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Interaction among sporophytic S loci in self-incompatible garden chrysanthemums

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Summary

Certain parent-progeny crosses were studied to determine whether several S loci acted independently or epistatically to produce incompatibility in garden chrysanthemums, Chrysanthemum morifolium Ramat. The ratios of compatible: incompatible crosses with the original parent, as the pollen parent, were nearly 1:3, 1:1, and 1:1 for the I1, backcross (BC), and BCF2 generations, respectively. In particular, crosses between each progeny and the original parent showed that the number of compatible crosses was much higher than expected if each S locus acted independently. Therefore, interaction must have existed among pollen S alleles from different S loci. This information was used to demonstrate a method by which garden chrysanthemums could be inbred by sib mating in successive generations.

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Authors and Affiliations

  1. Department of Horticultural Science and Landscape Architecture, University of Minnesota, 55108, St. Paul, MN, (USA)

    L. C. Stephens, P. D. Ascher & R. E. Widmer

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  1. L. C. Stephens
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  2. P. D. Ascher
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  3. R. E. Widmer
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Scientific Journal Series Paper Number 13,001 of the Minnesota Agricultural Experiment Station.

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Stephens, L.C., Ascher, P.D. & Widmer, R.E. Interaction among sporophytic S loci in self-incompatible garden chrysanthemums. Euphytica 33, 623–631 (1984). https://doi.org/10.1007/BF00021890

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  • DOI: https://doi.org/10.1007/BF00021890

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