Jornal de Bioquímica e Fisiologia Vegetal
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Temporal Climatic Comparison of Various Narc Sunflower Hybrids Based on Their Yield Stability

Khalid Khan*, Ihsaan Ullah, Haris Khurshid, Fazal Yazdan, Muhammad Jhanzaib, Ahsan Mukhtiar, Badsha Alam

Since, the inception of breeding research on sunflower inbred lines, genotype by environment interaction remain the main imbroglio. To overcome this problem, local hybrids have been developed through novel cytoplasm male sterile line (A, B and R lines) system; their selections were based on evaluation of Genotype × Environment interaction (G × E) in multi environmental trials. Thus, in the present study, 10 sunflower hybrids were evaluated for grain yield in three consecutive years 2015, 2016 and 2017 in replicated trials, in order to elucidate diverse genotypes against that particular environment. Among these hybrids NARC-229 had maximum yield (4.78 tons ha-1) followed by this ORI-114 (4.26 tons ha-1) across all environments. ANOVA of mean data expose (20%) of total variability in sunflower grain yield was contributed by that variable agro ecological zone, while year-on-year variation accounted for (13%) variation in the grain yield. Univariate stability indices i.e., CVi (%), bi, βi, and mean absolute rank differences S1 and S2 revealed that hybrid ORI-119, ORI-117 and NARC-225 were stable with consisted seed yield across different environments. Result of the analysis depicted that genotype 0RI-117 was only adoptable, while, genotypes NARC-225 and ORI-116 were stable to wide range of environments. Therefore, environment specific cultivation of suitable genotypes is recommended for higher yield.