Horneburg, Bernd

[["dc.bibliographiccitation.firstpage","357"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Euphytica"],["dc.bibliographiccitation.lastpage","367"],["dc.bibliographiccitation.volume","180"],["dc.contributor.author","Horneburg, Bernd"],["dc.contributor.author","Becker, Heiko C."],["dc.date.accessioned","2018-09-04T11:52:34Z"],["dc.date.available","2018-09-04T11:52:34Z"],["dc.date.issued","2011"],["dc.description.abstract","Tomatoes are the most important vegetable, globally as well as in Germany. Outdoor tomato production is seriously impaired due to increasing infections with evolving late blight (Phytophthora infestans) populations. Within organic agriculture, research is being conducted to develop regionally adapted and open pollinated cultivars of outdoor tomatoes with late blight field resistance. In the present experiment, three crosses, including wild, cocktail, and beefsteak tomatoes, were selected for field resistance against late blight in F2 at one location per cross. The comparison of positive and negative selection in F3 revealed the selection of single F2 plants to be efficient in all three crosses. F2 selection has proved to be a robust and efficient tool for breeding programs. The correlated response to selection in other traits, including yield, fruit weight, days to maturity, harvest period, and plant height, depended on the cross. It was evident that selection for desired traits combined with field resistance against late blight is promising, even in wide crosses. The most undesired attribute of wild tomatoes is the formation of shoots on leaves and in inflorescences. No correlation was observed between field resistance and shoot formation, allowing the selection of genotypes with improved field resistance and yield, but without morphological disadvantages."],["dc.identifier.doi","10.1007/s10681-011-0384-3"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7358"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15649"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Selection for Phytophthora field resistance in the F2 generation of organic outdoor tomatoes"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","203"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Crop Science"],["dc.bibliographiccitation.volume","48"],["dc.contributor.author","Horneburg, Bernd"],["dc.contributor.author","Becker, Heiko C."],["dc.date.accessioned","2018-09-04T12:35:39Z"],["dc.date.available","2018-09-04T12:35:39Z"],["dc.date.issued","2008"],["dc.description.abstract","On-farm management of landraces or older cultivars of crop plants is often recommended to combine conservation and use of genetic resources, but experimental studies on on- farm management are hard to fi nd, particu- larly in industrialized countries. To investigate whether on-farm management results in regional adaptation and enhances crop biodi- versity, an experiment with lentils (Lens culi- naris Medik.) was designed. Lentil production has almost ceased to exist in central Europe, but lentils may still be found in gene banks and have remained a popular food. Three landraces were evaluated on three farms in Germany; at each farm, three populations evolved, based on three selection methods: (i) natural selection, (ii) visual mass selection, and (iii) selection for yield of single plant progenies. These selection methods were applied for two to four years. The nine populations developed for each landrace (three methods × three locations) were grown in a comparative trial on two of the farms. In most cases, populations selected at a specifi c location were at this location superior in yield to populations selected at other locations, indi- cating that on-farm management can result in site-specifi c adaptation. Signifi cant changes in morphological and phenological traits occurred. For one landrace, natural selection increased seed weight. The response to different selec- tion methods largely depended on landrace and selection site, and no method was generally superior. In conclusion, on-farm management is a useful approach to maintain, use, and develop plant genetic resources. Natural selection as the most cost-effi cient method is recommended."],["dc.identifier.doi","10.2135/cropsci2007.03.0170"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15656"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Crop Adaptation in On-Farm Management by Natural and Conscious Selection: A Case Study with Lentil"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","638"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Plant Breeding"],["dc.bibliographiccitation.lastpage","643"],["dc.bibliographiccitation.volume","137"],["dc.contributor.author","Horneburg, Bernd"],["dc.contributor.author","Becker, Heiko C."],["dc.date.accessioned","2018-09-04T12:09:06Z"],["dc.date.available","2018-09-04T12:09:06Z"],["dc.date.issued","2018"],["dc.description.abstract","Knowledge about the degree of spontaneous outcrossing of diverse genotypes is essential for breeding programmes, maintenance breeding, and seed production. For tomato (Lycopersicon esculentum Mill.), very limited scientific evidence for genotypic