Genetic diversity among North African faba bean landraces for competitive ability against weeds
2018
The genetic diversity of Moroccan faba bean (Vicia faba L.)
landraces should be exploited to improve the competitive
ability of faba beans against weeds. The objective of this
study was to in-detail evaluate competitive ability and
productivity of a collection of Moroccan faba bean landraces
relative to a model weed, Sinapis alba. Sixty Moroccan
faba bean landraces and two checks were evaluated
in 2011 and 2013 for grain yield and further agronomic
traits, with and without model weed stress, under field
conditions at two locations in the northwest of Morocco,
using a split-plot design. The landraces showed significant
genetic variation for productivity and competitive
ability. Several landraces exhibited higher values compared
to the two checks. Yield loss attributable to weed
stress was, on average, about 69%; the weed competitive
index was, on average, about 1.28. Landraces × weed
treatment interaction for yield was a highly significant
and marked source of variation. Several landraces were
found to combine high levels of both, competitive ability
against the model weed and productivity.
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