STABILITY ANALYSIS AND G X E INTERACTIONS FOR GREEN FODDER YIELD IN FORAGE MAIZE (ZEA MAYS L.)
J. I. NANAVATI
Main Forage Research Station
Anand Agricultural University,
Ananad-388 110 (Gujarat), India
(Received : 30 January 2016; Accepted : 25 March 2016)
Genotype x environment interactions and stability parameter analysis are of major importance to sort out high yielding and stable hybrids. Forty-five hybrids and 14 parents were evaluated during kharif 2012 (E1), rabi 2012 (E2) and summer 2013 (E3) seasons to identify stability for green forage yield per plant in forage maize. G x E (linear) and G x E (non-linear) were found significant for fresh green stem weight per plant and green forage yield per plant. Among the parents, GWC-0401 had above average stability, thereby specifically adapted to poor environment. Among the hybrids, IC-107121 x GWC-0511 and African Tall x GWC-0401 had average stability, which indicated that these hybrids would be well adapted over range of environments, while the hybrids IC-130726 x GWC-0512, GM-6 x IC-130693, GM-6 x GWC-0512, J-1006 x GWC-0319, J-1006 x GWC-0511 and J-1006 x GWC-0512 had below average stability, thereby specifically adapted to favourable environment, whereas the hybrid IC-130726 x GWC-9603 had above average stability, thereby specifically adapted to poor environment.
Key words: Forage maize, stability, G x E interaction, parents, crosses