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A genome-wide linkage analysis for reproductive traits in F2 Large White × Meishan cross gilts

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    Rights statement: © 2014 The Authors. Animal Genetics published by John Wiley & Sons Ltd on behalf of Stichting International Foundation for Animal Genetics. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited

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http://onlinelibrary.wiley.com/doi/10.1111/age.12123/abstract;jsessionid=7588E03B1C279A1CF35162F4B9B7E230.f04t04
Original languageEnglish
Pages (from-to)191-197
Number of pages7
JournalAnimal Genetics
Volume45
Issue number2
Early online date23 Jan 2014
DOIs
Publication statusPublished - Apr 2014

Abstract

Female reproductive performance traits in pigs have low heritabilities thus limiting improvement through traditional selective breeding programmes. However, there is substantial genetic variation found between pig breeds with the Chinese Meishan being one of the most prolific pig breeds known. In this study, three cohorts of Large White × Meishan F2 cross-bred pigs were analysed to identify quantitative trait loci (QTL) with effects on reproductive traits, including ovulation rate, teat number, litter size, total born alive and prenatal survival. A total of 307 individuals were genotyped for 174 genetic markers across the genome. The genome-wide analysis of the trait-recorded F2 gilts in their first parity/litter revealed one QTL for teat number significant at the genome level and a total of 12 QTL, which are significant at the chromosome-wide level, for: litter size (three QTL), total born alive (two QTL), ovulation rate (four QTL), prenatal survival (one QTL) and teat number (two QTL). Further support for eight of these QTL is provided by results from other studies. Four of these 12 QTL were mapped for the first time in this study: on SSC15 for ovulation rate and on SSC18 for teat number, ovulation rate and litter size.

    Research areas

  • litter size, pig, prenatal survival, quantitative trait loci, reproduction

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