Delineation of Genotype-by-Environment interactions for identification and validation of resistant genotypes in mungbean to root-knot nematode (Meloidogyne incognita) using GGE biplot.

Scientific Reports
Bansa SinghSanjeev Gupta

Abstract

Susceptibility to root-knot nematodes (Meloidogyne spp.) is one of the major factors limiting mungbean production in South and South-East Asia. Host-pest-environment interaction in mungbean and root-knot nematode (M. incognita) was investigated in multi-location field evaluation using 38 promising mungbean genotypes extracted from initial evaluation of 250 genotypes under sick plots considering second stage freshly hatched juvenile as inoculants. The extent of environmental and genotype-by-environment interactions (GGE) was assessed to comprehend the dynamism of resistance and identification of durable resistant mungbean genotypes. Among environmental factors, nematode activity was highly influenced by rainfall and minimum temperature. The GGE biplot and multiple comparison tests detected a higher proportion of genotype × environment (GE) interaction followed by genotype and environment on number of nematode galls, gall index and reproduction factor. The first two principal components (PCs) explained 64.33% and 66.99% of the total variation of the environment-centered gall scoring and reproduction factor data, respectively. The high GE variation indicated the presence of non-cross over interactions which justify the necessities...Continue Reading

References

Jan 1, 1990·Advances in Genetics·J G Scandalios
Jan 5, 2002·Crop Science·Weikai Yan, Istvan Rajcan
Apr 1, 1994·Plant Physiology·J. RyalsE. Ward
May 1, 2013·Plant Disease·J López-RoblesG Sacristán-Pérez-Minayo
Dec 1, 2002·Plant Disease·Weikai Yan, Duane E Falk

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Methods Mentioned

BETA
PCA

Software Mentioned

GGE biplot
R
Jorhat
GGE
R Development Core Team

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