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Prediction of Grain Yield of Spring Barley Varieties by Disease and Growth Characteristics from VCU Testing
H. Østergård1, K. Kristensen2 and J. W. Jensen3
Abstract
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 greatly within and between environments (years and sites) and systems. Furthermore, the variation among varieties was substantial and differed among 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 was found for predicting
the observed grain yield each year from these characteristics in the previous
year. 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.
A paper copy and PDF version may be ordered from FiBL (see FiBL shop at https://www.fibl.org/shop/index.php);
FiBL order number 1394. A PDF version is available free of charge for
ISOFAR members via the member area of www.isofar.org
Source
Köpke et al (Eds) (2005): Researching Sustainable Systems. Proceedings
of the First Scientific Conference of the International Society of Organic
Agriculture Research (ISOFAR). ISOFAR / IOL / FiBL, Bonn and Frick; ISBN
3-906081-76-1
Author Locations and Affiliations
(1) Risø National Laboratory, P.O. Box 49, 4000-Roskilde,
Denmark, +4546774111, E-Mail: hanne.oestergaard@risoe.dk,
Website: www.risoe.dk
(2) Department of Genetics and Biotechnology, Danish Institute
of Agricultural Sciences, Post Box 50, DK-8830 Tjele, Denmark, E-Mail:
kristian.kristensen@agrsci.dk,
Website: www.agrsci.dk
(3) Department of Variety Testing, Danish Institute of
Agricultural Sciences, Post Box 7, DK-4230 Skælskør, Denmark,
E-Mail: Jakob.Willas@agrsci.dk,
Website: www.agrsci.dk
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