Estimation of genetic parameters and trends in performance traits of Rambouillet sheep

Genetic parameters and trends are very important to know about the genetic gain effectiveness of selection. The present study was conducted on 8,872 records Rambouillet sheep maintained at Government Sheep Breeding Research Farm, Reasi, Jammu, Jammu Kashmir, India over a period 20 years from 1996 2015. performance traits studied in investigation were birth weight (BW), weaning (WW), nine-month body (9BW), twelve month or yearling (YW) annual wool production (AWP). Heritability, correlations estimated. Estimates heritability ranged medium (0.192 for AWP) high (0.720 9BW). highest phenotypic obtained between 9BW YW indicating that early selection basis will improve simultaneously. AWP had negative with all other except WW. positive BW WW; 9BW, AWP. negative. effect trend non-significant traits. R2 value low medium. YW. indicate environment plays an role controlling different sheep.