Delineating Genotype × Environment interactions towards durable resistance in mungbean against Cercospora leaf spot (Cercospora canescens) using GGE biplot

Abstract

Cercospora leaf spot (Cercospora canescens) is a major fungal disease which impedes mungbean production worldwide. Presence of wider host range with existence of pathogenic variability creates intricacy towards host‐pathogen dynamics. Moreover, environmental factors having crucial role in augmenting severity of this disease further complicate disease management. An attempt has been made for unfolding genotype x environment interactions towards identifying and validating durable resistant genotypes against cercospora leaf spot in multi‐environment testing. Preliminary screening with 246 genotypes under artificial epiphytotic condition was conducted to extract out a subset of 22 mungbean genotypes for further evaluation in field testing across six environments consecutively for two years. GGE biplot analysis detected significant environmental influence towards genotypic response and confirmed the presence of non‐crossover interaction with incoherent genotypic response, thus advocating the urgency for multi‐location testing. GGE biplot aptly identified “LGG 460” and “COGG 912” as “ideal” and “desirable” genotypes, respectively having durable resistance and genetic homeostasis and thus suggested for their utilization in future resistance breeding programme in mungbean against cercospora leaf spot.

Understanding G × E Interaction for Nutritional and Antinutritional Factors in a Diverse Panel of Vigna stipulacea (Lam.) Kuntz Germplasm Tested Over the Locations

“…Among all the tested traits except for grain Ca, COI was observed for all the traits. Therefore, it can be said that within the same data set, both COI and non-COI were detected which was in affirmation with earlier findings ( Dehghani et al, 2006 ; Sabaghnia et al, 2008 ; Das et al, 2019 , 2020 ; Singh B. et al, 2020 ). The identified genotypes (G-75, G-76, G-60, G-27, G-95) for all the five studied traits would be precious genetic stocks for utilization as parents in a V. stipulacea biofortification program.…”

Degree of Sporulation (SP) and Normalized Difference Vegetation Index (NDVI) as Important Parameter for Characterizing Field Resistance against Cercospora Leaf Spot (CLS) in Mungbean

“…For each trait under study there was differential response of the genotype to environmental changes. Presence of significant environment × genotype interaction in response to disease resistance in our study was in accordance with the previously reported works on barley/net blotch interaction studied by Cherif et al (2010) as well as recent works on pea/leaf rust interaction studied by Das et al, (2019) as well as mung bean/ CLS interaction studied by Das et al, (2020).…”

Deciphering Genotype-By-Environment Interaction for Target Environmental Delineation and Identification of Stable Resistant Sources Against Foliar Blast Disease of Pearl Millet

“…Bootstrapping at 95% CL improved the precision of recommendation of a testing location and ME delineation. However, reported groupings of environments need to be further reconfirmed using multi-location testing data over more number of years as also reported by earlier authors (Yan et al, 2000;Silva et al, 2011;Phuke et al, 2017;Sánchez-Martín et al, 2017;Das et al, 2020). Also, the performance and stability of all selected materials advocate additional testing in central and southern pearl millet-growing regions of the country for the future development of elite FB-resistant cultivars.…”