Genotype x environment interaction and stability in promising elite clones of yield potentiality in respect to cane and sugar yield

Abstract

The present investigation was carried out to determine the relative performance of yield potential, stability and adaptability of promising sugarcane (Saccharum officinarum L.) varieties and identify promising once. Seven varieties were evaluated in randomized complete block design with three replications during spring season of 2015-16, 2016-17, 2017-18, 2018-19 & 2019-20 at Agricultural Research station, Ummedganj, Kota. The pooled analysis of variance showed highly significant (p < 0.01) differences for genotypes (G), environments (E) and G x E interaction. The mean cane & sugar yield (t/ha.), regression coefficient (bi) and deviation from regression (S2d) used to identify the stability and adaptability of popular varieties. Based on stability parameters and over all mean performance of cane & sugar yield, variety Co 0238 has high mean for both cane yield and sugar yield (83.05, 10.17) with bi =1.0 and non-significant s2d = 0, indicated that this varieties found better responsive to all the environments and were considered as stable varieties. Whereas the genotype Co 05009 produced high mean yield (79.64, 9.72), bi >1 with non significant s2d, indicated below average stability, such genotypes tend to respond favorably to better environments but give poor yield in unfavourable environments. Hence, these genotypes were suitable for favorable environments. Variety CoS 8436 having low mean ((73.83, 8.70) for cane & sugar yield, bi < 1 with non significant s2d value, indicated that genotype suitable for poor environment.