Hildermann, Isabell; Messmer, Monika; Dubois, David; Boller, Thomas; Wiemken, Andres and Mäder, Paul (2010) Nutrient use efficiency and arbuscular mycorrhizal root colonisation of winter wheat cultivars in different farming systems of the DOK long-term trial. Journal of the Science of Food and Agriculture, 90 (12), pp. 2027-2038.
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BACKGROUND: For organic farming, cultivars are required with high nutrient use efficiency under nutrient limited conditions. Arbuscular mycorrhizal fungi (AMF) are known to contribute to nutrient uptake under low input conditions. We compared nutrient use efficiency (NUE) of old and modern organically and conventionally bred cultivars in organic and conventional systems and assessed AMF-root colonisation (AMF-RC) in relation to nutrient concentrations.
RESULTS: Cultivars and systems had a statistically significant effect on nitrogen (N) and phosphorus (P) concentrations and NUE parameters, whereas no genotype × environment interactions appeared. In contrast to N and P uptake, the NUE parameters were higher under organic than under conventional conditions. NUE for N increased with the year of release of cultivars. In the organic systems, the organically bred cultivars could not outperform the conventionally bred cultivars in grain yield and NUE parameters. AMF-RC was higher in the organic than in the conventional system, but did not differ among cultivars.
CONCLUSION: Cultivars achieving high NUE in the organic systems were found among modern cultivars, irrespective of the breeding programme. Nutrient conditions during the breeding programme did not affect AMF-RC. No clear evidence was found that AMF symbiosis contributed more to nutrient concentrations under low input than under high input conditions.
|EPrint Type:||Journal paper|
|Keywords:||Organic farming, plant breeding, winter wheat, nutrient use efficiency, arbuscular mycorrhizal fungi, Bodenwissenschaften, Biosaatgut, Weizensorten, Pflanzenzüchtung|
|Subjects:|| Crop husbandry > Production systems > Cereals, pulses and oilseeds|
Crop husbandry > Breeding, genetics and propagation
Crop husbandry > Crop health, quality, protection
|Research affiliation:||Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil Sciences|
|FP7 Grant Agreement Number:||222645|
|Related Links:||http://www.ncbi.nlm.nih.gov/pubmed/20582996, http://cat.inist.fr/?aModele=afficheN&cpsidt=23092247|
|Deposited By:||Hildermann, Mrs Isabell|
|Deposited On:||18 Oct 2010 10:58|
|Last Modified:||16 Dec 2011 11:20|
|Refereed:||Peer-reviewed and accepted|
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