Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Gene Review:

TNUM - Teat number

Sus scrofa

Wada, Y. et al., Zhang, S. et al., Fernández, A. et al., Hirooka, H. et al., Kim, J.S. et al., et al.

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Disease relevance of TNUM

Least-square analysis revealed quantitative trait loci (QTL) effects for vertebra number on chromosomes 1 and 2; for teat number on chromosomes 1 and 7; for birth weight on chromosome 1; for average daily gain between 4 and 13 weeks of age on chromosomes 9 and 10; for backfat thickness on chromosome 7; and for backskin thickness on chromosome 3 [1].
A total of 11 traits were considered, i.e.: ABT, DT, body weight at 4 (W4w), 8 (W8w) and 22 (W22w) weeks of age, teat number (TEAT), number of good teats (GTEAT), total number of piglets born (TNB), born alive (NBA) and weaned (NW) per litter, and birth to weaning survival rate (SURV) [2].

High impact information on TNUM

Reproductive traits, including number of corpora lutea (ovulation rate), teat number, litter size, and prenatal survival, were recorded for as many as 220 F2 females [3].
Finally, this study shows that this particular IGF2 mutation does not cause the paternally expressed QTL for teat number mapping to the same region of SSC2p as the BFT QTL [4].
Heterosis and epistasis for teat number and fluctuating asymmetry in crosses between Jiaxing and Iberian pigs [5].
Teat number (TN) was recorded in the right and left sides of piglets and analysed by fitting a mixed linear model including the Dickerson's crossbreeding parameters [5].
Effects of teat number on litter size in gilts [6].

Biological context of TNUM

A whole-genome scan for quantitative trait loci affecting teat number in pigs [7].
A whole-genome scan was conducted using 132 microsatellite markers to identify chromosomal regions that have an effect on teat number [7].
The relationship of teat number to seven measures of female reproduction was evaluated in the University of Nebraska Gene Pool population [8].
This study was carried out to investigate the effects of teat number and interval at first estrus and mating on litter size in Duroc, Landrace and Yorkshire gilts [6].

References

Quantitative trait loci (QTL) analysis in a Meishan x Göttingen cross population. Wada, Y., Akita, T., Awata, T., Furukawa, T., Sugai, N., Inage, Y., Ishii, K., Ito, Y., Kobayashi, E., Kusumoto, H., Matsumoto, T., Mikawa, S., Miyake, M., Murase, A., Shimanuki, S., Sugiyama, T., Uchida, Y., Yanai, S., Yasue, H. Anim. Genet. (2000) [Pubmed]
Genetic parameters and genetic trends in the Chinese x European Tiameslan composite pig line. II. Genetic trends. Zhang, S., Bidanel, J.P., Burlot, T., Legault, C., Naveau, J. Genet. Sel. Evol. (2000) [Pubmed]
Mapping quantitative trait loci affecting female reproductive traits on porcine chromosome 8. King, A.H., Jiang, Z., Gibson, J.P., Haley, C.S., Archibald, A.L. Biol. Reprod. (2003) [Pubmed]
The IGF2-intron3-G3072A substitution explains a major imprinted QTL effect on backfat thickness in a Meishan x European white pig intercross. Jungerius, B.J., van Laere, A.S., Te Pas, M.F., van Oost, B.A., Andersson, L., Groenen, M.A. Genet. Res. (2004) [Pubmed]
Heterosis and epistasis for teat number and fluctuating asymmetry in crosses between Jiaxing and Iberian pigs. Fernández, A., Toro, M., Rodríguez, C., Silió, L. Heredity (2004) [Pubmed]
Effects of teat number on litter size in gilts. Kim, J.S., Jin, D.I., Lee, J.H., Son, D.S., Lee, S.H., Yi, Y.J., Park, C.S. Anim. Reprod. Sci. (2005) [Pubmed]
A whole-genome scan for quantitative trait loci affecting teat number in pigs. Hirooka, H., de Koning, D.J., Harlizius, B., van Arendonk, J.A., Rattink, A.P., Groenen, M.A., Brascamp, E.W., Bovenhuis, H. J. Anim. Sci. (2001) [Pubmed]
Inheritance of teat number and its relationship to maternal traits in swine. Pumfrey, R.A., Johnson, R.K., Cunningham, P.J., Zimmerman, D.R. J. Anim. Sci. (1980) [Pubmed]

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