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Segregation, linkage, and diversity of allozymes in knobcone pine

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Summary

Female gametophytes of knobcone pine were used to study genetic variation at 58 loci in 26 enzyme systems. Mendelian segregation and linkage were tested at 21 loci. Got1, Pgi2, Mnr3, Adh2, and Lap2 were linearly arrayed in a single linkage group. Est and Acp3, and Flest and Lap1, formed two independent linkage groups. Although Mendelian segregation was the rule, several cases of segregation distortion were observed. Pooled over trees, Lap1 and Aap1 showed significant distortion. Of 11 cases of distortion observed for individual trees, 10 showed an excess of common alleles. Pooled over both loci and trees, giving a total sample of 17,183 gametes, the common alleles were significantly overrepresented by 1.1%, and heterogeneity was highly significant. Our results, and others in the literature, suggest that segregation distortion may affect the genetic structure of conifer populations.

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Author notes

  1. S. H. Strauss

    Present address: Department of Forest Science, Oregon State University, 97331, Corvallis, OR, USA

Authors and Affiliations

  1. Department of Forestry and Resource Management, University of California, 94720, Berkeley, CA, USA

    S. H. Strauss & M. T. Conkle

  2. Pacific Southwest Forest and Range Experiment Station, U.S. Forest Service, USDA, P.O. Box 245, 94701, Berkeley, CA, USA

    S. H. Strauss & M. T. Conkle

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  1. S. H. Strauss
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  2. M. T. Conkle
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Communicated by P.M.A. Tigerstedt

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Strauss, S.H., Conkle, M.T. Segregation, linkage, and diversity of allozymes in knobcone pine. Theoret. Appl. Genetics 72, 483–493 (1986). https://doi.org/10.1007/BF00289530

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  • DOI: https://doi.org/10.1007/BF00289530

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