Abstract
Genetic improvement for nitrogen use efficiency (NUE) can play a very crucial role in sustainable agriculture. Root traits have hardly been explored in major wheat breeding programs, more so in spring germplasm, largely because of the difficulty in their scoring. A total of 175 advanced/improved Indian spring wheat genotypes were screened for root traits and nitrogen uptake and nitrogen utilization at varying nitrogen levels in hydroponic conditions to dissect the complex NUE trait into its component traits and to study the extent of variability that exists for those traits in Indian germplasm. Analysis of genetic variance showed a considerable amount of genetic variability for nitrogen uptake efficiency (NUpE), nitrogen utilization efficiency (NUtE), and most of the root and shoot traits. Improved spring wheat breeding lines were found to have very large variability for maximum root length (MRL) and root dry weights (RDW) with strong genetic advance. In contrast to high nitrogen (HN), a low nitrogen (LN) environment was more effective in differentiating wheat genotypes for NUE and its component traits. Shoot dry weight (SDW), RDW, MRL, and NUpE were found to have a strong association with NUE. Further study revealed the role of root surface area (RSA) and total root length (TRL) in RDW formation as well as in nitrogen uptake and therefore can be targeted for selection to further the genetic gain for grain yield under high input or sustainable agriculture under limited inputs.
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Claims 6
Claim · model-written summary
Spring wheat genotypes had substantial genetic variability for nitrogen uptake and utilization efficiencies and most root and shoot traits.
- Taxon
- Spring Wheat
Triticum aestivumt0 - Material
- spring wheatt0
- Outcome
- nitrogen uptake efficiency (NUpE), nitrogen utilization efficiency (NUtE), and most of the root and shoot traitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of genetic variance showed a considerable amount of genetic variability for nitrogen uptake efficiency (NUpE), nitrogen utilization efficiency (NUtE), and most of the root and shoot traits.”
t0“Spring Wheat”
Claim · model-written summary
Improved spring wheat lines had very large variability and strong genetic advance for maximum root length and root dry weight.
- Taxon
- Spring WheatTriticum aestivumt0
- Material
- Improved spring wheat breeding linese0
- Outcome
- maximum root length (MRL) and root dry weights (RDW)e0
- Qualifier
- strong genetic advancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Improved spring wheat breeding lines were found to have very large variability for maximum root length (MRL) and root dry weights (RDW) with strong genetic advance.”
t0“Spring Wheat”
Claim · model-written summary
Low nitrogen differentiated wheat genotypes for NUE and its components more effectively than high nitrogen.
- Taxon
- wheatTriticum aestivume0
- Treatment
- low nitrogen (LN) environmente0
- Outcome
- differentiating wheat genotypes for NUE and its component traitse0
- Direction
- more effectivee0
- Comparator
- high nitrogen (HN)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In contrast to high nitrogen (HN), a low nitrogen (LN) environment was more effective in differentiating wheat genotypes for NUE and its component traits.”
Claim · model-written summary
Shoot dry weight, root dry weight, maximum root length, and nitrogen uptake efficiency were strongly associated with NUE.
- Taxon
- Spring WheatTriticum aestivumt0
- Material
- spring wheatt0
- Organ / stage
- Shoote0
- Outcome
- NUEe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight (SDW), RDW, MRL, and NUpE were found to have a strong association with NUE.”
t0“Spring Wheat”
Claim · model-written summary
Root surface area and total root length contributed to root dry weight formation and nitrogen uptake.
- Taxon
- Spring WheatTriticum aestivumt0
- Organ / stage
- roote0
- Outcome
- RDW formation as well as in nitrogen uptakee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Further study revealed the role of root surface area (RSA) and total root length (TRL) in RDW formation as well as in nitrogen uptake”
t0“Spring Wheat”
Claim · model-written summary
Root surface area and total root length could be targeted for selection to improve yield under high inputs or sustainable agriculture under limited inputs.
- Taxon
- Spring WheatTriticum aestivumt0
- Outcome
- targeted for selection to further the genetic gain for grain yielde0
- Qualifier
- under high input or sustainable agriculture under limited inputse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“therefore can be targeted for selection to further the genetic gain for grain yield under high input or sustainable agriculture under limited inputs.”
t0“Spring Wheat”
The same questions in other papers
nitrogen · nutrient: efficiency · Triticum aestivum (wheat)Results differ
126 papers in the same direction as this paper · 45 in the opposite direction · 2 reporting no difference from an alternative
- positive
- negative
- negative
170 papers more in this group
See all 174 papers →climate site · nutrient: efficiency · Triticum aestivum (wheat)Positive and negative results
1 in the opposite direction
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.