Journal article
Variation in the chemical composition of wheats grown in Western Australia as influenced by variety, growing region, season, and post-harvest storage
Australian Journal of Agricultural Research, Vol.54(6), pp.541-550
2003
Abstract
Two experiments were conducted to examine varietal and environmental influences on physical characteristics and chemical content in a cohort of wheats grown in Western Australia. In Expt 1, a 3 x 3 x 2 factorial experiment examined the relationships between wheat variety (Arrino, Stiletto, and Westonia), growing region (high, medium, and low rainfall zone), and 2 harvest years (1999 and 2000). In Expt 2, the effect of storage for 6 months on the chemical composition of the wheats was examined. Wide variations in the content of crude protein (CP, CV 19.4%), total starch (CV 5.45%), total non-starch polysaccharides (NSP, CV 9.4%), insoluble NSP (CV 10.4%), and soluble NSP (CV 20.7%) were observed. The crude protein content of wheat was inversely related to total starch content (r = -0.779, P < 0.001). Variety influenced fast digestible starch (P < 0.001), acid detergent fibre (ADF, P < 0.01), total NSP (P < 0.05), insoluble NSP (P < 0.05), and in vitro extract viscosity (P < 0.05). The annual precipitation level (mm) irrespective of growing region was correlated to bushel weight (r = -0.683, P < 0.01), CP (r = -0.631, P < 0.01), total starch (r = 0.526, P < 0.05), ADF (r = -0.687, P < 0.01), lignin (r = -0.863, P < 0.001), soluble NSP (r = 0.826, P < 0.001), and free sugar contents (r = -0.795, P < 0.001), indicating the importance of annual rainfall for accumulation of protein, carbohydrates, and lignin in wheats. Harvest year had a strong influence on chemical composition (P < 0.05 to <0.001) and bushel weight (P < 0.001) of wheat. Storage for 6 months decreased soluble NSP (P < 0.01), ADF (P < 0.05), and lignin content (P < 0.01), and increased free sugar content (P < 0.001).
Details
- Title
- Variation in the chemical composition of wheats grown in Western Australia as influenced by variety, growing region, season, and post-harvest storage
- Authors/Creators
- J.C. Kim (Author/Creator)B.P. Mullan (Author/Creator)P.H. Simmins (Author/Creator)J.R. Pluske (Author/Creator)
- Publication Details
- Australian Journal of Agricultural Research, Vol.54(6), pp.541-550
- Publisher
- CSIRO
- Identifiers
- 991005540502207891
- Copyright
- (c) CSIRO
- Murdoch Affiliation
- School of Veterinary and Biomedical Sciences
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
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- Collaboration types
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.51 Dairy & Animal Sciences
- 3.51.208 Poultry Nutrition
- Web Of Science research areas
- Agriculture, Multidisciplinary
- ESI research areas
- Agricultural Sciences