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Does regional organic screening and breeding make sense? Experimental evidence from organic outdoor tomato breeding

Horneburg, Dr. Bernd and Becker, Prof. Heiko (2008) Does regional organic screening and breeding make sense? Experimental evidence from organic outdoor tomato breeding. Paper at: Cultivating the Future Based on Science: 2nd Conference of the International Society of Organic Agriculture Research ISOFAR, Modena, Italy, June 18-20, 2008.

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Summary

Does regional organic screening and breeding make sense? To answer this question we looked for experimental evidence in an organic outdoor tomato project. Potentially suitable varieties were collected, genotype x environment interactions were investiga-ted and selection was carried out within three crosses at three farms in Central and Northern Germany. The resulting selections were compared at all farms. Screening within organic horticulture was the most important means of finding suitable varieties. After three years of evaluation, 71% of the 18 most successful varieties came from colleagues within organic horticulture. The analysis of the regional evaluation did not reveal strong interactions of varieties and locations. The rate of Phytophthora (late blight) fruit infections significantly depended on the year, thus stressing the need for long-term evaluation. Site specific adaptation was partially observed for late blight in-fections and for yield. The main advantage of multilocational selection, however, was to make use of the selection potential at each farm. At Rhauderfehn, the farm with the highest level of Phytophthora infections, selection led to reduced fruit infection and extended harvest period. Selection at Ellingerode resulted in the highest yield. We recommend multilocational breeding approaches with frequent exchange of breeding material and data.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Organic breeding, tomato, Phytophthora infestans
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Breeding, genetics and propagation
Crop husbandry > Production systems > Vegetables
Research affiliation: International Conferences > 2008: IFOAM OWC: Research Track / ISOFAR > 2.5 Plant breeding
Deposited By: Horneburg, Dr Bernd
ID Code:11812
Deposited On:30 Sep 2008
Last Modified:12 Apr 2010 07:36
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:This paper is published in the conference proceedings:
Neuhoff, Daniel; Halberg, Niels; Alfldi, Thomas; Lockeretz, William; Thommen, Andreas; Rasmussen, Ilse A.; Hermansen, John; Vaarst, Mette; Lck, Lorna; Carporali, Fabio; Jensen, Henning Hgh; Migliorini, Paola and Willer, Helga, Eds. (2008) .Cultivating the Future Based on Science. Proceedings of the Second Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), held at the 16th IFOAM Organic World Congress in Cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the Consorzio ModenaBio, 18 . 20 June 2008 in Modena, Italy.. International Society of Organic Agriculture Research (ISOFAR), c/o IOL, DE-Bonn, Research Institute of Organic Agriculture FiBL, CH-Frick. http://orgprints.org/13672 and http://orgprints.org/13674

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