Effect of the breeding system on the genetic structure in threeCephalanthera spp. (Orchidaceae) |
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| Authors: | Renato Scacchi Gilberto De Angelis Rosa Maria Corbo |
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| Institution: | (1) CNR Centre of Evolutionary Genetics, Department of Genetics and Molecular Biology, University  La Sapienza , P. le A. Moro 5, I-00185 Rome, Italy;(2) Promoter Committee of the Natural Regional Park of Mounts Lucretili, V. G. B. Vico 20, Rome, Italy |
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| Abstract: | The genetic variation of seven enzymes for a total of nine loci was investigated in three species of terrestrial orchids of the genusCephalanthera:C. longifolia, C. rubra, andC. damasonium. These species are characterized by presenting different breeding types: outbreeding , outbreeding with facultative vegetative reproduction, and inbreeding, respectively. Electrophoretic evidence points to a difference in the behaviour of each of the three species which seems strictly related to the breeding type. On the basis of our resultsC. longifolia behaves as a normal outbreeder, whileC. rubra presents the influence of vegetative reproduction in some populations and not in others.C. damasonium shows a total lack of both among and within populations genetic variation, which is most probably due to the autogamic breeding type. |
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| Keywords: | Angiosperms monocotyledons Orchidaceae Cephalanthera Allozymes electrophoresis genetic variation breeding type |
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