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Keywords = USMARC Twinner cattle

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8 pages, 152 KB  
Case Report
A Case Report of Commercial Production from High Fecundity Livestock in a Pastoral Environment
by Leo James Cummins
Animals 2025, 15(11), 1583; https://doi.org/10.3390/ani15111583 - 29 May 2025
Viewed by 806
Abstract
In the Australian primary industries, beef cows are recognized as monovular while sheep are less so, and both seem likely to benefit from increased litter sizes. In both species, there have been genetic developments causing increased litter sizes, but these have only had [...] Read more.
In the Australian primary industries, beef cows are recognized as monovular while sheep are less so, and both seem likely to benefit from increased litter sizes. In both species, there have been genetic developments causing increased litter sizes, but these have only had limited commercial application. This report describes the commercial use of the FecB (Booroola) gene in prime lamb ewes to increase lambing percentage from the 111% typical of the local industry to 145% in the flock described. In cattle, the use of the USMARC Twinner selection line genetics raised calf weaning percentage from the 89% typical of the local industry to 115% in the herds described. Full article
(This article belongs to the Special Issue Investigating Twin Pregnancies in Mono-Ovulatory Species)
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