Evaluation of genotype by environment interaction and adaptability in lowland irrigated rice hybrids for grain yield under high temperature

Abstract

Recent predictions on climate change indicate that high temperature episodes are expected to impact rice production and productivity worldwide. The present investigation was undertaken to assess the yield stability of 72 rice hybrids and their parental lines across three temperature regimes over two consecutive dry seasons using the additive main effect and multiplicative interaction (AMMI), genotype and genotype × environment interaction (GGE) stability model analysis. The combined ANOVA revealed that genotype × environment interaction (GEI) were significant due to the linear component for most of the traits studied. The AMMI and GGE biplot explained 57.2% and 69% of the observed genotypic variation for grain yield, respectively. Spikelet fertility was the most affected yield contributing trait and in contrast, plant height and tiller numbers were the least affected traits. In case of spikelet fertility, grain yield and other yield contributing traits, male parent contributed towards heat tolerance of the hybrids compared to the female parent. The parental lines G74 (IR58025B), G83 (IR40750R), G85 (C20R) and hybrids [G21 (IR58025A × KMR3); G3 (APMS6A × KMR3); G57 (IR68897A × KMR3) and G41 (IR79156A × RPHR1005)] were the most stable across the environments for grain yield. They can be considered as potential genotypes for cultivation under high temperature stress after evaluating under multi location trials.

Evaluation of Open Pollinated Maize (<i>Zea mays</i> L.) Varieties for Mid Altitude Areas of Western Guzi Zone, Southern Oromia, Ethiopia

“…Purchase [27] stated that, genotypes close to origin are stable while those far from origin are considered to as unstable genotypes. In terms of adaptability, the genotype closest to a given vector in any environment is more adaptable to that environment, whereas the genotype furthest from a given vector in any environment is less adaptable to that environment [28]. Inline to the following principle Gibe 2 was adaptable to Abaya2 and Abaya1 environments while Kulani and Gibe 1 were adaptable to Abaya3, Galana1 and Galana3 environments (figure 3).…”

Hybrid Rice Production: A Worldwide Review of Floral Traits and Breeding Technology, with Special Emphasis on China

“… High cost of hybrid seeds: Hybrid seeds are more expensive than traditional varieties, which can make them unaffordable for small-scale farmers [ 29 ]. Inconsistent performance: Hybrid rice can exhibit variability in performance due to genotype-by-environment interactions, making it difficult to predict yield under different growing conditions [ 41 ]. Limited genetic diversity: Hybrid rice relies on a limited number of parental lines, which can lead to decreased genetic diversity and increased susceptibility to disease and pests [ 42 ].…”

“…Inconsistent performance: Hybrid rice can exhibit variability in performance due to genotype-by-environment interactions, making it difficult to predict yield under different growing conditions [ 41 ].…”

Genotype by environment and genotype by yield*trait interactions in sugar beet: analyzing yield stability and determining key traits association

“…The model plays a crucial role in examining the impact of GEI and visualizing its patterns. This model aids in identifying stable genotypes across varying environments 19 . However, the AMMI model has its limitations 20 , 21 .…”