This study was conducted at the PNGUNRE poultry farm using 270 birds in 2018. Muscovy ducks are hardy waterfowls existing with variations in phenotypic characteristics. Five phenotypes ( n=25 lavender, n=20 chocolate, n= 56 silver, n=59 black and n=110white) by plumage colour where distinctively sampled and characterized. Measurements on body weight, neck length and neck height were used as the parameters for comparison on five phenotypes. Analysis was done using SPSS version 16.0 involving Duncan’s multiple tests to separate the means while Pearson’s correlation coefficient was performed to find relationship between the parameters. Negative correlation (-.137*) was observed between plumage colour and BW,NL,NH and BL. The sexual dimorphism accounted for -.402**, -.238**, -.315** and -.172** at high significant (P<0.01) of BW, NL, BL and BH respectively. There’s high negative correlation of sex on the traits measured. Plumage colour cannot be used to select BW, BL BH and NL for breeding purposes. Dimorphism in ducks has a negative effect on the assed parameters accept NL. Separate study on the effect of sex on the measured parameters is required.

Keywords : Muscovy Duck, Body Weight, Body Length, Body Height, Neck Length, Plumage Colour, Correlation, Phenotype,