Genetic Variability and Correlation Studies in Some Varieties of Cucumber

U. Afangideh, E. A. Uyoh

Abstract


Eleven exotic and six indigenous cultivars of cucumber (Cucumis sativus) were evaluated for yield and quality
characteristics. Total fruit yield was significantly higher (P<0.01) in the indigenous cultivars; while some exotic
cultivars like W12757, Ashley, Addis and Regal had longer vines (P< 0.01) and fewer days to flowering (P <
0.05). Linear correlation analyses showed that mean fruit number per plant and length of vine at 6 weeks were
significantly and positively associated with yield (P < 0.001 and 0.01, respectively). Genetic analyses indicated
that Phenotypic Coefficients of Variation (PCV) were higher than genotypic coefficients of variation in all of the
attributes studied; while length of vine at 6 weeks had the highest genetic gain. High heritability (broad sense)
estimates of 94% and 85% were obtained for days to flower initiation and days to 50 percent flowering,
respectively. Length of vine at 6 weeks, days to flower initiation and days to 50% flowering had high to
moderate genotypic variance, high to moderate heritability and greater genetic gain. Selection can, therefore, be
based on these characters, and their phenotypic expression would be a good indicator of their genotypic
potentiality.

Keywords


Phenotypic Coefficient of Variation (PCV), Genotypic Coefficient of Variation (GCV), Genetic Advance, Heritability (broad sense), Cucumis sativus.

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