| Pak. J. Bot., 39(2): 485-496, 2007. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
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ERKUT PEKŞEN
Abstract:
The subject of this study
was to determine the temporal distribution of the flowering, pod number
and seed per plant, pod and seed setting performance and their
relationships to seed yield in common bean (Phaseolus vulgaris
L.). Field trials were arranged in Randomised Complete Block Design with
three replications and carried out at the University of Ondokuz Mayıs,
Faculty of Agriculture, during 2002 and 2003 in Samsun, Turkey. Means of
studied variables over two years in six common bean genotypes ranged
from 37.01 - 60.05 flowers plant-1 (NFP), 8.28 - 13.96 pods
plant-1 (NPP), 16.13% - 29.93% for pod setting ratio (PSR),
2.77 - 6.12 seeds pod-1 (NSP), 0.70 - 0.95 unfilled seeds pod-1
(NUSP), 76.28% - 90.12% for seed setting ratio (SSR), 16.57 - 67.31
seeds plant-1 (NSPP) and 143.7 - 349.5 g m-2 for
seed yield (SY). Genotypes differed for all examined variables, except
for NUSP. All traits varied between years, with the exception of SSR.
Positive and strong correlations were found between SY and NFP, NPP,
NSPP in both years. NPP, PSR and NSPP reduced drastically in Şahin-90
and Yunus-90 cvs. in 2003 when compared with 2002. Therefore, seed yield
of both cultivars were evidently lower in 2003. Regression
equations
for the relationships between NPP and SY were Y = 0.383x2 +
19.349x - 4.5687 in 2002 and Y = 0.3035x2 + 13.749x + 32.084
in 2003. The highest R2 values were obtained from the
relationship between NPP and SY (R2=0.9453 in 2002 and R2=0.9438
in 2003). Department of Field Crops, Faculty of Agriculture, Ondokuz Mayıs University, 55139 Kurupelit/ Samsun, Turkey. Correspondence Author's E-email: erkutp@omu.edu.tr |
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