Proportion of the Variation in Genetic Composition in Backcrossing Programs Explained by Genetic Markers

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Abstract
For a randomly mating backcrossing population, the proportion of the variance of genetic composition explained by genetic markers was derived for any generation. It was shown that nearly all the variance can be explained by placing three or more markers per chromosome. It was found that a single marker in the middle of a chromosome explains more variance than two markers at the ends.