Genetic Parameters and Genetic Gain for the Reproduction Traits in Latvian Landrace and Yorkshire Sows Populations
Animal and Veterinary Sciences
Volume 2, Issue 6, November 2014, Pages: 184-188
Received: Nov. 13, 2014;
Accepted: Nov. 21, 2014;
Published: Nov. 25, 2014
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Liga Paura, Department of Control Systems, Latvia University of Agriculture, Jelgava, Latvia
Daina Jonkus, Institute of Agrobiotechnology, Latvia University of Agriculture, Jelgava, Latvia
Ugis Permanickis, “Gensoft” Ltd, Saldus District, Latvia
The aim of this study was to estimate genetic parameters for the reproduction traits of Landrace and Yorkshire sows and to analyze the genetic gain in these Latvian swine populations. Records of 14 577 first-parity and 27 359 later-parities Landrace sows and 6039 first-parity and 12 360 later-parities Yorkshire sows born between 2000 and 2012 were included in the analysis. The number of piglets born alive and 21-day litter weight at first and later parities, and weaning–conception interval between the first and second parity were included in the study. The genetic parameters were estimated using a single-trait animal model for the first parity and a single-trait repeatability animal model for later parities using REML procedure. Compared to heritability estimates for number born alive, heritabilities for litter weight were higher in both populations: in the first parity 0.10±0.015 vs. 0.31±0.021 for Landrace, and 0.05±0.016 vs. 0.23±0.028 for Yorkshire; in later parities 0.10±0.010 vs. 0.23±0.013 for Landrace, and 0.10±0.017 vs. 0.20±0.022 for Yorkshire. The heritability of reproduction traits was low; however, during the last ten years, reproduction traits in nucleus herds were improving. The results show that genetic progress in the last five years has been relatively low.
Genetic Parameters and Genetic Gain for the Reproduction Traits in Latvian Landrace and Yorkshire Sows Populations, Animal and Veterinary Sciences.
Vol. 2, No. 6,
2014, pp. 184-188.
Abell C.E., Mabry J.W., Dekkers J.C.M., Stalder K.J. (2012). Genetic and phenotypic relationships among reproductive and post-weaning traits from a commercial swine breeding company. Livestock Science, 145(1–3), 183–188.
Adamec V., Johnson R.K. (1997). Genetic analysis of rebreeding intervals, litter traits, and production traits in sows of the National Czech nucleus. Livestock Production Science, 48(1), 13–22.
Chen P., Baas T.J., Mabry J.W., Koehler K.J., Dekkers J.C.M. (2003). Genetic parameters and trends for litter traits in U.S. Yorkshire, Duroc, Hampshire, and Landrace pigs. Journal of Animal Science, 81, 46–53.
Grandinson K., Rydhmer L., Strandberg E., Solanes F. X. (2005). Genetic analysis of body condition in the sow during lactation, and its relation to piglet survival and growth. Animal Science, 80, 33–40.
Hamann H., Steinheuer R., Distl O. (2004). Estimation of genetic parameters for litter size as a sow and boar trait in German herdbook Landrace and Pietrain swine. Livestock Production Science, 85(2–3), 201–207.
Holm B., Bakken M., Vangen O., Rekaya R. (2005). Genetic analysis of age at first service, return rate, litter size, and weaning-to-first service interval of gilts and sows. Journal of Animal Science, 83, 41–48.
Lundeheim N., Chalkias H., Rydhmer L. (2013). Genetic analysis of teat number and litter traits in pigs. Acta Agriculturae Scandinavica, Section A – Animal Science, 63:3, 121–125.
Lundgren H., Fikse W.F., Grandinson K., Lundeheim N., Canario L., Vangen O., Olsen D., Rydhmer, L. (2014). Genetic parameters for feed intake, litter weight, body condition and rebreeding success in primiparous Norwegian Landrace sows. Animal, 8, 175–183.
Meyer, K. (2010). Wombat. A program for mixed model analyses by restricted maximum likelihood. University of New England, Armidale, Australia.
Serenius T., Sevón-Aimonen M.L., Mäntysaari E. A. (2003). Effect of service sire and validity of repeatability model in litter size and farrowing interval of Finnish Landrace and Large White populations. Livestock Production Science, 81(2–3), 213–222.
Su, G., Lund, M.S., & Sorensen, D. (2007). Selection for litter size at day five to improve litter size at weaning and piglet survival rate. Journal of Animal Science, 85(6), 1385–1392.
Ziedina I., Jonkus D., Paura L. (2011). Genetic and phenotypic parameters for reproduction traits of Landrace sows in Latvia. Agriculturae Conspectus Scientificus 76(3), 219–222.
Veide D., Eiduks U., Bokvalds A. (2010) Latvijā audzēto cūku selekcijas programma. 2011.gadam un tuvākai perspektīvai līdz 2016.gadam. (in Latvian)http://www.ccc.lv/lv/selekcija/jauna%20programma_pec_2010_a_u.pdf