Genotypes by Season Interaction on Yield and Yield Components of 22 Winged Bean (Psophocarpus tetragonolobus) in Jatinangor at Two Growing Season1
S. Nusifera2, Murdaningsih H.K.3, dan A. Karuniawan3
1 Part of Research Project through Post Graduate Team Research Grant, DIKTI
2 Post Graduate Student in Padjadjaran University
3Lecturer in Faculty of Agriculture, Padjadjaran University
Coresponding Author : akaruni1@unpad.ac.id
Abstract
Research aimed to know the effect of genotype x saeason interaction on yield components and yield of 22 winged bean genotypes in Jatinangor at two growing seasons and also to obtain genotypes showing best performance in each or both growing season, was conducted in experimental station of Agricultural Faculty, Padjadjaran University Jatinangor, started on January untill June 2008 (dry season) and November 2008 untill June 2009 (rainy season). Experiment was arranged in a randomized block design consisted of 22 genotypes as treatment and replicated twice. Characters observed were pod length (cm), pod number per plot, seed number per plot, time to flower (day after planting), 100 seed weight (g) and seed weight per plot (g). Data were analysed by analysis of variance and continued by Scott Knott Test to analyze genotypes effect and LSD tets for seasonal effect, each at significance level of 5%.
Results showed that there was interaction effect of genotype by season on characters of pod length, pod number per plot, and seed weight per plot. In dry season, genotypes having the longest time for flowering were 8.16 and 8.17, the high seed number per pod were 8.2 and 8.33; the longest pod were 8.5 and 8.3, highest pod number per plot was 8.30, the biggest seed size were 8.11, 8.10, 8.18, 8.13 dan 8.1, and the highest seed yield per plot were 8.10, 8.20, 8.15, 8.6, 8.13, 8.2, 8.30, 8.33, dan 8.29. Whereas in rainy season, no genotypes variation for time to flower, pod length, seed number per pod; highest pod number per plot was 8.30; the biggest seed size were 8.14, 8.3, 8.13, 8.20, dan 8.10; the highest seed yield per plot were 8.20, 8.3, 8.11, 8.14, 8.1, dan 8.6.
Key words : Genotype by season interaction, winged bean, yield component and yield.
