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Although many carnation cultivars are already grown, demand from growers and consumers for new cultivars is high. To increase the efficiency of breeding, DNA markers have been used in various agronomic crops. However, DNA markers for breeding are scarce in ornamental plants, including carnations. In the past decade, in order to improve selection efficiency for breeding bacterial wilt (CBW)-resistant carnations, tightly linked DNA markers and simple-sequence repeat-based genetic linkage maps have been developed. The CBW-resistant standard-type cultivar ‘Karen Rouge’ and spray-type cultivar ‘Momokaren’ were bred by DNA marker-assisted selection. Additionally, the development of next-generation sequencing technology has made the development of DNA markers and high-density linkage maps more cost-effective and efficient. In this chapter, linkage maps and useful markers developed for carnation breeding are summarized. |
