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Collaborative project: Increasing the contents of positive and decreasing the contents of negative compounds in grape berries (Vitis vinifera) - Subproject 1

Project


Project code: 2814304507
Contract period: 01.01.2008 - 30.04.2011
Budget: 231,728 Euro
Purpose of research: Experimental development

Molecular markers proved to be an extremely valuable diagnostic tool to improve grapevine breeding efficiency. The project aimed at the development of markers for both positive and negative aroma compounds. Thus, candidate gene approaches and linkage analysis were performed. Analytical, sensory and olfactometry tests were used for phenotyping of the plant material. The comparison of aromatic versus neutral aromatic cultivars indicated partially large differences in the coding sequence of candidate genes. Numerous mutations were found in an -Terpineolsynthasegen and a potential Monoterpensynthasegen. Based on the mutations, molecular markers for MAS have been developed. In contrast, a Quinonoxidoreduktase, a key enzyme of Furaneolbiosynthesis, not on the wrong grade correlated mutation. Alternatively, a genetic map was developed, and thus created the basis for QTL mapping of negative flavors.

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Subjects

Associated projects: Increasing the contents of positive and decreasing the contents of negative compounds in grape berries (Vitis vinifera)

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