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South Dakota | Your experiment is stupid. Find the small circumference heifers and breed them to a low bw bull and see what happens? No ones arguing that pelvic circumference isn’t correlated with calving ease. Again, pelvic circumference is lowly heritable and highly correlated with cow size. Read that sentence again. I’ll break it down Barney style for you. Lowly heritable means unlikely to be passed on. That’s the reason it has a high degree of correlation to cow size, big cow:big pelvic measurements. You want cows with big pelvic measurements, go simental. You forget that the other component of a breeding soundness exam is tract scoring and In the past immature tracts, freemartins, etc was the majority of heifers that failed the breeeding soundness exam for me. OCC comes to mind as a program that has eliminated enough genetic variation to where the pelvic circumference is going to be largely standardized due to low genetic variation.
Edited by blacksand 3/22/2019 05:57
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Pelvic measuring heifers?
