Indian Journal of Plant Genetic Resources

Genetic variability, heritability, genetic gain, GCV, PCV and correlation studies were carried out in 18 genotypes of pecan (Carya illinoensis Koch.). The maximum range was observed in traits kernel percentage (40.20–63.46%) and minimum range was recorded in traits shell thickness (0.53–1.26 mm). The coefficient of variance for different traits varied from minimum (6.74) in nut width to maximum (34.97) in shell thickness. High heritability was found for traits nut length (98.7), nut weight (97.68), nut width (95.51), nut height (95.00) and kernel percentage (92.41). High GCV (44.49) was exhibited by kernel weight, nut weight (43.84) and moderate for nut length (29.23) and kernel percentage (24.21), PCV was estimated highest for kernel weight (52.74), nut weight (44.36) and moderate for nut length (29.45) and kernel percentage (25.18). The traits shell thickness and nut width exhibited low GCV (0.73) and PCV (12.97) respectively. The nut weight was positively correlated with the nut length, nut width, kernel weight, shell thickness and shell weight, whereas it had negative correlation with the kernel percentage.