differences is available and evidence from Europe is scarce. To close this knowledge gap, six cultivars were investigated in three Central European locations as part of the Organic Outdoor Tomato Project. To determine outcrossing rates, the monogenetic “cut‐leaf” trait, which is dominant over the “potato‐leaf” trait, was used as morphological marker. The observed range of outcrossing was 0.0%–5.2%. Outcrossing was significantly influenced by cultivar and environment. The outcrossing rate of individual flowers varied within cultivars ranging from 0% to 37%. The potential of newly opened flowers to accept foreign pollen varied largely with the cultivar. Genotypic differences could partly be linked to flower morphology traits. The potential for recombination between tomato genotypes is generally very low but can be a source for new variation in on‐farm management."],["dc.identifier.doi","10.1111/pbr.12600"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15651"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Spontaneous outcrossing in tomato depends on cultivar and environment and varies between individual flowers"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","670"],["dc.bibliographiccitation.lastpage","673"],["dc.bibliographiccitation.volume","1"],["dc.bibliographiccitation.volumetitle","Organic Crop Production"],["dc.contributor.author","Horneburg, B."],["dc.contributor.author","Becker, H. C."],["dc.contributor.editor","Neuhoff, D."],["dc.contributor.editor","Halberg, N."],["dc.contributor.editor","Alföldi, T."],["dc.date.accessioned","2019-05-06T09:23:35Z"],["dc.date.available","2019-05-06T09:23:35Z"],["dc.date.issued","2008"],["dc.description.abstract","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 investigated 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 infections 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."],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/57898"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation.conference","Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR)"],["dc.relation.eventend","2008-06-20"],["dc.relation.eventlocation","Modena"],["dc.relation.eventstart","2008-06-18"],["dc.relation.ispartof","Cultivating the Future Based on Science"],["dc.title","Does regional organic screening and breeding make sense? Experimental evidence from organic outdoor tomato breeding."],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","pbr.13042"],["dc.bibliographiccitation.firstpage","621"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Plant Breeding"],["dc.bibliographiccitation.lastpage","633"],["dc.bibliographiccitation.volume","141"],["dc.contributor.affiliation","Becker, Heiko C.; 3\r\nDepartment of Crop Sciences, Division of Plant Breeding Methodology\r\nGeorg‐August‐Universität Göttingen\r\nGöttingen Germany"],["dc.contributor.affiliation","Horneburg, Bernd; 2\r\nSection of Genetic Resources and Organic Plant Breeding\r\nGeorg‐August‐Universität Göttingen\r\nGöttingen Germany"],["dc.contributor.author","Aichholz, Charlotte"],["dc.contributor.author","Becker, Heiko C."],["dc.contributor.author","Horneburg, Bernd"],["dc.date.accessioned","2022-11-28T09:38:39Z"],["dc.date.available","2022-11-28T09:38:39Z"],["dc.date.issued","2022"],["dc.date.updated","2022-11-27T10:11:05Z"],["dc.description.abstract","Abstract\r\nRecurrent haploid selection is based on the phenotype of haploid plants. This selection method was reported to be very effective because of the high selection pressure. The aim of this study was to quantify the effect of five generations of recurrent haploid selection on a sweet corn population developed by intercrossing 40 hybrid cultivars. We compared the initial population, five cycles of recurrent haploid selection, and mass selection after five cycles in six environments. The results indicated that recurrent haploid selection had no positive effect on yield or quality. For the traits tillering, tip fill, total yield and total number of ears, significant changes from cycle to cycle were observed but in differing directions. The performance per se of single haploid plants has probably a low correlation to their combining ability in a population. Positive mass selection of the best ears resulted in no improvement of total yield, a reduction of marketable yield and about 2‐day delay of flowering. In conclusion, recurrent haploid selection based on the phenotype of individual plants was not an efficient method to improve the sweet corn population investigated."],["dc.description.sponsorship","Sativa Rheinau AG"],["dc.description.sponsorship","AKB Stiftung and Software AG Foundation"],["dc.identifier.doi","10.1111/pbr.13042"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/117293"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-597"],["dc.relation.eissn","1439-0523"],["dc.relation.issn","0179-9541"],["dc.rights","This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes."],["dc.rights.uri","http://creativecommons.org/licenses/by-nc/4.0/"],["dc.title","Recurrent haploid selection in a population of sweet corn (Zea mays convar. saccharata)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]