Østergård, H.; Kristensen, K. and Jensen, J.W. (2005) Prediction of grain yield of spring barley varieties by disease and growth characteristics from VCU testing. In: Köpke, U.; Niggli, U.; Neuhoff, D.; Carnish, P. and Lockeretz, W. (Eds.) Researching Sustainable Systems, pp. 154-157.
Fifty spring barley varieties grown under organic as well as conventional growing conditions in experimental fields in four combinations of year and site were studied. The yield varied much within and between environments (years and sites) and systems. Further, the variation between varieties was substantially and it differed between different environments and systems. Associations between observed grain yield of these varieties and disease and growth characteristics assessed in the official conventional variety testing were compared between the organic and the conventional system. Using factorial regression analysis, the best model for predicting the observed grain yield each year from these characteristics the previous year was found. In this model, the residual variance component for varieties was lower for observations from the conventional growing system than from the organic growing system implying that the VCU-characteristics better predicted the results from conventional growing system. The implications for organic variety testing are discussed.
|EPrint Type:||Conference paper, poster, etc.|
|Type of presentation:||Paper|
|Subjects:|| Crop husbandry > Crop health, quality, protection|
Values, standards and certification > Regulation
Crop husbandry > Breeding, genetics and propagation
|Research affiliation:|| Denmark > DARCOF II (2000-2005) > VI.2 (BAR_OF) Characteristics of spring barley varieties for organic farming|
Denmark > AU - Aarhus University > AU, DJF - Faculty of Agricultural Sciences
Denmark > DTU, RISØ - Risø National Laboratory
|Deposited By:||Østergård, Professor Hanne|
|Deposited On:||19 Apr 2006|
|Last Modified:||12 Apr 2010 07:33|
|Refereed:||Peer-reviewed and accepted|
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