Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Identifying early indicator traits for sow longevity using a linear-threshold model in Thai Large White and Landrace females

  • Plaengkaeo, Suppasit (Department of Animal science, Faculty of Agriculture, Khon kaen University) ;
  • Duangjinda, Monchai (Department of Animal science, Faculty of Agriculture, Khon kaen University) ;
  • Stalder, Kenneth J. (Department of Animal Science, Iowa State University)
  • Received : 2019.11.02
  • Accepted : 2020.02.14
  • Published : 2021.01.01
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Abstract

Objective: The objective of the study was to investigate the possibility of utilizing an early litter size trait as an indirect selection trait for longevity and to estimate genetic parameters between sow stayability and litter size at different parities using a linear-threshold model for longevity in Thai Large White (LW) and Landrace (LR) populations. Methods: The data included litter size at first, second, and third parities (NBA1, NBA2, and NBA3) and sow stayability from first to fourth farrowings (STAY14). The data was obtained from 10,794 LR and 9,475 LW sows. Genetic parameters were estimated using the multiple-trait animal model. A linear-threshold model was used in which NBA1, NBA2, and NBA3 were continuous traits, while STAY14 was considered a binary trait. Results: Heritabilities for litter size were low and ranged from 0.01 to 0.06 for both LR and LW breeds. Similarly, heritabilities for stayability were low for both breeds. Genetic associations between litter size and stayability ranged from 0.43 to 0.65 for LR populations and 0.12 to 0.55 for LW populations. The genetic correlation between NBA1 and STAY14 was moderate and in a favorable direction for both LR and LW breeds (0.65 and 0.55, respectively). Conclusion: A linear-threshold model could be utilized to analyze litter size and sow stayability traits. Furthermore, selection for litter size at first parity, which was the genetic trait correlated with longevity, is possible when one attempts to improve lifetime productivity in Thai swine populations.

Keywords

Acknowledgement

This study was financially supported by the Research and Researcher for Industry of the Thailand Research Fund (TRF) (Grant no. PHD60I0007), Khon Kaen University (KKU), and the Research and Development Center Betagro Group in Thailand. The data for this project was supplied by Betagro Agro Industry Company Limited, Bangkok 10210, Thailand.

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