Abstract
Amplified fragment length polymorphism (AFLP) analysis was conducted on the wabisuke camellia and its relative camellia species. Genetic polymorphism was identified among the ‘Uraku’ camellia, its offspring ‘Tosa-uraku’ and Camellia japonica, whereas the two accessions of the old ‘Uraku’ showed monomorphism in all the fragments. The results suggested that the two old ‘Uraku’ trees are asexually-propagated clonal strains. The genetic distance between wabisuke cultivars and Chinese camellias and between wabisuke camellias and C. sinensis was much further than that between wabisuke cultivars and Camellia japonica. It has also been suggested that wabisuke camellias can be classified into two subgroups, I-1 and I-2, and that Subgroup I-2 originated from C. japonica, while Subgroup I-1, including ‘Uraku’ (synonym: ‘Tarokaja’), was developed by the repeated hybridization of C. japonica to interspecific hybrids with the Chinese camellias, e.g., C. pitardii var. pitardii, or by the involvement of related species not investigated in this study.
Highlights
Two old ‘Uraku’ camellia tree accessions, 23 wabisuke camellia cultivars, five C. japonica natural accessions, three Chinese relative species and three Japanese tea (C. sinensis) cultivars were used as plant materials (Table 1)
DNA polymorphism among ‘Uraku’, ‘Tosa-uraku’ and wild C. japonica was clearly detected by Amplified fragment length polymorphism (AFLP) analysis, as indicated by the arrows in the figure
Camellias used in the experiment was a male sterile cultivar, so that self-pollination was impossible
Summary
Received: 24 August 2021Accepted: 28 September 2021Published: 30 September 2021Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.Licensee MDPI, Basel, Switzerland.Attribution (CC BY) license (https://creativecommons.org/licenses/by/ 4.0/).Wabisuke camellias are a group of ornamental horticultural cultivars developed in Japan that have been praised for their remarkable characteristics, such as early flowering, small single flowers and sterile pistils [1]. The plants have often been used as a decorative flower in the Japanese tea ceremony. ‘Tarokaja’ (C. wabisuke Kitam., formerly C. uraku
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