subproject C: "Genotype by crop management interactions"
Modern techniques in marker technology as well as in computational analysis make possible to detect genotype by crop management as well as marker by crop management interactions precisely. This allows the farmer to select the most promising cultivar(s) for specific conditions and to adjust the crop management within the given rules. The plant breeder will be able to establish a knowledge-based selection strategy in respect to the various crop management systems. Within this subproject we will test the 220 selected winter wheat cultivars in three different crop management systems with a special emphasis on root traits. The trails will be analyzed in a mixed model framework in order to detect the genotype by management interaction and to identify the genomic regions and then the underlying candidate genes that are responsible for the interactions. By integrating the official state cultivar recommendation trails (LSV) and clustering these trails in respect to expected future climatic conditions, the genomic regions which are responsible to the climatic effects in the same manner will be evaluated. Combining this information of crop management and environment interactions will increase the sustainability and stability of plants to climatic changes.
Genotype by crop management interactions exist and can be separated into (i) analysis of marker trait association and (ii) marker by crop management interactions. The LSV have been performed in diverse environmental conditions. Some of them are similar to the climatic scenarios expected in the near future. Therefore, the LSV results bear not only information about the development of cultivars but also information about the genotypic response to future climatic scenarios.
The outcome of the subproject will be the identification of QTL regions showing interaction with the crop management.
The subproject consists of five Working Packages:
WP 1: In the first three years field experiments on the influence of production intensity (“low-input”, “optimum” and “intensive”) on yield and quality characteristics of the 220 genotypes will be set up on the Campus Klein-Altendorf near Bonn (in the following text referred to as “Bonn”).
WP 2: During the growing season, developmental and agronomic traits will be collected.
WP 3: The wheat cultivars and hybrids will be tested for their root growth traits in pots as well as in field plots.
WP 4: The public available data of the official state cultivar recommendation trails (LSV) of the last 20 to 25 years and the weather data of the corresponding testing sites will be collected.
WP 5: The data of all experiments from each location/year in the network will be analyzed according to the experimental design.
project leader: Prof. Dr. Jens Léon