Percent Crude Protein Content and Yield of Grain of Certain Soft Red Winter Wheat Varieties at Varying Levels of Nitrogen PDF Download
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Author: Carol E. Brown
Publisher:
ISBN:
Category :
Languages : en
Pages : 118
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Author: Carol E. Brown
Publisher:
ISBN:
Category :
Languages : en
Pages : 118
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Author:
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ISBN:
Category : Agriculture
Languages : en
Pages : 1810
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Author:
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ISBN:
Category : Agriculture
Languages : en
Pages : 1732
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Author: Carolina Saint Pierre
Publisher:
ISBN:
Category : Proteins
Languages : en
Pages : 250
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Hard white winter (HVVW) wheat cultivars must have superior protein quality and consistent processing quality to be successful in the Asian market. New cultivars and management strategies are needed to produce HVVW grain for both bread and noodle applications from diverse environments in the US Pacific Northwest (PNW). This study investigated the variability in grain quality, grain protein content and composition, and dough mixing properties in relation to moisture stress during grain-fill and nitrogen management in the PNW. Seven HWW and two soft white winter wheats were grown under line source irrigation and two nitrogen fertilization levels over two years and two locations. Plots were irrigated during grain-fill to replace from 100 to less than 30 % of measured evapotranspiration. Grain quality, protein quality, and protein composition were characterized by nitrogen determinations, single kernel analysis, polyphenol oxidase activity (PPO), SDS sedimentation tests, Mixograph analyses, and sizeexclusion HPLC. Water stress during grain-fill negatively affected grain yield, test weight, and kernel weight and diameter. Among HVVW cultivars, water stress caused reductions in test weight which were of larger magnitude in late maturing cultivars than in early genotypes. Mixograph peak time, stability, and tolerance were relatively unchanged over irrigation treatments. Nitrogen fertilization showed a positive contribution to both protein quantity and quality, without affecting PPO levels. Moreover, no significant correlation was found between flour protein and PPO. Changes in protein quality and composition were related to general increases in protein concentration, regardless if the result of reducing irrigation or increasing fertilization. The proportion of monomeric proteins (gliadins) increased more rapidly than the polymeric proteins (glutenins) as flour protein increased. Grouping of genotypes in biplots indicated that cultivars of similar quality responded similarly to treatment combinations in terms of protein quality and dough mixing properties. The patterns of response suggest that management strategies to meet target protein content and enduse quality are relatively independent of genotypic differences. Similar management strategies could then be recommended for HVVW when targeting specific end-uses. Early maturity reduced the impact of water and heat stress during grain-fill and would contribute to enhance grain quality and consistency in PNW cultivars.
Author:
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ISBN:
Category :
Languages : en
Pages : 1354
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Author: United States. Agricultural Research Service
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Category : Agricultural experiment stations
Languages : en
Pages : 932
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Author: Joseph H. Hulse
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Category : Friticale
Languages : en
Pages : 194
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Abstract: Cereal grains are the main sources of protein and calories for many people in the developing world. Triticale,a man-made cereal grain, is a cross between wheat and rye. Triticale promises higher yields of grain at least equal in protein content and superior in biological quality to wheat.Triticale has a higher content of lysine. Lysine content of triticale foods can be improved by supplementation with other materials with rich content such as food legumes. Present evidence suggests that sound, healthy triticale is equal to or superior to wheat in farm animal diets. Since triticale will tolerate environments unsuitable to wheat, itpromises to be a significant addition to world cereal crops for human and animal consumption. Well-defined, universally-accepted standards and methods of chemical and biological evaluation are urgently needed. The literature relative to triticale's biological value, especially concerning proteins, is reviewed.
Author: United States. Agricultural Research Service
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Category : Agricultural experiment stations
Languages : en
Pages : 1296
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Author: Margaret Kilibwa
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Category : Wheat
Languages : en
Pages : 302
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Author:
Publisher:
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Category : Agricultural experiment stations
Languages : en
Pages : 1288
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