Drought response of bean (Phaseolus vulgaris L.) cultivars using different selection indexes
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Abstract
defficit tolerance was evaluated in an experiment carried
out between the years 2012-2013 at CCSF “Roberto
Aguilar”, Bayamo municipality, Granma province, Cuba.
Two treatments were used: cultivars of bean under watering
and cultivars of bean low drought, distributed in a random
block design. Ten plants were selected at random from
each treatment where indicators were evaluated: number
of sheaths for plants, weight of the sheaths (g), lenght
of the sheaths (cm) and wide of the sheaths (mm). Also
to determine the tolerance the following indexes were
evaluated: yield losses (YL), geometrical mean productivity
(GMP), mean productivity (MP), relative efficiency index
(REI), drought tolerant tndex (DTI), stability yield index
(SYI), susceptibility drought index (SDI), harmonic mean
(HM) and tolerance (T). The results showed that the soil
hydric defficits evaluated have an influence (p≤0,05), in the
behavior of the cultivars, where CC-25-9R variety showed
the most tolerant hydric defficit, while Tomeguín-93 was
the most susceptible variety.
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