| Summary: | Crop production is the function of genotype, environment and their interaction (GEI) and evaluation of genotypes in
multi environments helps in identifying their adaptation and stability. Forty five maize hybrids along with their 18 parents
and two checks were evaluated in three environments viz., E1 (Kharif-2019, Instructional Farm, RCA, Udaipur), E2
(Kharif-2019, Agriculture Research Sub-Station, Vallabhnagar, Udaipur) and E3 (Rabi-2019-2020, Instructional Farm,
RCA, Udaipur) in randomized block design with three replications at each environment to assess the phenotypic
stability of genotypes. The mean squares due to genotypes and environments were found significant for all the traits
under study which indicated inherent genetic differences among the genotypes. The mean squares due to G x E
(linear) interaction were found significant for most of the traits under study indicating differences among genotypes
for linear response to varying environments. The MSS due to pooled deviation were found non-significant for all the
traits which indicated major portion of the genotype x environment interaction was formed by predictable component.
The majority of the hybrids depicted non-significant deviations from regression (S2di) for grain yield per plant. It
indicated their predictable response across the environments. A great majority of genotypes revealed non-significant
non-linear estimates (S2di) for different traits which suggested that the prediction of stability was more or less accurate
and reliable. The top three hybrids suitable for all environments (bi≈1) were EI-2653 x EI-102, EI-2639 x EI-670 and
EI-2505 x EI-102 with non-significant S2di values. The hybrids EI-2176-3 x EI-03, EI-2525-2 x EI-03 and EI-2159 x
EI-670 out yielded the best check cultivar CC-1 for grain yield per plant. Thus, these combinations may be exploited
commercially after further multi location yield testing.
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