Genetic Variability, Heritability and Genetic Advance in Grapefruit (Citrus paradisi) Genotypes

Variability assessment of six grapefruit varieties was done based on 22 qualitative and quantitative morphological characters. The maximum variability was observed for leaf lamina width (CV =12.03), while the minimum variability was noted for petiole wing width (CV = 0.13). The maximum heritability (h2 ) coupled with maximum genetic advance percentage of mean (GA) was observed for petiole wing width (100 and 45.96, respectively), followed by spine length (100 and 25, respectively) and rootstock diameter (85 and 21.44, respectively), while the minimum heritability coupled with the minimum genetic advance percentage of mean was observed for leaf lamina length (7 and 0.70, respectively).