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Genetic studies of self incompatibility in the garden chrysanthemum, Chrysanthemum morifolium ramat

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Summary

Self incompatibility was investigated in the hexaploid garden chrysanthemum, a member of Compositae. Nine sibling clones selected from a highly compatible cross were all self incompatible. 14.8% of the crosses between these sibs in diallel were compatible, but one sib, 67-111-42, accounted for 10 of the 12 compatible crosses. 67-111-42 was also more compatible than the remaining 8 sibs in crosses to other closely related plants. Crosses of the 9 sibs to 12 unrelated tester clones indicated that none were male or female sterile. Inbreeding via pseudocompatibility was successful in increasing homozygosity at the S loci. The percentage of compatible crosses obtained in 3 sib diallels of I 2 clones from crosses of 67-111-42I 1 plants approached that of the original 9 × 9 diallel, but no one individual accounted for most of the compatible crosses. It was possible to separate the 9 sibs into 9 incompatibility patterns from the pollinations made in this study. The evidence suggests that the self-incompatibility reaction in the garden chrysanthemum is sporophytic and involves more than 1 locus.

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Authors and Affiliations

  1. Department of Horticultural Science, University of Minnesota, St. Paul, Minnesota, USA

    L. W. Drewlow, P. D. Ascher & R. E. Widmer

  2. Bodger Seeds Ltd., Box 607, 93436, Lompoc, Calif., USA

    L. W. Drewlow

Authors
  1. L. W. Drewlow
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  2. P. D. Ascher
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  3. R. E. Widmer
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Additional information

Communicated by H. F. Linskens

Scientific Journal Series Paper Number 7882 of the Minnesota Agricultural Experiment Station.

Lyndon W. Drewlow was a National Science Foundation Trainee.

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Drewlow, L.W., Ascher, P.D. & Widmer, R.E. Genetic studies of self incompatibility in the garden chrysanthemum, Chrysanthemum morifolium ramat. Theoret. Appl. Genetics 43, 1–5 (1973). https://doi.org/10.1007/BF00277824

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  • DOI: https://doi.org/10.1007/BF00277824

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