Artificial Hybridizations in five species of Chilean Nolana (Solanaceae)
Reciprocal crosses, both intraspecific and interspecific, were made among five Chilean species of Nolana (Solanaceae), a genus native to western South America. With the exception of N. paradoxa, plants of all species used were grown from mericarps collected from wild populations. Self-pollinations were generally not successful, suggesting obligate allogamy. A total of 333 hybridizations were performed, of which 109 were intraspecific and 224 interspecific. Successful intraspecific hybridizations, as measured by formation of fruits, were produced for N. acuminata (83%), N. elegans (94%), N. paradoxa (82%), and N. rupicola (100%), however viable hybrids were only obtained for N. paradoxa. Interspecific combinations resulted in over 80% fruit set, however, viable hybrid success ranged from only 1% to 5%. Crosses included N. elegans x N. paradoxa with 20 viable hybrids, N. paradoxa x N. elegans with two hybrids, N. paradoxa x N. rupicola with seven hybrids, and N. rupicola x N. paradoxa with five hybrids. Exceptions included crosses involving N. aplocaryoides, with up to 20% fruit set. Also, the combination N. paradoxa x N. aplocaryoides with five hybrids, had a 26% success. All interspecific hybrids obtained had N. paradoxa as one of the parents, which could be related to artificial selection for high germination frequency.
American Society for Horticultural Science
Scientific Contribution Number
Freyre, Rosanna; Douglas, Amy C.; and Dillon, Michael O., "Artificial Hybridizations in five species of Chilean Nolana (Solanaceae)" (2005). HortScience. 65.