Finlay and Wilkinson's stability parameters and genotype ranks for yield of 12 cashew (Anacardium occidentale L.) selections in Nigeria. (137)
Keywords:Cashew genotypes, Stability parameters, Ochaja, Yield performance, Nigeria
AbstractNine exotic cashew (Anacardium occidentale L.) selections (A. Madras 4/61, Trichur l, T.A.O. 40, Brazil/244, U.O. 185, A. Madras 261, Brazil 12, Kottakaraka 1/1, and Challode) introduced from Brazil and India and three local varieties (SC Eruwa 70, SC lwo 36, and Oghe 50) were evaluated in Ochaja, Kogi State, Nigeria, for their yield performance and stability using Finlay and Wilkinson's stability parameters. The mean nut yield among the genotypes ranged between 3.44 ± 0.24 kg (Trichur 1) and 16.25 ± 0.48 kg (A. Madras 261) tree-1 yr-1. The two genotypes that most satisfied the criteria for high yield and stability based on yield performance and Finlay and Wilkinson's b-value as indicated by their rank sums, were T.A.O. 40 and A. Madras 261. T.A.O. 40 was, however, considered the best genotype because of its relatively bigger nut and apple size. The least stable genotypes were Oghe 50, SC Eruwa 70, and A. Madras 4/61. The study showed that stability methods might be helpful in selecting superior cashew genotypes with consistency of yield performance across different agro-ecological zones in Nigeria.