Genotypes x environment interactions and stability analysis of sugarcane clones (Saccharum spp.) by AMMI model in sub-tropical regions of India

Abstract

Fifteen elite sugarcane clones along with five zonal
standard varieties were evaluated under four production
environments in the sub-tropical climate. AMMI model was
employed to assess the magnitude of Genotype x
environment (GE) interaction and the stability of sugarcane
clones across environments. AMMI analysis revealed the
significant difference among tested clones and
environments. It has shown 43.17% of the variation in cane
yield which could be attributed to environmental effects.
The genotypic effects accounted for 45.76% variation with
11.06% of GEI effects. The early maturing high sugar
varieties, Co 0238 and Co 0118 gave 89.27 t/ha and 80.11 t/
ha cane yield, respectively and thus considered as widely
adapted genotypes across the environments and can be
recommended for commercial cultivation in sub-tropical
region. Co 98014 and Co 05011 exhibited better adaptability
in ratoon trials and appeared to be suitable for multiple
ratoon. Considering IPCA score, CoS 767 was most stable
standard (check) across the environments. With regards to
the environments, E2 (spring season plant crop) and E1
(autumn season plant crop) placed on the upper right half
of perpendicular axis of AMMI biplot due to the positive
interactions and hence both E2 and E1 are the favourable
environments for obtaining higher cane yield.