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UNILATERAL HYBRIDIZATION IN AUREOLARIA RAF. (SCROPHULARIACEAE)
Author(s) -
Bell C. Ritchie,
Musselman Lytton J.
Publication year - 1982
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1982.tb13304.x
Subject(s) - biology , scrophulariaceae , pollen , interspecific hybridization , locus (genetics) , perennial plant , botany , evolutionary biology , genetics , zoology , hybrid , gene
A review of the slowly accumulating data on artificial hybridization in the genus Aureolaria shows a pattern of unilateral hybridization (or unilateral incompatibility) indicative of a type of homomorphic gametophytic self‐incompatibility system, involving multiple S alleles at a single locus, which has been found and genetically analyzed in plants of a few genera of both the Solanaceae and Scrophulariaceae. In such systems, if well developed, the pollen of the self‐compatible (SC) plants (in this case the annual A. pedicularia ) will not grow on the stigma of the self‐incompatible (SI) plants (here the three perennial species of Aureolaria ) but the reciprocal cross would be effective and the hybridization would thus be unilateral. The fact that some SI stigma x SC pollen crosses were successful indicates a relatively recent evolutionary age for the less strongly developed (Sc) system in A. pedicularia.