GGE biplot analysis of fluted pumpkin (Telfairia occidentalis) landraces evaluated for marketable leaf yield in Southwest Nigeria
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Date
2018
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Abstract
The study was undertaken with the objective to examine the nature and to quantify the magnitude of genotype×environment interaction (GEI) effects on marketable leaf yield of fluted pumpkin, Telfairia occidentalis (Hook. F.) and to determine the winning genotype (s) for the test environments in Southwest Nigeria. The experiment was conducted using twenty-five landraces of fluted pumpkin in four environments [comprising two different locations (Abeokuta and Akure) for two consecutive years (2012 and 2013)]. Randomized complete block design with three replicates was employed. The combined analysis of variance over environments explained that fluted pumpkin marketable leaf yield was significantly (p<0.001) affected by environments, genotypes and GEI. The result showed differential performance of fluted pumpkin landraces at different test environments and hence the interaction was crossover type. The genotype main effect plus genotype×environment interaction (GGE) biplots were applied to analyse and visualize pattern of the interaction components. The first two PCs explained 86.40% (PC1=66.93%, PC2=19.47%) of the total variation of the GGE model (i.e. G+GE). Landraces Fts34, Ftn44 and Ftk20 were most stable but Ftd1 and Ftw21 were more desirable. Landraces Fta39 (398.80g) and Ftw21 (299.60g) were high yielding and are adapted to Akure and Abeokuta respectively. Akure is considered a better location for the evaluation of fluted pumpkin for marketable leaf yield.
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Keywords
Fluted pumpkin, Landrace, GGE biplot, GEI, Marketable leaf yield
Citation
10.1016/j.jssas.2016.10.001