Genotype x environment interaction and stability analysis of lowland rice genotypes

Abstract

Twenty-one lowland rice genotypes were evaluated for their stability parameters with respect to grain yield in a multi-locational trial at five different sites of Eastern India viz. Central Rice Research Institute, Cuttack (Orissa); OUAT, Bhubaneswar (Orissa); CRS, Masodha (UP); RAU, Pusa (Bihar) and RARS, North Lakhimpur (Assam). Pooled analysis of variance reflects existence of genotype x environment interactions and contribution of both linear and non-linear components to genotype x environment interactions. Through stability parameter analysis, it was found that Rayda B3, CR 778-95 and CR 661- 236 were suitable for all environments. The genotypes Sabita and OR 1358-RGA-4 were suitable for better environments. PSR 1209-2-3-2, CR 780-1937, Ambika, OR 877-ST-4-2, NDR 40055-2-1 and CR 662-2211 were identified for poor environments.Uradjena je procena parametara stabilnosti prinosa dvadeset i jednog genotipa nizijskog pirinca u ogledima postavljenih na pet razlicitih lokacija istocne Indije, i to u Centralnom institutu za pirinac (CRRI), Katak (Orisa); u OUAT, Bubanesvar (Orisa); u CRS, Masoda (UP); u RAU, Pusa (Bihar) i u RARS, Severni Lakimpur (Asam). Ukupna analiza varijanse ukazuje na postojanje interakcije genotip x spoljasnja sredina i doprinosa kako linearnih tako i nelinearnih parametara interakcije genotip x spoljasnja sredina. Analizom parametra stabilnosti prinosa je utvrdjeno da su sorte Rayda B3, CR 778-95 i CR 661-236 bile pogodne za gajenje na svim proucavanim lokalitetima, dok su sorte Sabita i OR 1358-RGA-4 bile pogodne samo za lokalitete sa boljim uslovima spoljasnje sredine. Sorte PSR 1209- 2-3-2, CR 780-1937, Ambika, OR 877-ST-4-2, NDR 40055-2-1 i CR 662-2211 su ocenjene da se mogu gajiti u losijim uslovima spoljasnje sredine.