- Milk Per Season He Keeps 50 Of His Heifers As Replacements This Makes His Selection Intensity 0 80 The Heritability 1 (93.41 KiB) Viewed 28 times
milk per season. He keeps 50% of his heifers as replacements. This makes his selection intensity 0.80. The heritability
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milk per season. He keeps 50% of his heifers as replacements. This makes his selection intensity 0.80. The heritability
milk per season. He keeps 50% of his heifers as replacements. This makes his selection intensity 0.80. The heritability of milk yield is 0.25 which makes the accuracy 0.5. The variation in the population for milk production is 1,100lbs. His current generation interval is 6 years. A. What is his current rate of genetic change? B. What if he keeps 80% of his heifers? (changes selection intensity to 0.35 and reduces generation interval to 4.5 years) C. What if he only replaces 20 percent of his heifers each year? (this changes selection intensity to 1.4, improves accuracy with more records to 0.6 but increases generation interval to 7.5 years) D. Calculate the genetic change for each scenario and explain which is the better approach and why. Remember the equation: ΔBV∣t=LγBV,BViσBV
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