Abstract
Drought is one of the major abiotic stresses affecting wheat yield. A recurrent selection program was conducted to improve the drought tolerance and yield of bread wheat using drought tolerant advanced breeding lines from a drought tolerant x susceptible cross (HI 1500 x HUW 510). The parental lines were evaluated for yield, biomass and harvest index (HI) in addition to the drought adaptive traits like Canopy Temperature (CT), chlorophyll content and Normalized Difference Vegetative Index (NDVI). After three rounds of recurrent selection, the half sib progenies exhibited a marked reduction in CT, chlorophyll content and biomass; whereas improvement was noted for yield, HI and NDVI. Drought tolerance of the half-sib population appeared enhanced as indicated by drought indices and grain yield. Compared to base population, half-sibs showed better HI, grain filling and a significant (17.1%) increase in grain yield under water stress conditions. Cooler canopies and increased early vigour might have contributed to drought tolerance. A favourable combination of gibberellin sensitive and insensitive Rhtalleles was observed in the recombinant progenies. However, increased yield under water stress had a negative trade off in reduction of biomass. The study also identified potential lines with high yield and drought tolerance for subsequent varietal development for water limited areas.
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Claims 14
Claim · model-written summary
After three recurrent selection rounds, half-sib wheat progenies had reduced canopy temperature.
- Taxon
- bread wheat
Triticum aestivumt0 - Treatment
- three rounds of recurrent selectione0
- Outcome
- CTe0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After three rounds of recurrent selection, the half sib progenies exhibited a marked reduction in CT, chlorophyll content and biomass”
t0“Bread Wheat”
Claim · model-written summary
After recurrent selection, half-sib wheat progenies had reduced chlorophyll content.
- Taxon
- bread wheatTriticum aestivumt0
- Treatment
- three rounds of recurrent selectione0
- Outcome
- chlorophyll contente0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After three rounds of recurrent selection, the half sib progenies exhibited a marked reduction in CT, chlorophyll content and biomass”
t0“Bread Wheat”
Claim · model-written summary
After recurrent selection, half-sib wheat progenies had reduced biomass.
- Taxon
- bread wheatTriticum aestivumt0
- Treatment
- three rounds of recurrent selectione0
- Outcome
- biomasse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After three rounds of recurrent selection, the half sib progenies exhibited a marked reduction in CT, chlorophyll content and biomass”
t0“Bread Wheat”
Claim · model-written summary
After recurrent selection, wheat half-sibs improved in yield.
- Taxon
- bread wheatTriticum aestivumt0
- Treatment
- recurrent selectiont1
- Outcome
- yielde0
- Direction
- improvemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas improvement was noted for yield, HI and NDVI.”
t0“Bread Wheat”
t1“Recurrent Selection”
Claim · model-written summary
After recurrent selection, wheat half-sibs improved in harvest index.
- Taxon
- bread wheatTriticum aestivumt0
- Treatment
- recurrent selectiont1
- Outcome
- HIe0
- Direction
- improvemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas improvement was noted for yield, HI and NDVI.”
t0“Bread Wheat”
t1“Recurrent Selection”
Claim · model-written summary
After recurrent selection, wheat half-sibs improved in NDVI.
- Taxon
- bread wheatTriticum aestivumt0
- Treatment
- recurrent selectiont1
- Outcome
- NDVIe0
- Direction
- improvemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas improvement was noted for yield, HI and NDVI.”
t0“Bread Wheat”
t1“Recurrent Selection”
Claim · model-written summary
Drought indices indicated enhanced drought tolerance in the wheat half-sib population.
- Taxon
- bread wheatTriticum aestivumt0
- Material
- half-sib populatione0
- Outcome
- Drought tolerancee0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought tolerance of the half-sib population appeared enhanced as indicated by drought indices and grain yield.”
t0“Bread Wheat”
Claim · model-written summary
Compared with the base population, wheat half-sibs had better harvest index under water stress.
- Taxon
- bread wheatTriticum aestivumt0
- Material
- half-sibse0
- Treatment
- recurrent selectiont1
- Outcome
- HIe0
- Direction
- bettere0
- Qualifier
- under water stress conditionse0
- Comparator
- base populatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to base population, half-sibs showed better HI, grain filling and a significant (17.1%) increase in grain yield under water stress conditions.”
t0“Bread Wheat”
t1“Recurrent Selection”
Claim · model-written summary
Compared with the base population, wheat half-sibs had better grain filling under water stress.
- Taxon
- bread wheatTriticum aestivumt0
- Material
- half-sibse0
- Treatment
- recurrent selectiont1
- Outcome
- grain fillinge0
- Direction
- bettere0
- Qualifier
- under water stress conditionse0
- Comparator
- base populatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to base population, half-sibs showed better HI, grain filling and a significant (17.1%) increase in grain yield under water stress conditions.”
t0“Bread Wheat”
t1“Recurrent Selection”
Claim · model-written summary
Compared with the base population, wheat half-sib grain yield rose significantly by 17.1% under water stress.
- Taxon
- bread wheatTriticum aestivumt0
- Material
- half-sibse0
- Treatment
- recurrent selectiont1
- Outcome
- grain yielde0
- Direction
- increasee0
- Value
- 17.1%e0
- Qualifier
- under water stress conditionse0
- Comparator
- base populatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to base population, half-sibs showed better HI, grain filling and a significant (17.1%) increase in grain yield under water stress conditions.”
t0“Bread Wheat”
t1“Recurrent Selection”
Claim · model-written summary
Cooler canopies might have contributed to wheat drought tolerance.
- Taxon
- bread wheatTriticum aestivumt0
- Outcome
- drought tolerancee0
- Qualifier
- Cooler canopiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cooler canopies and increased early vigour might have contributed to drought tolerance.”
t0“Bread Wheat”
Claim · model-written summary
Increased early vigour might have contributed to wheat drought tolerance.
- Taxon
- bread wheatTriticum aestivumt0
- Outcome
- drought tolerancee0
- Qualifier
- increased early vigoure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cooler canopies and increased early vigour might have contributed to drought tolerance.”
t0“Bread Wheat”
Claim · model-written summary
Wheat recombinant progenies had a favourable combination of gibberellin sensitive and insensitive Rhtalleles.
- Taxon
- bread wheatTriticum aestivumt0
- Material
- recombinant progeniese0
- Gene
- Rhtallelese0
- Outcome
- favourable combination of gibberellin sensitive and insensitive Rhtallelese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A favourable combination of gibberellin sensitive and insensitive Rhtalleles was observed in the recombinant progenies.”
t0“Bread Wheat”
Claim · model-written summary
The study identified wheat lines with high yield and drought tolerance for varietal development in water limited areas.
- Taxon
- bread wheatTriticum aestivumt0
- Material
- potential linese0
- Outcome
- high yield and drought tolerancee0
- Qualifier
- for subsequent varietal development for water limited arease0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The study also identified potential lines with high yield and drought tolerance for subsequent varietal development for water limited areas.”
t0“Bread Wheat”