgression of stripe rust resistance genes. The leaf rust-resistant versions formed the base for pyramiding stripe rust resistance genes Yr5, Yr10, Yr15, Yr17 , and Yr70 , in different introgression programs. Advanced breeding lines with different gene combinations, PBW665, PBW683, PBW698, and PBW703 were tested in national trials but could not be released as varieties. The genes from alien segments, Aegilops ventricosa ( Lr37/Yr17/Sr38 ) and Aegilops umbellulata ( Lr76/Yr70 ), were later pyramided in PBW343. Modified marker-assisted backcross breeding was performed, and 81.57% of the genetic background was recovered in one of the selected derivative lines, PBW723. This line was evaluated in coordinated national trials and was released for cultivation under timely sown irrigated conditions in the North Western Plain Zone of India. PBW723 yields an average of 58.0 qtl/ha in Punjab with high potential yields. The genes incorporated are susceptible to stripe rust individually, but PBW723 with both genes showed enhanced resistance. Three years post-release, PBW723 occupies approximately 8–9% of the cultivated area in the Punjab state. A regular inflow of diverse resistant genes, their rapid mobilization to most productive backgrounds, and keeping a close eye on pathogen evolution is essential to protect the overall progress for productivity and resistance in wheat breeding, thus helping breeders to keep pace with pathogen evolution.
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Claims 9
Claim · model-written summary
In modified marker-assisted backcross breeding, 81.57% of the genetic background was recovered in the derivative line PBW723.
- Taxon
- Wheat
Triticum aestivumt0 - Material
- PBW723e0
- Outcome
- genetic background was recoverede0
- Value
- 81.57%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Cultivar PBW343”
e0“81.57% of the genetic background was recovered in one of the selected derivative lines, PBW723”
Claim · model-written summary
Advanced breeding lines PBW665, PBW683, PBW698 and PBW703 with different gene combinations were tested in national trials but could not be released as varieties.
- Taxon
- WheatTriticum aestivumt0
- Material
- PBW665, PBW683, PBW698, and PBW703e0
- Outcome
- could not be released as varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Cultivar PBW343”
e0“Advanced breeding lines with different gene combinations, PBW665, PBW683, PBW698, and PBW703 were tested in national trials but could not be released as varieties”
Claim · model-written summary
PBW723 was evaluated in coordinated national trials and released for cultivation under timely sown irrigated conditions in the North Western Plain Zone of India.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- released for cultivatione0
- Setting
- North Western Plain Zone of Indiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Cultivar PBW343”
e0“This line was evaluated in coordinated national trials and was released for cultivation under timely sown irrigated conditions in the North Western Plain Zone of India”
Claim · model-written summary
PBW723 yields an average of 58.0 qtl/ha in Punjab.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Cultivar PBW343”
e0“PBW723 yields an average of 58.0 qtl/ha in Punjab”
Claim · model-written summary
The incorporated stripe rust resistance genes are susceptible to stripe rust individually.
- Taxon
- WheatTriticum aestivumt0
- Interactor
- stripe ruste0pathogen
- Outcome
- susceptible to stripe ruste0
- Qualifier
- individuallye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Cultivar PBW343”
e0“The genes incorporated are susceptible to stripe rust individually, but PBW723 with both genes showed enhanced resistance”
Claim · model-written summary
PBW723 with both genes showed enhanced resistance to stripe rust.
- Taxon
- WheatTriticum aestivumt0
- Material
- PBW723e0
- Interactor
- stripe ruste0pathogen
- Outcome
- enhanced resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Cultivar PBW343”
e0“The genes incorporated are susceptible to stripe rust individually, but PBW723 with both genes showed enhanced resistance”
Claim · model-written summary
Three years after release, PBW723 occupies approximately 8-9% of the cultivated area in Punjab state.
- Taxon
- WheatTriticum aestivumt0
- Material
- PBW723e0
- Outcome
- occupies approximately 8–9% of the cultivated areae0
- Value
- 8–9%e0
- Setting
- Punjab statee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Cultivar PBW343”
e0“Three years post-release, PBW723 occupies approximately 8–9% of the cultivated area in the Punjab state”
Claim · model-written summary
Genes from Aegilops ventricosa (Lr37/Yr17/Sr38) and Aegilops umbellulata (Lr76/Yr70) were later pyramided in PBW343.
- Taxon
- WheatTriticum aestivumt0
- Material
- PBW343e0
- Gene
- Lr37/Yr17/Sr38e0
- Outcome
- pyramidede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Cultivar PBW343”
e0“The genes from alien segments, Aegilops ventricosa ( Lr37/Yr17/Sr38 ) and Aegilops umbellulata ( Lr76/Yr70 ), were later pyramided in PBW343”
Claim · model-written summary
The authors state that a regular inflow of diverse resistant genes, rapid mobilization to productive backgrounds and monitoring of pathogen evolution is essential to protect progress for productivity and resistance in wheat breeding.
- Taxon
- wheatTriticum aestivume0
- Outcome
- regular inflow of diverse resistant genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A regular inflow of diverse resistant genes, their rapid mobilization to most productive backgrounds, and keeping a close eye on pathogen evolution is essential to protect the overall progress for productivity and resistance in wheat breeding”