Abstract
Abstract Identification and utilization of important attributes in the nitrogen economy of wheat (Triticum aestivum L.) should provide a basis for increasing grain protein percentage (GPP). The objectives of this study were to determine the magnitude of genetic variability of some factors important in the nitrogen economy of wheat, their relationship to one another, and their influence on grain yield (GY) and GPP. Twenty‐five hard red winter wheat genotypes representing a wide range of GY, GPP, and plant stature were grown in field trials over a 2‐year period. Significant differences were found for harvest index (HI) and nitrogen harvest index (NHI). Total nitrogen at anthesis (TNA), total nitrogen at maturity (TNM), and biological yield (BY) did not differ significantly. GPP was positively correlated with TNM and BY and negatively correlated with TNA, HI, and GY. GPP was not correlated with NHI, however, stepwise regression of GPP and grain protein yield revealed NHI as a common component, with a positive coefficient. In addition, NHI was positively correlated with GY. Selection of parents with complementary traits for nitrogen‐use efficiency may allow for simultaneous increases in GY and GPP.
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Claims 9
Claim · model-written summary
Harvest index differed significantly among winter wheat genotypes.
- Taxon
- winter wheat
Triticum aestivumt0 - Outcome
- harvest index (HI)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences were found for harvest index (HI) and nitrogen harvest index (NHI)”
t0“winter wheat”
Claim · model-written summary
Nitrogen harvest index differed significantly among winter wheat genotypes.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- nitrogen harvest index (NHI)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences were found for harvest index (HI) and nitrogen harvest index (NHI)”
t0“winter wheat”
Claim · model-written summary
Total nitrogen at anthesis, total nitrogen at maturity, and biological yield did not differ significantly.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- Total nitrogen at anthesis (TNA), total nitrogen at maturity (TNM), and biological yield (BY)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total nitrogen at anthesis (TNA), total nitrogen at maturity (TNM), and biological yield (BY) did not differ significantly”
t0“winter wheat”
Claim · model-written summary
Grain protein percentage correlated positively with total nitrogen at maturity and biological yield.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- GPPe0
- Direction
- positively correlatede0
- Comparator
- TNM and BYe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GPP was positively correlated with TNM and BY”
t0“winter wheat”
Claim · model-written summary
Grain protein percentage correlated negatively with total nitrogen at anthesis, harvest index, and grain yield.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- GPPe0
- Direction
- negatively correlatede0
- Comparator
- TNA, HI, and GYe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GPP was positively correlated with TNM and BY and negatively correlated with TNA, HI, and GY”
t0“winter wheat”
Claim · model-written summary
Grain protein percentage was not correlated with nitrogen harvest index.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- GPPe0
- Direction
- not correlatede0
- Comparator
- NHIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GPP was not correlated with NHI”
t0“winter wheat”
Claim · model-written summary
Nitrogen harvest index had a positive coefficient in regressions of grain protein percentage and grain protein yield.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- GPP and grain protein yielde0
- Direction
- positive coefficiente0
- Comparator
- NHIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stepwise regression of GPP and grain protein yield revealed NHI as a common component, with a positive coefficient”
t0“winter wheat”
Claim · model-written summary
Nitrogen harvest index correlated positively with grain yield.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- GYe0
- Direction
- positively correlatede0
- Comparator
- NHIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NHI was positively correlated with GY”
t0“winter wheat”
Claim · model-written summary
The authors suggest selecting parents with complementary nitrogen use traits to increase grain yield and protein percentage together.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- Selection of parents with complementary traits for nitrogen‐use efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selection of parents with complementary traits for nitrogen‐use efficiency may allow for simultaneous increases in GY and GPP”
t0“winter wheat”