A number of 5573 body weight records of 1523 lambs from 164 sires and 875 dams were
used to estimate additive genetic, direct and maternal permanent environmental effects on
growth from 1 to 300 days of age. The data were collected during the period 1993–2007
from the rearing and breeding station of Zandi sheep in Tehran, Iran and analyzed fitting the
random regression (RR) models. Fixed effects in models included age of dam, sex of lamb,
type of birth and year of birth. The independent variables were Legendre polynomials of age …