In vitro and in vivo genetic parameters and character associations in potato

Relative behaviour of genetic parameters and character associations for in vitro and in vivo systems was studied by evaluating 22 potato genotypes for seven morpho-agronomic characters under six in vitro and four in vivo conditions. There was considerable similarity between in vitro and in vivo systems with regard to pattern of coefficient of variation (both phenotypic and genotypic), heritability (broad sense), genetic advance (as% of mean) and correlation coefficients (both phenotypic and genotypic) between characters. The magnitude of various genetic parameters was higher under in vitro than in vivo conditions, particularly for tuber yield and its components. Treatment-to-treatment variation in genetic parameters and character associations was higher under in vivo than in vitro conditions. In vitro selection for agronomic characters in potato may be possible. This revised version was published online in July 2006 with corrections to the Cover Date.