Abstract
Identifying genotypes of high nitrogen utilization efficiency (NUtE) under contrasting N supply is a way of improving N economy of Indian mustard (Brassica juncea Czern & Coss) under different soil fertility. A field experiment was conducted with 22 Indian mustard genotypes grown under normal and limited N supply conditions to investigate the genotypic variations of NUtE. The genotypes ranking to NUtE was different under normal and limited N supply, however, seven genotypes (RH 1222-28, RH 1301, RH 1117, RH 601, RH 1053, NRCDR 2, RH 1441) were identified as N-responder under normal N supply, and N-efficient under limited N supply. The lowest seed yield reduction (<20%) under limited N supply was recorded in RH 601 (15%), RH 1301 (17%), RH 1215 (17%), and DRMRIJ 31 (18%) compared to normal N supply. Among these genotypes, DRMRIJ 31 and RH 1215 were the highest seed yielder (>3.0 t/ha) under normal N supply and RH 601 (>2 t/ha) under limited N supply. The linear regression analysis showed significant and positive relationship between N uptake and seed yield. Whereas, N uptake and utilization efficiency showed negative trend and decreased with increase in N uptake beyond 120 kg N/ha under normal N supply, and 60 kg N/ha under limited N supply. NUtE was positively correlated with seed yield under both normal as well as limited N supply. These results may be used to identify the key associated traits, and to isolate target genes for developing varieties/hybrids to harness better N economy.
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Claims 12
Claim · model-written summary
Seven genotypes were N responders under normal supply and N efficient under limited supply.
- Taxon
- Indian mustard
Brassica junceat0 - Material
- RH 1222-28, RH 1301, RH 1117, RH 601, RH 1053, NRCDR 2, RH 1441e0
- Outcome
- N-responder under normal N supply, and N-efficient under limited N supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seven genotypes (RH 1222-28, RH 1301, RH 1117, RH 601, RH 1053, NRCDR 2, RH 1441) were identified as N-responder under normal N supply, and N-efficient under limited N supply.”
t0“Indian mustard”
Claim · model-written summary
RH 601 had 15% seed yield reduction under limited N supply relative to normal supply.
- Taxon
- Indian mustardBrassica junceat0
- Material
- RH 601e0
- Treatment
- limited N supplye0
- Outcome
- seed yielde0
- Direction
- reductione0
- Value
- 15%e0
- Comparator
- normal N supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest seed yield reduction (<20%) under limited N supply was recorded in RH 601 (15%), RH 1301 (17%), RH 1215 (17%), and DRMRIJ 31 (18%) compared to normal N supply.”
t0“Indian mustard”
Claim · model-written summary
RH 1301 had 17% seed yield reduction under limited N supply relative to normal supply.
- Taxon
- Indian mustardBrassica junceat0
- Material
- RH 1301e0
- Treatment
- limited N supplye0
- Outcome
- seed yielde0
- Direction
- reductione0
- Value
- 17%e0
- Comparator
- normal N supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest seed yield reduction (<20%) under limited N supply was recorded in RH 601 (15%), RH 1301 (17%), RH 1215 (17%), and DRMRIJ 31 (18%) compared to normal N supply.”
t0“Indian mustard”
Claim · model-written summary
RH 1215 had 17% seed yield reduction under limited N supply relative to normal supply.
- Taxon
- Indian mustardBrassica junceat0
- Material
- RH 1215e0
- Treatment
- limited N supplye0
- Outcome
- seed yielde0
- Direction
- reductione0
- Value
- 17%e0
- Comparator
- normal N supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest seed yield reduction (<20%) under limited N supply was recorded in RH 601 (15%), RH 1301 (17%), RH 1215 (17%), and DRMRIJ 31 (18%) compared to normal N supply.”
t0“Indian mustard”
Claim · model-written summary
DRMRIJ 31 had 18% seed yield reduction under limited N supply relative to normal supply.
- Taxon
- Indian mustardBrassica junceat0
- Material
- DRMRIJ 31e0
- Treatment
- limited N supplye0
- Outcome
- seed yielde0
- Direction
- reductione0
- Value
- 18%e0
- Comparator
- normal N supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest seed yield reduction (<20%) under limited N supply was recorded in RH 601 (15%), RH 1301 (17%), RH 1215 (17%), and DRMRIJ 31 (18%) compared to normal N supply.”
t0“Indian mustard”
Claim · model-written summary
DRMRIJ 31 yielded more than 3.0 t/ha under normal nitrogen supply.
- Taxon
- Indian mustardBrassica junceat0
- Material
- DRMRIJ 31e0
- Outcome
- seed yieldere0
- Direction
- higheste0
- Value
- >3.0 t/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DRMRIJ 31 and RH 1215 were the highest seed yielder (>3.0 t/ha) under normal N supply”
t0“Indian mustard”
Claim · model-written summary
RH 1215 yielded more than 3.0 t/ha under normal nitrogen supply.
- Taxon
- Indian mustardBrassica junceat0
- Material
- RH 1215e0
- Outcome
- seed yieldere0
- Direction
- higheste0
- Value
- >3.0 t/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DRMRIJ 31 and RH 1215 were the highest seed yielder (>3.0 t/ha) under normal N supply”
t0“Indian mustard”
Claim · model-written summary
RH 601 yielded over 2 t/ha under limited nitrogen supply.
- Taxon
- Indian mustardBrassica junceat0
- Material
- RH 601e0
- Outcome
- RH 601e0
- Value
- >2 t/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RH 601 (>2 t/ha) under limited N supply”
t0“Indian mustard”
Claim · model-written summary
Nitrogen uptake and seed yield were positively associated.
- Taxon
- Indian mustardBrassica junceat0
- Treatment
- N uptakee0
- Outcome
- seed yielde0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant and positive relationship between N uptake and seed yield.”
t0“Indian mustard”
Claim · model-written summary
Nitrogen utilization efficiency declined with uptake beyond 120 kg N/ha under normal supply.
- Taxon
- Indian mustardBrassica junceat0
- Treatment
- N uptakee0
- Outcome
- utilization efficiencye0
- Direction
- decreasede0
- Value
- 120 kg N/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N uptake and utilization efficiency showed negative trend and decreased with increase in N uptake beyond 120 kg N/ha under normal N supply”
t0“Indian mustard”
Claim · model-written summary
Nitrogen utilization efficiency declined with uptake beyond 60 kg N/ha under limited supply.
- Taxon
- Indian mustardBrassica junceat0
- Treatment
- limited N supplye0
- Outcome
- NUtEt1
- Value
- 60 kg N/hae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“60 kg N/ha under limited N supply”
t0“Indian mustard”
t1“nitrogen utilization efficiency (NUtE)”
Claim · model-written summary
Nitrogen utilization efficiency correlated positively with seed yield under both N supplies.
- Taxon
- Indian mustardBrassica junceat0
- Treatment
- NUtEe0
- Outcome
- seed yielde0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NUtE was positively correlated with seed yield under both normal as well as limited N supply.”
t0“Indian mustard”
The same questions in other papers
nitrogen · yield · Brassica juncea (Indian mustard)Results differ
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