Yield performance of field beans (Vicia faba L.) in relation to interactions between inflorescences at different nodes

Abstract

SummaryCompetitive and regulatory effects of defined inflorescences on the development of other inflorescences and subsequent yield performance of field beans (Vicia faba L.) were investigated. Genotypes differing greatly in yield performance (two inbred lines and the F1 hybrid produced from the two inbred lines) were used in both field and pot experiments. Yield was manipulated by the removal of defined inflorescences at various times and positions.In comparison with untreated control plants the removal of up to four inflorescences from basal, central or apical nodes caused a loss of yield potential of up to 65%. Nevertheless the final seed yield per plant was not reduced. This was because additional pods and seeds developed at remaining inflorescences. After the removal of inflorescences from either basal or apical regions of the plant significant overcompensation effects occurred. The effects were influenced by the growing conditions. The capacity for compensation existed at differing yielding levels regardless of different genotypes or growing conditions.The results are discussed with respect to the utilization of the initiated yield potential and to yield reliability.