Studies onStreptocarpus - II. Complementary sublethal genes
When the two dominant genesL andE occur together inStreptocarpus Rexii, they give rise to abnormal foliar growth, though flowers and seeds, when produced, are normal. These genes have not been found in twenty other species of the genus. Both occur in wild populations andE has also been found in the garden hybrids derived from species crosses withinRexii some 50 years ago.
Mutations and chimaeras are described. One of the latter gave rise to tetraploids, the first to be recorded in gardenStreptocarpus.
It is considered doubtful whether these genes can play a part in speciation.
Volume 101, 2022
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