Protease and nitrate reductase seasonal patterns and their relation to grain protein production of high vs. low protein wheat varieties

1972 ◽  
Vol 20 (6) ◽  
pp. 1138-1141 ◽  
Author(s):  
Srinivas C. Rao ◽  
Lavoy I. Croy
Keyword(s):  
Nitrate Reductase ◽  
Protein Production ◽  
Grain Protein ◽  
Seasonal Patterns ◽  
Wheat Varieties ◽  
Low Protein

SEASONAL PATTERNS OF DENITRIFICATION AND LEAF NITRATE REDUCTASE ACTIVITY IN A CORN FIELD

1978 ◽  
Vol 58 (2) ◽  
pp. 283-285 ◽  
Author(s):  
D. G. PATRIQUIN ◽  
J. C. MacKINNON ◽  
K. I. WILKIE
Keyword(s):  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
General Trend ◽  
Reductase Activity ◽  
Seasonal Patterns ◽  
Assay Procedure ◽  
Acetylene Blockage Technique ◽  
Acetylene Blockage ◽  
Leaf Nitrate

Denitrification in soil around the bases of corn stalks, determined by the "acetylene blockage technique," exhibited a general trend of decline from June to September. Leaf nitrate reductase activity, determined by an in vivo assay procedure, was low in June and July, and then exhibited a pronounced maximum at the time of tasselling.

Nitrogen requirements of irrigated wheat on the Darling Downs

1981 ◽  
Vol 21 (111) ◽  
pp. 424 ◽  
Author(s):  
WM Strong
Keyword(s):  
Grain Yield ◽  
Protein Concentration ◽  
N Fertilizer ◽  
Yield Response ◽  
Grain Protein ◽  
Price Ratio ◽  
Grain Protein Concentration ◽  
Low Protein ◽  
Management Factors ◽  
Irrigated Wheat

Eighteen fertilizer trials, each with five levels of nitrogen (N) and three levels of phosphorus (PI, were conducted on black earth soils of the Darling Downs to establish optimal economic rates of N fertilizer in commercial, irrigated wheat crops. The optimal economic rate of N with a fertilizer: wheat price ratio (kg N: kg grain) of 5:l, the yield response of 100 kg/ha of applied N, the yield without fertilizer, and the yield with fertilizer not limiting were calculated from derived yield response relations at each site. A multi-variate regression procedure was used to determine which soil or crop management factors significantly influenced the rate of N needed to optimize wheat yield. Delay in planting after June 1 and the level of residual mineral N in the soil at planting had strong negative effects on the response to fertilizer and the optimal rate of fertilizer required. The results indicate that yields of irrigated wheat may be below the economic optimum because of sub-optimal applications of N. Other soil and management factors such as available soil P and number of irrigations also affected grain yield. At 1 3 sites low protein wheat (< 1 1.4�1~) was produced with all but the highest two rates of N fertilizer and at two sites even the highest rate produced low protein wheat. The effect of N fertilizer applied at planting on grain protein concentration was changed by the yield response to the fertilizer application. Grain protein concentration was curvilinearly related (R2 = 0.81) to relative grain yield (yield as a proportion of the maximum yield); grain protein was at its minimum at a relative yield of 0.5. Although heavy rates of N fertilizer at planting increased grain protein concentration on a few sites, usually these applications led to an inefficient use of N fertilizer; apparent incorporation of fertilizer N into grain decreased with increasing rate of fertilizer.

Nitrogen Utilization in High and Low Protein Wheat Varieties 1

1960 ◽  
Vol 52 (4) ◽  
pp. 207-209 ◽  
Author(s):  
Jagdish Seth ◽  
T. T. Hebert ◽  
G. K. Middleton
Keyword(s):  
Nitrogen Utilization ◽  
Wheat Varieties ◽  
Low Protein

Influence of Fertilizer Treatments on Yield, Grain Protein, and Heading Dates of Five Wheat Varieties

1963 ◽  
Vol 55 (6) ◽  
pp. 556-558
Author(s):  
Harold V. Eck ◽  
Billy B. Tucker ◽  
A. M. Schlehuber
Keyword(s):  
Grain Protein ◽  
Wheat Varieties

