Stability for disease, genotype x environment interaction for yield andits components in pigeonpea [Cajanus cajan (L.) Millsp.]

Abstract

The material for study of genotype x environment (G x E) interaction comprised of 23 genotypes, which were tested in four environments, during kharif-2012 and 2013 at two locations in Agricultural Research Station, Kalaburagi and Raddevadgi located in north eastern dry zone (Zone 2) of Karnataka. The experiment was laid out in lattice design with two replications. Highly significant differences among genotypes were observed for all the characters except number of pods per plant and yield per plant. Environmental +(Genotype x Environment) interaction was significant for days to 50 per cent flowering, day to maturity, plant height, pod bearing length, number of pods per plant and seed yield per plant. The variance due to pooled deviation was highly significant for all the characters which reflect the presence of sufficient genetic variability in the material. Stability parameters for seed yield per plant indicated that ASHA(ch) was stable and desirable, followed by RVK-275 and GRG-811 which were specifically adopted for favourable and poor environments respectively. Two years of field screening for Fusarium wilt (FW) and Sterility Mosaic Disease (SMD) yielded three genotypes viz., GRG-811, GRG-2009 and ASHA for resistance to Fusarium wilt and moderate resistance to SMD. Hence, these genotypes can be used directly as a variety or choice of parent for hybridization programme.

Multi-environment testing for G×E interactions and identification of high-yielding, stable, medium-duration pigeonpea genotypes employing AMMI, GGE biplot, and YREM analyses

“…However, when the environment and genotype have different polarities, an undesirable interaction results. The results obtained from our investigation align with the recorded findings ( Kaya et al., 2002 ; Muniswamy et al., 2021 ; Reddy et al., 2023 ; Kona et al., 2024 ). The results of this study provide empirical support for the implementation of AMMI 2, showing that the AMMI model demonstrates a satisfactory degree of consistency with the gathered data.…”

Translational Pigeonpea Genomics Consortium for Accelerating Genetic Gains in Pigeonpea (Cajanus cajan L.)

“…FPVS trials from other states and multi-location trials revealed significant GEI effects, indicating a differential response of genotypes in different environments. Significant genotype, environment, and GEI in pigeonpea for grain yield were reported earlier by Muniswamy et al [59] and Arunkumar et al [60]. For instance, FPVS trials in Andhra Pradesh, at Guntur and Prakasam, LRG 105 followed by LRG 160 while at Kurnool, LRG 52 followed by LRG 160 but across the locations, LRG 160 followed by LRG 105 revealed a significantly higher grain yield.…”

Stability and Adaptation of New Tobacco Varieties to Three Growing Areas under Rain Fed Conditions in Zimbabwe

“…The objective of the testing would be to identify the best performing varieties in each of the growing environments for farmer recommendations. Environments differ in their ability to support different genotypes and environments it is refereed to edaphic, climatic and management conditions done by the farmer depending on the growing environment in which the farmer produces a crop (Mohamed, 2013, Muniswamy et al, 2017. Years also differ in their ability to support a crop, the reason why they are tested as rain fed in multi-location trials (Gauch, 1988).…”