Summary
Two species in the genus Gibasis section Heterobasis have been examined to confirm their incompatibility reaction and to determine its genetic control. Five individuals of G. oaxacana (2x=16) from a single Mexican population (Hunt 8175) were found to be self-incompatible. Three accessions of tetraploid cytotypes (4x=32; Hunt 7012, 7072 and 7160) and two accessions of hexaploid cytotypes (6x=48; Jones 72 and Bacigallipo 711257) of Gibasis geniculata were found to be self-compatible. Analysis of an F1 population raised from an intercross between two heterozygous genotypes of G. oaxacana was consistent with an hypothesis that self-incompatibility is controlled by a single multiallelic gene acting gametophytically in the pollen.
Unilateral incompatibility was found in crosses between G. oaxacana and G. geniculata.
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Owens, S. Incompatibility studies in the genus Gibasis section Heterobasis D. R. Hunt (Commelinaceae). Heredity 39, 365–371 (1977). https://doi.org/10.1038/hdy.1977.78
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DOI: https://doi.org/10.1038/hdy.1977.78
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