ISHS Acta Horticulturae 439: III International Strawberry Symposium
A MULTICRITERIA DECISION AID TO DETERMINE THE GENETIC PERFORMANCE OF STRAWBERRY THROUGH A VARIETAL OBSERVATORY NETWORK IN WESTERN EUROPE |
| Authors: | P. Roudeillac, W. Faedi, O. Lavialle |
| Keywords: | strawberry, Fragaria x ananassa, cultivar evaluation, trials network, analytic methods |
| Abstract:
Between 1993 and 1995, a varietal network, coordinated with E.C. funds (AIR program) operated through trials based in 17 locations in western Europe and tested 14 new European June-bearing cultivars. A common protocol was defined to assess the cultivars compared to 2 standards, i.e. ‘Chandler’ southern and ‘Elsanta’ northern. Physiological adaptation, production components, pest and disease susceptibility, qualitative fruit value (appearance, flavour), and shelf-life ability, were the criteria used to score performance, using a qualitative scale, at 2 or 3 stages during the vegetative and reproductive phases of development. Classical methods of parametric and non parametric statistics were used to analyse quantitative data from the crop. An original multi-criteria analysis method was also used to integrate all quantitative and qualitative data. First, the profile of each cultivar is described with a star diagram using 6 axis of character judgement ; Second, the use of an outranking method named ELECTRE IV enables preference relations to be constructed between pairs of cultivars according to a concept of concordance and discordance. Finally, a partial preorder is established ordering the cultivars. For each trial location, the genetic performance of cultivars is described with character judgement axis and aggregated to seek to identify a hierarchical relationship. The different relations are compared to find the effects of the different trial locations on cultivar performance. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
