8232: Influence of varietal characteristics, disease load and weed infestation on grain yield of spring barley in low input cropping systems
(2006) Influence of varietal characteristics, disease load and weed infestation on grain yield of spring barley in low input cropping systems . Working Paper.
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Summary
For organic crop production, well-characterised varieties increase the possibilities for controlling diseases and weeds and compensating for deficits in nutrients. Variation in grain yield was studied in 52 spring barley varieties and 17 combinations of location, growing system and year. Choice of variety was found to be as important a factor for grain yield as other factors in the management. The genetic potential of single varieties and the interaction between varieties and environments were analysed using regression with environmental variables as covariates. Disease resistance characteristics of the varieties coupled with the environmental disease load of powdery mildew, leaf rust and net blotch and total weed infestation had a highly significant influence on grain yield, whereas the effect of varietal weed suppression coupled with level was weaker but yet significant in most cases. Scald occurred at low levels in most environments, resulting in a relatively poor basis for drawing conclusion about the influence of this disease. The slopes of the regression lines varied between groups of varieties, i.e., increased susceptibility of the varieties resulted in general in increasing yield losses. The results confirm the power of using environmental variables and external variety trait variables as covariates in crop-loss analysis, in particular in biological systems with highly variable environments and potential large host genotype effects on biotic stresses.
| Document Language: | English |
|---|---|
| Subject Areas: | Crop husbandry > Crop health, quality, protection Crop husbandry > Weed management 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 > DIAS - Danish Institute of Agricultural Sciences Denmark > RISØ - Risø National Laboratory |
| Funding Part: | 75-100% |
| Total budget (Euro): | 0 |
| Orgprints ID Number: | 8232 |
| Contact: | Østergård, Senior Research Specialist Hanne |
| Deposited On: | 19 April 2006 |
| EPrint Type: | Working paper |
| Published?: | Unpublished |
| Peer Review Status: | Not peer-reviewed |
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