Genetic comparison of milk production and composition in three maternal rabbit lines
Visualitza/Obre
Data de publicació
2014-12-18ISSN
1257-5011
Resum
The aim of this study was to compare 3 Spanish maternal rabbit lines (A, V and LP) in terms of milk production and composition. These lines were founded on different criteria but selected for litter size
at weaning. A total of 194 mature does in their third or higher parity were used. The milk yield of does was recorded at 1, 2, 3, 4, 8, 9, 10, 11, 15, 16 and 17 d post-partum (dpp). The milk production traits studied were weekly milk yield (WMY; g/wk) and milk conversion ratio (MCR; grams of litter gain per grams of milk suckled during the first 21 dpp). The milk composition traits studied were fat (%), protein (%), ash (%), lactose (%) and total solids (%). The milk samples to be analysed were collected from each doe at 18 dpp. Data were analysed using single trait mixed and fixed models with and without covariates; the covariates were number born alive (NBA) and doe weight at kindling (DW). The overall mean of WMY, during the first 3 wk, was 1547±16 g/wk. Milk yields during the different lactation weeks were for line A 872±39, 1503±39 and 1865±39 g for first, second and third lactation weeks, respectively. In line V, the corresponding values were 919±35, 1633±35 and 2004±35 g, and in line LP, they were 1043±36, 819±36 and 2254±36 g. Means of MCR were 0.41±0.01, 0.41±0.01 and 0.42±0.01 for A, V and LP lines, respectively. Overall means of fat, protein, ash, lactose and total solids (%) were 14.62±0.17, 11.10±0.07, 1.89±0.04, 2.67±0.12 and 30.27±0.24, respectively. The differences between lines for milk production traits were significant except for MCR, while the differences between lines for milk composition traits were not significant. NBA had significant effects on all milk yield traits but had no significant effects on milk composition traits. DW only had a significant effect on weekly milk yield. The parity order had no significant effect either for milk production traits or milk composition traits in multiparous does, except for ash %.
Tipus de document
Article
Versió del document
Versió publicada
Llengua
English
Matèries (CDU)
575 - Genètica general. Citogenètica general. Immunogenètica. Evolució. Filogènia
636 - Explotació i cria d'animals. Cria del bestiar i d'animals domèstics
Pàgines
8
Publicat per
Universidad Politécnica de Valencia
Publicat a
World Rabbit Science
Citació
EL Nagar, Ayman Gamal Fawzy, Juan Pablo Sánchez, Mohamed Mohamed Ragab, Carlos Balaguer Mínguez, and Manuel Izquierdo Baselga. 2014. "Genetic Comparison Of Milk Production And Composition In Three Maternal Rabbit Lines". World Rabbit Science 22 (4): 261. doi:10.4995/wrs.2014.1917.
Número de l'acord de la subvenció
MICINN/Programa Nacional de Proyectos de Investigación Fundamental/AGL2011-30170-C02-01/ES/DIVERSIDAD GENETICA EN EL CONEJO DE CARNE. INTERACCIONES CON REPRODUCCION, CRECIMIENTO Y SALUD DIGESTIVA/
Programa
Genètica i Millora Animal
Aquest element apareix en la col·lecció o col·leccions següent(s)
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