EFFECTS OF DILUTE SPRAYS OF SIMAZINE ON SPRING WHEAT

1969 ◽  
Vol 49 (2) ◽  
pp. 155-158 ◽  
Author(s):  
F. H. McNeal ◽  
J. M. Hodgson ◽  
M. A. Berg
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Triticum Aestivum L ◽  
Grain Protein ◽  
Wheat Varieties ◽  
Percent Protein ◽  
R Value

In 1967, 18 spring wheat varieties (Triticum aestivum L. em Thell.) were grown in the field at Bozeman, Montana, and sprayed on three dates with low rates of 2-chloro-4,6-bis (ethylamino) -s-triazine (simazine).The simazine treatments significantly affected both yield and percent protein. Yields decreased as rate of simazine increased and as wheat plants were more mature when treated. The May 16 and June 16 simazine treatments resulted in grain protein about 2% higher than the control, but this increase was accompanied by a corresponding decrease in yield of grain.A highly significant r value of 0.77 between grain protein and the grain to straw ratio suggests that grain protein is heavily dependent on total foliage production.

Effects of Defoliation on Yield and Forage Quality of Some Tropical Grasses, Legumes and their Mixtures

1982 ◽  
Vol 18 (2) ◽  
pp. 157-166 ◽  
Author(s):  
A. E. Osman ◽  
A. A. Abu Diek
Keyword(s):  
Crude Protein ◽  
Dry Matter ◽  
Protein Production ◽  
Pure Stand ◽  
Rhodes Grass ◽  
Tropical Grasses ◽  
Buffel Grass ◽  
Low Protein ◽  
Butterfly Pea

SUMMARYThe performance of three tropical grasses and three legumes (buffel grass, rhodes grass, green panic, butterfly pea, phillipesara and alfalfa), grown in pure stand and in legume–grass mixtures, was evaluated over two seasons when cut monthly at 0, 7 or 14 cm high. Harvesting at 7 cm favoured total dry matter and crude protein production in all cases, with highest yields from butterfly pea grown alone. Buffel grass was the best dry matter producer among grasses in pure stand, while rhodes grass–butterfly pea mixture was the best legume–grass mixture. Forage of these low-protein tropical grasses could be significantly improved by growing them in mixture with legumes.

scholarly journals Trend, Population Structure And Trait Mapping From 15 Years Of National Varietal Trials Of UK Winter Wheat

2021 ◽  
Author(s):  
Oluwaseyi Shorinola ◽  
James Simmonds ◽  
Luzie Wingen ◽  
Keith Gardner ◽  
Cristobal Uauy
Keyword(s):  
Winter Wheat ◽  
Protein Content ◽  
Temporal Trends ◽  
Grain Protein Content ◽  
Environmental Stability ◽  
Grain Protein ◽  
Wheat Varieties ◽  
A Genome ◽  
Gene X Environment Interactions ◽  
Winter Wheat Varieties

There are now a rich variety of genomic and genotypic resources available to wheat researchers and breeders. However, the generation of high-quality and field-relevant phenotyping data which is required to capture the complexities of gene x environment interactions remains a major bottleneck. Historical datasets from national variety performance trials (NVPT) provide sufficient dimensions, in terms of numbers of years and locations, to examine phenotypic trends and study gene x environment interactions. Using NVPT for winter wheat varieties grown in the UK between 2002 – 2017, we examined temporal trends for eight traits related to yield, adaptation, and grain quality performance. We show a non-stationary linear trend for yield, grain protein content, HFN and days to ripening. Our data also show high environmental stability for yield, grain protein content and specific weight in UK winter wheat varieties and high environmental sensitivity for Hagberg Falling Number. Using the historical NVPT data in a genome-wide association analysis, we uncovered a significant marker-trait association peak on wheat chromosome 6A spanning the NAM-A1 gene that have been previously associated with early senescence. Together our results show the value of utilizing the data routinely collected during variety evaluation process for examining breeding progress and the genetic architecture of important traits.

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