Effectiveness Of Selection

Traditional selection methods have provided rates of genetic response up to 3% of the mean per year, depending on species and trait.[4] Genetic responses are cumulative and can become appreciable over time. Expected genetic responses are often not realized because of changing economic situations that force producers to change their breeding objectives. Genetic change has been most noticeable in species with short generation intervals such as poultry and swine. Broiler chickens reach market weights significantly earlier on less feed than they did just 20 years ago, for example. Genetic responses in dairy cattle for production traits have been significant due to the ability to pick the best males on an international basis rather than within country.

How To Bolster Your Immune System

How To Bolster Your Immune System

All Natural Immune Boosters Proven To Fight Infection, Disease And More. Discover A Natural, Safe Effective Way To Boost Your Immune System Using Ingredients From Your Kitchen Cupboard. The only common sense, no holds barred guide to hit the market today no gimmicks, no pills, just old fashioned common sense remedies to cure colds, influenza, viral infections and more.

Get My Free Audio Book

Post a comment