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genetics.107.074146v1
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doi:10.1534/genetics.107.074146
A more recent version of this article appeared on July 1, 2007.
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Impact of interpopulation divergence on additive and dominance variance in hybrid populations
Jochen C Reif 1, Frank M Gumpert 1, Sandra Fischer 1 and Albert E. Melchinger 1*
1 University of Hohenheim
* To whom correspondence should be addressed. E-mail: melchinger{at}uni-hohenheim.de.
Submitted on April 3, 2007
Revised on May 5, 2007
Accepted on 5 May 2007
We present a theoretical proof that the ratio of the dominance versus additive variance decreases with increasing genetic divergence between two populations. While the dominance variance is the major component of the variance due to specific combining ability, the additive variance is the major component of the variance due to general combining ability. Therefore, we conclude that interpopulation improvement becomes more efficient with divergent than with genetically similar heterotic groups, because performance of superior hybrids can be predicted based on general combining ability effects.
Key Words: additive and dominance variance, genetic divergence, heterotic groups, interpopulation improvement
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