Simultaneous selection for yield and stability in pigeonpea of north east plain zone of India

Yield improvement is the prime objective of any varietal development programs. Therefore, stability of the yield becomes an important criterion in pigeon pea because it is cultivated in rainfed conditions. For the varietal development program, multi-environment trials are conducted to advance the entries at different stages of the trial and in turn to release as varieties. Multi-environmental trials have generally significant genotype and genotype × environment interactions effect, and different univariate and multi-variate stability methods have been used to study the genotype × environment interactions. The present study comprises fourteen pigeon pea entries of the initial varietal trial that were evaluated at five locations viz. Varanasi, Dholi, Ranchi, Kanpur, and Araul representing the North East Plain Zone of All India Coordinated Research Project on pigeon pea program during Kharif 2020-21. The AMMI model is used for genotype × environment interactions investigation. The combined index Model -I and II were used based on the weighted average for stability and yield components at 50:50 in model-I and 20:80 in model-II respectively. Based on both the combined indices the entries IPA18-33 and IPA203 were recorded as highly stable high-yielding entries for future use.