Identifying hypoprolific boars by examining production records

Ting Qing Zhang, William E. Marsh, Vickie L. King, Lance C. Buoen, George R. Ruth, Alvin F. Weber

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Analysis of litter size performance of 4388 boars used in single-boar matings revealed that 191(4.3%) were hypoprolific according to the criteria of Popescu. Boars classified as normal had sired litters with an average liveborn litter size of 9.984 ± 0.016 standard error (SE) piglets compared to 7.762 ± 0.057 SE (P < 0.0001) for the hypoprolific boars (HPB), a mean reduction of 2.22 piglets. Also, the average number of piglets born dead was significantly greater for the hypoprolific boars as compared to the normal boars (1.0236 ± 0.0309 SE versus 0.9138 ± 0.0085 SE; P = 0.0004). Based on our findings we propose an improved definition of hypoprolificacy based on that of Popescu.

Original languageEnglish (US)
Pages (from-to)21-24
Number of pages4
JournalJournal of Swine Health and Production
Issue number1
StatePublished - Dec 1 1996


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