ISHS Acta Horticulturae 813: VI International Symposium on New Floricultural Crops
SCREENING OF GENETIC RESOURCES OF CAMELLIA LUTCHUENSIS FOR FRAGRANT CAMELLIA BREEDING; ANALYSIS OF FLORAL SCENT COMPOUNDS |
| Authors: | N. Oyama-Okubo, N. Tanikawa, M. Nakayama, M. Shibata, K. Suzuki, M. Kondo |
| Keywords: | Camellia lutchuensis, fragrant camellia, aromatic compounds, composition ratio, phenylacetaldehyde, 2-phenylethanol |
| Abstract:
Camellia lutchuensis T. Ito ex Matsum., which is a wild camellia species belonging to subgenus Matacamellia section Theopsis, is distributed around south-west island chain from Amami-oshima to Iriomote Is. in Japan. C. lutchuensis emits the strongest fragrance in the genus Camellia and is used as a plant material for breeding of ornamental fragrant Camellia plants. We compared floral scents of 13 wild lines of C. lutchuensis collected in Okinawa Is. with those of C. lutchuensis line 1118, which is one of the pollen parents of a fragrant camellia cultivar, in order to find improved genetic resources for the breeding. Limonene and 6 aromatic compounds, o- methyl anisate, benzaldehyde, benzyl benzoate, eugenol, methyl salicylate and phenylacetaldehyde were newly identified as well as methyl benzoate, 2-phenylethanol and benzyl alcohol, whose occurrence in C. lutchuensis has been reported. The total amounts of scent compounds in most of 13 wild lines, especially lines 3 and 36, were more than those of the line 1118. Floral scent of the line 36 possessing a high composition ratio of 2-phenylethanol and phenylacetaldehyde with floral note was felt stronger than that of the line 3. Some progenies between the line 1118 and C. japonica, e.g. ‘Himenoka’ bred by NIFS, had similar scent components to the line 1118 and its total amount of scent compounds was more than the line 1118. These results show that scent compound of C. lutchuensis is inherited at the hybrid progeny. The line 36 is a promising genetic resource for breeding of ornamental fragrant Camellia plants. | |
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