Stability analysis for grain yield and quality traits in selected traditional and improved varieties of rice over different Zones of Karnataka

Abstract

Traditional rice varieties (TRVs) form important components of genetic reservoir. TRVs used in study viz., Rajamudi, Ratnachoodi and Jeerigesanna are photosensitive. They may exhibit Genotype by Environment (G×E) interactions for grain yield and quality traits. Hence, present experiment was conducted to understand responses of yield and quality traits in selected traditional along with improved varieties of rice over five different locations of Karnataka using additive main effects and multiplicative interaction (AMMI) model and bi-plots were developed following GGE bi-plot methodology. AMMI analysis revealed that there existed significant GE interaction among ten rice varieties and genotypes and environments were diverse in nature. IPCA1 and IPCA2 together explained more than 75% of GE interaction for yield and quality traits and maximum GE interaction was explained by IPCA (Interaction Principle Component Analysis) 1. BR-2655 and Ratnachoodi were found to be most stable varieties and Mugadsiri was found to be most unstable variety for grain yield. Jeerigesanna and BPT-5204 were stable for gel consistency and amylose content respectively. Among rice varieties used, BR-2655 was found to be the best variety since it recorded highest grain yield and also it was stable performer for grain yield and also amylose content across five different locations.

Stability analysis for quality traits in rice hybrids using AMMI model

“…It was found in present study that environmental mean variations were very higher than genotypic mean variations for most of the quality characters (Table 2). Hence, test locations were diverse and present results were in harmony with results of Adesole and Yetunde (2016) [1] and Ashwini et al, 2019 [2] . The first interaction principal component i.e IPCA (I) values predicts the stability of the studies genotypes over the target environments.…”

“…Amylose content was responsible for texture and appearance and from the amylose content biplot (Fig. 10) the hybrids viz., A 1 R 5 (2), A 4 R 6 (18) and A 2 R 4 (7) were stable with zero IPCA and low (<24.08%) mean. The performance of hybrids for amylose content was similar in Warangal and Ragolu locations.…”

“…In AMMI I biplot (Fig. 11), A 1 R 5 (2) and MTU 1010 (21) were stable with IPCA score near zero and above grand mean (8.18). Hybrids performance was same in Maruteru and Ragolu locations.…”

“…G×E interaction effects signify that genotypes behave differently across different environments. (Nayak et al, 2008and Mahalingam et al, 2013and Ashwini et al, 2019 [13,12,2] . It was found in present study that environmental mean variations were very higher than genotypic mean variations for most of the quality characters (Table 2).…”

“…According to AMMI I biplot (Fig. 2) for milling per cent, the hybrids A 1 R 3 (1) , A 3 R 7 (14) , A 2 R 5 (8) , A 1 R 5 (2) , A 2 R 7 (9) and check MTUHR 2089 (19) were stable with high mean (> 67.16%) and zero IPCA score. These results were in conformity with the results published by Mahalingam et al, 2013 [12] .…”