Genetic and phenotypic trends of calving interval and age at first calving in a commercial holstein herd
By: Rushdi, Husam al-Din; Ibrahim, Muhammad Abd al-Aziz Muhammad; Abd al-Salam, Samih Abd al-Fattah Muhammad…[et al.]. Egyptian Journal of Animal Production. Vol. 46, no. 2 (Jun. 2009), pp.103-112, 10 p.
Subjects: Animals; Biology; Chromosomes; Pregnancy; Genetics