Abstract
Nitrogen (N) is one of the primary macronutrients required for crop growth and yield. This nutrient is especially limiting wheat yields in the dry and low fertile agro-ecologies having low N in the root zone soil strata. Moreover, majority of farmers in India and South Asia are small to marginal with meagre capacity to invest in costly nitrogen fertilizers. Therefore, there is an immense need to identify lines that use nitrogen efficiently. A set of 50 diverse wheat genotypes consisting of indigenous germplasm lines (05), cultivars released for commercial cultivation (23) and selected elite lines from CIMMYT nurseries (22) were evaluated in an alpha-lattice design with two replications, a six-rowed plot of 2.5m length for 24 agro morphological, physiological and NUE related traits during two consecutive crop seasons in an N-depleted precision field under two different N levels of 50%-N50 (T1) and 100%-N100 (T2) of recommended N, i.e., 100 kg/ha. Analysis of variance revealed significant genetic variation among genotypes for all the traits studied. About 11.36% yield reduction was observed at reduced N levels. Significant correlations among NUE traits and yield component traits were observed which indicated pivotal role of N remobilization to the grain in enhancing yield levels. Among N-insensitive genotypes identified based on their yielding ability at low N levels, UASBW13356, UASBW13358, UASBW13354, UASBW13357 and KRL1-4 showed their inherent genotypic plasticity toward N application. The genotypes with more yield and high to moderate NUtE can be used as parents for the breeding of N efficient genotypes for marginal agro-ecologies. Low N tolerant genotypes identified from the current investigation may be further utilized in the identification of genomic regions responsible for NUE and its deployment in wheat breeding programs. The comprehensive data of 24 traits under different nitrogen levels for diverse genotypes from India and global sources (mainly CIMMYT) should be useful for supporting breeding for NUE and thus will be of great help for small and marginal farmers in India and South Asia.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Wheat genotypes varied significantly for all studied traits.
- Taxon
- wheat
Triticum aestivumt0 - Outcome
- genetic variation among genotypes for all the traits studiede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of variance revealed significant genetic variation among genotypes for all the traits studied”
t0“wheat”
Claim · model-written summary
Reduced nitrogen lowered yield by about 11.36%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- reduced N levelse0
- Outcome
- yielde0
- Direction
- reductione0
- Value
- 11.36%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“About 11.36% yield reduction was observed at reduced N levels”
t0“wheat”
Claim · model-written summary
NUE traits and yield component traits were significantly correlated.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- correlations among NUE traits and yield component traitse0
Not reportedMaterialDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant correlations among NUE traits and yield component traits were observed”
t0“wheat”
Claim · model-written summary
Five genotypes were identified as N-insensitive based on yield at low N.
- Taxon
- wheatTriticum aestivumt0
- Material
- UASBW13356, UASBW13358, UASBW13354, UASBW13357 and KRL1-4e0
- Outcome
- genotypic plasticity toward N applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among N-insensitive genotypes identified based on their yielding ability at low N levels, UASBW13356, UASBW13358, UASBW13354, UASBW13357 and KRL1-4 showed their inherent genotypic plasticity toward N application”
t0“wheat”
Claim · model-written summary
High yielding genotypes with high to moderate NUtE were proposed as breeding parents.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- used as parents for the breeding of N efficient genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The genotypes with more yield and high to moderate NUtE can be used as parents for the breeding of N efficient genotypes for marginal agro-ecologies”
t0“wheat”
Claim · model-written summary
Low N tolerant genotypes may be used to identify genomic regions for NUE.
- Taxon
- wheatTriticum aestivume0
- Outcome
- identification of genomic regions responsible for NUEe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low N tolerant genotypes identified from the current investigation may be further utilized in the identification of genomic regions responsible for NUE and its deployment in wheat breeding programs”
The same questions in other papers
nitrogen · yield · Triticum aestivum (wheat)Positive and negative results
323 papers in the same direction as this paper · 1,737 in the opposite direction
- positive
- no effect
- negative
2,057 papers more in this group
See all 2,061 papers →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.