Genetic diversity of agricultural crops in Flanders over the last five decades

International audience ; In this study, we describe the evolution of crop diversity in Flanders, using three indicators to measure diversity between crops and within crops: the Shannon index (H), the evenness index (E) - both used for diversity between and within crops - and genetic relatedness between varieties (CP). Despite the significant increase in the number of crops in Flanders, from 67 in 1950 to 101 in 2002, the results show a weak decrease in crop diversity between 1950 and 2002: H decreased from 2.52 to 2.50 and E decreased from 0.58 to 0.53. This apparent contradiction can be expla... Mehr ...