Abstract
The role of imprinting in body composition was investigated in an experimental cross between Chinese Meishan pigs and commercial Dutch pigs. A whole-genome scan revealed significant evidence for five quantitative trait loci (QTL) affecting body composition, of which four were imprinted. Imprinting was tested with a statistical model that separated the expression of paternally and maternally inherited alleles. For back fat thickness, a paternally expressed QTL was found on Sus scrofa chromosome 2 (SSC2), and a Mendelian-expressed QTL was found on SSC7. In the same region of SSC7, a maternally expressed QTL affecting muscle depth was found. Chromosome 6 harbored a maternally expressed QTL on the short arm and a paternally expressed QTL on the long arm, both affecting intramuscular fat content. The individual QTL explained from 2 p to 10 f the phenotypic variance. The known homologies to human and mouse did not reveal positional candidate genes. This study demonstrates that testing for imprinting should become a standard procedure to unravel the genetic control of multifactorial traits.
| Original language | English |
|---|---|
| Pages (from-to) | 7947-7950 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Volume | 97 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 2000 |
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de Koning, D. J., Rattink, A. P., Harlizius, B., van Arendonk, J. A. M., Brascamp, E. W., & Groenen, M. A. M. (2000). Genome-wide scan for body composition in pigs reveals important role of imprinting. Proceedings of the National Academy of Sciences of the United States of America, 97(14), 7947-7950. https://doi.org/10.1073/pnas.140216397