author(s)
Sidharth Prasad Mishra, Chinmoy Mishra and Jagyandatt Pati

abstract
The genetic analysis of reproductive parameters of the Nandankanan Zoological Park (NZP) tigresses (n=342) were investigated from pedigree data from 1960 till June, 2016. The mean (±SD) of inbreeding coefficient, birth weight, age at first cubing, age at first mating, number of cubs born in lifetime, number of cubs live up to adulthood, average litter size, total number of white cubs born, and sex ratio (Male : Female) showed highly significant (P<0.01) difference between the normal and white tigers. By PCA, it was illustrated that total cumulative variation of 78.10 % develop by four factors i.e., PC1, PC2, PC3 and PC4 eigen value of 4.013, 2.52, 2.19 and 1.23, respectively. Most of the reproductive parameters were found to be high to moderately heritable, that means the tigress were more genetically active to produce new progeny with most desirable genes for next generation.