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Two-locus theory in recurrent selection for general combining ability in maize

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Summary

Two-locus theory for recurrent selection for general combining ability in maize was developed. The theory featured: (a) recombination of the selfed progeny of selected parents; and (b) linkage disequilibrium in the initial gametic array. The theory indicated: (a) that initial linkage disequilibrium exerts a permanent influence upon selection progress; (b) that interposition of one or more generations of random mating before each cycle reduces the permanent effect in ensuing cycles; and (c) that random mating done before initiation of selection is more efficient in removing the influence of linkage disequilibrium on selection progress than random mating done between subsequent cycles.

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Literature

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  2. Griffing, B. (1962): Consequences of truncation selection based on combinations of individual performance and general combining ability. Aust. J. Biol. Sci. 15, 333–351

  3. Schnell, F.W. (1961) Some general formulations of linkage effects in inbreeding. Genetics 46, 947–957

  4. Sprague, G.F.; Eberhart, S.A. (1977): Corn breeding. In: Corn and Corn Improvement (ed. Sprague, G.F.), chapter 6. Madison, Wise.: Am. Soc. Agron., Inc.

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Communicated by R. W. Allard

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Johnson, G.R. Two-locus theory in recurrent selection for general combining ability in maize. Theoret. Appl. Genetics 61, 279–283 (1982). https://doi.org/10.1007/BF00273786

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Key words

  • Maize
  • Corn
  • Zea mays L.
  • Recurrent selection
  • General combining ability