Southdown versus Suffolk sire breed effects on numbers and traits of crossbred lambs

摘要: Abstract Oestrus was synchronised in 36 groups of 25 ewes each 2 years. At and for 3 weeks following the second oestrus, an intact Suffolk Southdown ram were run with group ewes. For Year Ilambings, South down rams sired approximately equal numbers lambs, but 2, nearly two-thirds lambs. Of 597 sets twins that could have been mixed-breed paternity, only 200% had both a Suffolk-sired Southdown-sired lamb. There no evidence being born or reared co-twin different breed paternity affected lamb's pre-natal pre-weaning growth.