Stability models regulate the adaptation of male sterility-based chilli hybrids for agro-ecologically diverse regions

The Chilli ( Capsicum annuum var. annuum L.) cultivars are highly sensitive to diverse agroclimatic conditions. The research presents a significant contribution by identifying high-yielding and stable hybrids for wider adaptability using genetic male sterility (GMS). The study was conducted in seven diverse environments by following conventional farming under field conditions in five locations of North-western Himalaya along with naturally ventilated polyhouse conditions using conventional and natural farming practices using 12 GMS based hybrids and 4 check varieties to identify the phenotypic stability for yield and its related attributes. The experiment was conducted in randomized block design replicated thrice during summer season of 2021 in the respective environments. Joint regression analysis revealed significant Genotype (G) × Environment (E) interaction and E + (G × E) for all the traits. Eberhart and Russel model revealed stability of seven hybrids for green fruit yield with DPCHYB 10 (627.68 g/plant) and DPCHYB 5 (583.50 g/plant) got top ranks. G + GE biplot model extrudes that Berthin (E5) was the most representative and discriminating environment for green fruit yield and was suitable for selecting generally adapted hybrids. Mean vs stability biplot indicated the superiority of DPCHYB 10 and DPCHYB 5 for green fruit yield. ‘Which won where’ polygon view of GGE biplot model showed that DPCHYB 10 was the most stable and high yielding hybrid with wider adaptability in most of the environments except Palampur (E1) where DPCHYB 5 was the most responsive and adaptive.