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From Cow Calf Weekly (long)
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<blockquote data-quote="Anonymous" data-source="post: 6626"><p>There are 2 major benefits of crossbreeding. The first one and the one you tend to hear about the most is hybrid vigor. Heterosis (the same term as hybrid vigor) is the term for ALL the increases in production (longevity, reproductive performance, adaptability and survival, AND growth EFFICIENCY), some research has documented the benefits to be as high as 36% greater than straightbreeding.</p><p></p><p>The second major benefit is termed "breed complementarity" which essentially means you produce better cattle for certain situations and environments by combining the strengths of more than one breed while minimizing the weaknesses of component breeds</p><p></p><p>Frame size is not a measurement of growth rate and/or growth efficiency. Frame size is how tall an animal is at any certain point in time. So if you are measuring growth in pounds of gain per unit time, the answer to your question is none. If you are trying to measure "growth" by measuring the height of animals, then crossing a large framed animal with a smaller frame animal would yield offspring of an intermediate frame score (on the average).</p><p></p><p>You are right, crossbreeding is only a tool, as is selection. These are "genetic" tools. Records and management practices are not the same. They are practices that can increase the accuracy of your selection or enhance or hinder your use of genetic tools.</p><p></p><p>Most cattle production tools and practices are not exclusive, you don't pick, on an "either or" basis. The best cattle breeders utilize all the tools and practices at their disposal.</p><p></p><p>> How much of the extra growth is</p><p>> due to increase in frame size?</p><p>> Crossbreeding is a great tool for</p><p>> producers but it does not replace</p><p>> good records and management</p><p>> practices.</p><p></p><p>> pat</p></blockquote><p></p>
[QUOTE="Anonymous, post: 6626"] There are 2 major benefits of crossbreeding. The first one and the one you tend to hear about the most is hybrid vigor. Heterosis (the same term as hybrid vigor) is the term for ALL the increases in production (longevity, reproductive performance, adaptability and survival, AND growth EFFICIENCY), some research has documented the benefits to be as high as 36% greater than straightbreeding. The second major benefit is termed "breed complementarity" which essentially means you produce better cattle for certain situations and environments by combining the strengths of more than one breed while minimizing the weaknesses of component breeds Frame size is not a measurement of growth rate and/or growth efficiency. Frame size is how tall an animal is at any certain point in time. So if you are measuring growth in pounds of gain per unit time, the answer to your question is none. If you are trying to measure "growth" by measuring the height of animals, then crossing a large framed animal with a smaller frame animal would yield offspring of an intermediate frame score (on the average). You are right, crossbreeding is only a tool, as is selection. These are "genetic" tools. Records and management practices are not the same. They are practices that can increase the accuracy of your selection or enhance or hinder your use of genetic tools. Most cattle production tools and practices are not exclusive, you don't pick, on an "either or" basis. The best cattle breeders utilize all the tools and practices at their disposal. > How much of the extra growth is > due to increase in frame size? > Crossbreeding is a great tool for > producers but it does not replace > good records and management > practices. > pat [/QUOTE]
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