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- Title
The Impact of the Chromosome Alterations in the Reproductive Efficiency of the Domestic Animal Carriers: the Rôle of the Reciprocal Translocations in the Porcine Reproduction.
- Authors
Millán, Miguel Moreno
- Abstract
The chromosome alterations with higher negative impact on reproduction of domestic species, particularly on swine (Sus scrofa domestica), are the reciprocal translocations (rcp). It is clear that its economic consequences are very important if the animals are selected to produce a large number of litters such as those used in insemination centres. Until 2008 a number of 148 reciprocal translocations between two non-homologous chromosomes, as well as three different types of reciprocal translocations in those three non-homologous chromosomes are involved and three different Robertsonian translocations have been described in pigs. The chromosomes involved in the first group were all of the chromosome complement including the sexual ones, appearing involved in the reciprocal translocations among three non-homologous chromosomes the pairs 2, 4, 9, 14 and 15 and the pairs 13, 14, 15, 16 and 17 in the Robertsonian translocations. The effects on the prolificacy in some of the types of these chromosome alterations have been analyzed. In these cases a clear reduction was observed when the females were inseminated with semen from carriers of translocations males. In some of them the percentage of fertility reduction has been calculated, observing in some cases even the sterility of the carrier animals. Other negative effects in some translocations, as the presence of congenital malformations in the newborn piglets, have been observed. Following the literature in sixteen countries from Europe (mainly France and Sweden) plus EEUU, Canada and India these alterations have been detected, without doubt result of their political of systematic studies of breeders.
- Subjects
CHROMOSOME abnormalities; CHROMOSOMAL translocation; GENE fusion; PORCINE somatotropin; MAMMAL reproduction; SWINE; DOMESTIC animal genetics
- Publication
Bulletin of the University of Agricultural Sciences & Veterinary Medicine Cluj-Napoca. Veterinary Medicine, 2009, Vol 66, Issue 1, p1
- ISSN
1843-5270
- Publication type
Article