Estimation of Genetic Parameters for Persistency of Lactation in Sahiwal Dairy Cattle
Ali Zurwan1,*, Muhammad Moaeen-ud-Din2, Ghulam Bilal2, Zia-ur-Rehman1,2 and Muhammad Sajjad Khan1
1Institute of Animal Sciences, Faculty of Animal Husbandry, University of Agriculture, Faisalabad-38040, Pakistan
2Laboratories of Animal Breeding and Genetics, Faculty of Veterinary and Animal Sciences, PMAS Arid Agriculture University, Rawalpindi, 46300, Pakistan
* Corresponding author: drmoinawan@gmail.com
Ludwick and Petersen’s Persistency Index
Mahadevan’s Persistency Index