To study the possibility of producing Muscovy duck (MD) * Game Farm Mallard (GFM) crosses in natural mating, the authors monitored the egg fertility (EF) of MD, GFM and their crossbreeding for one year. A total of 354 sexually mature birds were reared in outdoors pens and kept under natural light. The eggs were collected daily and incubated after a max storage of 7 days (d) (T=11°C, R.H. = 70%). The EF was determined by candling on the 10th d. The results showed that the Ef of MD and GFM differred (90.6% and 97.6% respectively, P<0.01) and the EF of their crosses is lower than purebreeds. All the experimental groups with the exception of GFM, reach their pick EF in the 2nd deposition month.
Fertilità delle uova di anatra muschiata, Germano reale e rispettivi incroci.
BAGLIACCA, MARCO;MARZONI FECIA DI COSSATO, MARGHERITA;
1989
Abstract
To study the possibility of producing Muscovy duck (MD) * Game Farm Mallard (GFM) crosses in natural mating, the authors monitored the egg fertility (EF) of MD, GFM and their crossbreeding for one year. A total of 354 sexually mature birds were reared in outdoors pens and kept under natural light. The eggs were collected daily and incubated after a max storage of 7 days (d) (T=11°C, R.H. = 70%). The EF was determined by candling on the 10th d. The results showed that the Ef of MD and GFM differred (90.6% and 97.6% respectively, P<0.01) and the EF of their crosses is lower than purebreeds. All the experimental groups with the exception of GFM, reach their pick EF in the 2nd deposition month.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
