Dynamics of flower appearance, flowering, pod and seed setting performance and their relations to seed yield in common bean (Phaseolus vulgaris L.)
Özet
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 (Phaseolits vulgaris L.). Field trials were arranged in Randomised Complete Block Design with three replications and carried out at the University of Ondokuz Mayis, 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-' (NSP), 0.70 - 0.95 unfilled seeds pod-' (NUSP), 76.28% - 90.12% for seed setting ratio (SSR), 16.57 - 67.31 seeds plant' (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 Sahin-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 = 0.383x(2) + 19.349x - 4.5687 in 2002 and Y = 0,3035x(2) + 13.749x + 32.084 in 2003. The highest R-2 values were obtained from the relationship between NPP and SY (R-2=0. 9453 in 2002 and R-2=0. 9438 in 2003).
