Indian Society of Genetics & Plant Breeding

Genotype x environment interaction of near isogenic introgression lines (NIILs) under drought stress and non-stress environments in upland rice (Oryza sativa L.)

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The superior NIILs selected for productivity under artificial
drought condition were evaluated over three drought
stress and three non-stress environments. AMMI based
stability parameter; ASTABi and Rao’s Index of stability
were utilized to interpret the stability among the NIILs
under stress and non-stress environments. The grain yield
was much sensitive and highly influenced by environment
resulting in higher G x E interaction under stress
environments. Pooled deviation was highly significant
indicating the presence of non-predictable components
for grain yield and yield related traits. Based on ASTABi,
RF-55-254 was most stable genotype which was also the
best for grain yield (6613 kg/ha) in non-stress
environments, while it was unstable under stress
environments. The genotype, RF-55-198 was superior for
yield as well as stability in stress environments and for
overall adaptability.

Keywords: AMMI, ASTABi, drought tolerance, upland rice


Year: 2010
Volume: 70
Issue: 3
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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