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Articles | Volume 69, issue 3
Articles | Volume 69, issue 3
https://doi.org/10.5194/aab-69-455-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/aab-69-455-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 69, issue 3
Original study
 | 
27 Aug 2026
Original study |  | 27 Aug 2026

Impact of pedigree completeness on genomic–polygenic evaluations for milk yield, fat percentage, and age at first calving in Thai multibreed dairy cattle

Danai Jattawa, Praew Thiengpimol, Thanathip Suwanasopee, Mauricio A. Elzo, Thawee Laodim, and Skorn Koonawootrittriron

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Short summary
This study investigates the impact of pedigree completeness on genomic–polygenic evaluations for milk yield, fat percentage, and age at first calving in Thai multibreed dairy cattle. By testing nine pedigree omission scenarios, we reveal that genomic data offset moderate gaps, but accuracy and ranking stability collapse when losses exceed 20%. These findings provide novel evidence that robust pedigree recording is vital for reliable genetic progress in tropical smallholder systems.
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