| Virginia
Journal of Science.
2001. Vol 52 (1) : 35-43 |
| Environmental
Effects on Yield and Agronomic Traits of Common Bean (Phaseolus
vulgaris L.) Tadesse Mebrahtu, Teklu Andebrhan, and Ali Mohamed ,Virginia State University, Agricultural research Station, Virginia State University, Petersburg, VA 23806 ABSTRACT
Common bean (Phaseolus
vulgaris L.) demand is increasing with an alarming rate around
the world, especially in Latin America, Africa, and Asia.
Therefore, increase bean yield per hectare is the best way to
meet the world demand rather than expansion of area under
cultivation. The objectives of this experiment were to determine
the genotypic variations for green bean and dry seed yield and
magnitude of genotype x environment interaction effects on yield and
yield components of common bean. Thirteen genotypes were planted during
the 1992, 1994, and 1995 growing seasons. Genotypes were evaluated for
green pod and seed yield and yield components at R7 and R9
growth stages. Years differed significantly for all recorded parameters
at both R7 and R9 stages. Genotypes and genotype x year interaction
were also differed significantly for most measured parameters at both
stages. The genotype Eagle showed the highest green pod yield, while
Branco and Blue Ridge ranked second and third, respectively when
averaged over the three years. Number of pods plant-1, hundred pod
weight and pod length were positively and significantly correlated with
green pod yield. Number of pods plant-1 showed the highest correlation
(r = 0.61**) with green pod yield. All the recorded parameters were
positively significantly correlated with dry seed yield. Plant height
was negatively correlated with seed size, number of seeds plant-1 and
seed weight plant-1. Number of pods plant-1 was positively correlated
(r = 0.51**) and seed size exhibited highest correlation value
(r = 0 .48**) with seed yield. Seed size and number of pods plant
-1 can be effectively used for indirect selection of green pod yield
and dry seed yield of common bean. Key words: Common bean, Phaseolus vulgaris, yield, growth stage. |