Contextualization: Colombian hair sheep [CHS] are animals of great importance, because their genetic material has been adapting for more than 500 years to the environment; besides, these have a transcendental role in Colombia contribution food security and family economy. However, part production country presents low parameters. Knowledge gap: ignorance (CHS) biotypes’ productivity led underval...

A total of 625 progenies New Zealand White rabbits, kept at Sakha Experimental Rabbits, Kafr-El-Sheikh, Government, belonging to Animal production Research Institute, Ministry Agriculture, Dokki, Cairo, Egypt, during 2010-2017 were used estimate the genetic parameters and phenotypic trends for some reproductive productive traits. Traits studied litter size birth (LSB), weight (LWB), kit body fo...