geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Statistical tools to detect genetic variation for a sex dimorphism in piglet birth weight


, : Statistical tools to detect genetic variation for a sex dimorphism in piglet birth weight. Journal of Animal Science 89(3): 622-629

Sex differences in birth weight contribute to within-litter variability, which itself is connected to piglet survival. Therefore, we studied whether the sex difference in piglet birth weight is a genetically variable sex dimorphism. For that purpose a linear mixed model including sex-specific additive genetic effects was set up. A hypothesis testing problem was defined to detect whether these genetic effects significantly differ between sexes. In a second step, the effect of sex-linked genes was studied explicitly by partitioning the additive genetic effects into autosomal and gonosomal effects. Furthermore, a definition of heritability for the sex difference of a randomly chosen pair of littermates with opposite sex was given. The proposed models were applied separately to a Landrace and Large White data set. Significant genetic variability for the sex dimorphism was found in Landrace (P = 0.03) but not in Large White (P = 0.10). Heritability estimates were at 3 to 5% depending on the model. The X-chromosomal genetic variation was not significant (P > 0.18) at all, whereas the Y-chromosome significantly (P < 0.01) contributed to the genetic variation in Landrace with a corresponding SD of 34 g. It can be concluded that the sex dimorphism of piglet birth weight is genetically variable and a potential target of genetic improvement.

US$19.90

PMID: 21075967

DOI: 10.2527/jas.2009-2692


Other references

Heffernan, J.T.; Futterman, S.; Kalina, R.E., 1978: Dexamethasone inhibition of experimental endothelial cell proliferation in retinal venules. The observation that endothelial cell proliferation in retinal blood vessels is induced by ocular trauma in rats has been extended to mice. Indomethacin, 10 mg/kg/day, failed to block incorporation of tritiated thymidine into nuclei of venular end...

Duncan, A., 1991: Comments on "Duality of Female Employment in Pakistan". Data problems and substantive issues relating to an article on female employment problems in Pakistan are critiqued. It is noted that the emphasis was on demand factors in explaining the level and pattern of female employment, when it is evident t...

Peteet, J.R.; Brenner, S.; Curtiss, D.; Ferrigno, M.; Kauffman, J., 1998: A stage of change approach to addiction in the medical setting. Despite recent advances in its understanding and treatment, addiction remains a difficult challenge for clinicians within medical settings such as the general hospital. The use of single, traditional paradigms (disciplinary, therapeutic, education...

Gildersleeve, R.; Satterlee, D.; Johnson, W.; Scott, T., 1982: The effects of forced molt temperature on selected steroids in hens. Poultry science 61(12): 2362-2369

West, R.; Gossop, M., 1994: Overview: a comparison of withdrawal symptoms from different drug classes. Whereas early formulations of addictive behaviour placed great emphasis upon withdrawal as a defining feature, current views focus more upon compulsive use as its central characteristic. However, the withdrawal syndrome continues to occupy an impo...

Verzhutskii, B.N.; Bessolitsyna, E.P.; Seryshev, A.A., 1981: Strategy of optimising quantitative relations between autotrophic plants and their consumers. Strategies of preventing outbreaks of insect pests on autotrophic plants are discussed with particular reference to larch [Larix] in Siberia, USSR, which is seriously damaged by Pristiphora wesmaeli (Tischb.) and P. erichsonii (Htg.) as well as by...

Ward, P.A., 1986: Chaos and the new order. Human Pathology 17(6): 539-542

Barrett, P., M.; Clarke, J., B.; Brinkman, D.B.; Chapman, S.D.; Ensom, P.C., 2002: Morphology, histology and identification of the 'granicones' from the Purbeck Limestone Formation (Lower Cretaceous: Berriasian) of Dorset, southern England. The identification of the 'granicones', small, conical and shield-like phosphatic structures with a pustulate surface ornamentation, from the Purbeck Limestone Formation of Dorset, has been problematic for over 130 years. They have been...

Cariani, E.; Fiordalisi, G.; Primi, D., 1992: Hepatitis B virus (HBV) genomic variations in chronic hepatitis. Using PCR we have examined the sequence of the pre-C/C region of HBV from sera of anti-HBe positive, chronically HBV-infected patients. The large majority of sera tested contained a mixture of heterogeneous pre-C sequences with 1-3 non-randomly lo...

Cole, JH., 1979: Diptera of Huntingdonshire (11). Huntingdonshire Fauna and Flora Society Annual Report, 40-46 No. 31