Tuber Yield and Yield Components of 12 Winged Bean (Psophocarpus tetragonolobus) Genotypes under Reproductive Pruning Practice in Jatinangor1
Murdaningsih H.K.2, A. Karuniawan2, dan S. Nusifera3
1Part of Research Project through Post Graduate Team Research Grant, DIKTI
2 Lecturer in Faculty of Agriculture, Padjadjaran
3Post Graduate Student in Padjadjaran University University
Coresponding Author : akaruni1@unpad.ac.id
Abstract
Research aimed to know the effect of reproductive pruning on tuber yield and yield components of 12 winged bean genotypes, was conducted in experimental station of agricultural faculty started from april 2009 until october 2009. Experiment was arranged in randomized block design with split-plot pattern and replicated twice. Main plot was reproductive pruning consisted of two levels namely with (p) and without pruning (np). Whereas, sub plot was 12 winged bean genotypes. Variables observed were tuber length (cm), tuber diameter (cm), tuber volume (ml), tuber weight per plant (g), number of tuber per plant, and tuber weight per plot (kg). Data were analysed using analysis of variance, if there was significant source of variance, analysis was continued with Scott Knott Cluster Analysis for genotype simple effect and LSD for pruning simple effect, with 5% level respectively.
Results showed that there were interaction effect of pruning and genotypes on tuber diameter, number of tuber per plant, and tuber weight per plant. Eventhough singly, pruning didn’t show significant effect on all characters observed, for tuber diameter, number of tuber per plant, and tuber weight per plot, effectivity of pruning was seen on several genotypes. Single effect of genotype was seen on tuber volume and tuber weight per plant. For tuber length, pruning, genotypes and interaction of both, seemed to have no effect on it. Genotypes of 8.20, 8.16, 8.29, 8.10, and 8.6 were potential genotypes for tuber production for they had tuber diameter over 2 cm.
Keywords : winged bean, reproductive pruning, tuber
