Abstract
Mandevilla is an ornamental crop with a bright future worldwide because of its high commercial acceptance and added value. However, as with most ornamental species, there are few molecular tools to support cultivar breeding and innovation. In this work, we report the development and analysis of 20 new Simple Sequence Repeat (SSR) markers in Mandevilla. Microsatellites were isolated from two enriched small-insert genomic libraries of Mandevilla × amabilis. The diversity parameters estimated after their amplification in a group of 11 commercial genotypes illustrate the effect of two opposite drifts: the high relatedness of cultivars belonging to the same commercial group and the high divergence of other cultivars, especially M. × amabilis. Based on their different band patterns, six genotypes were uniquely distinguished, and two groups of sport mutations remained undistinguishable. The amplification of the SSRs in three wild species suggested the existence of unexploited diversity available to be introgressed into the commercial pool. This is the first report of available microsatellites in Mandevilla. The development process has provided some clues concerning the genome structure of the species, and the SSRs obtained will help to create new products and to protect existing and upcoming plant innovations.
Highlights
Mandevilla, called Dipladenia, is a Brazilian ornamental plant that was introduced into the European market approximately 150 years ago under the commercial name of “Brazilian Jasmine”.Until 1955, its growth was restricted to experienced English gardeners and it was spread throughout Europe by Danish horticulturists
81 clones showing a positive signal after their hybridization with the (CT)15 probe were sequenced, and sixty-six clones (81%) generated readable sequences
Despite the wide applicability of Simple Sequence Repeat (SSR) markers in plant genetics, their development remains a major bottleneck in understudy species, which include most of ornamental plants
Summary
Mandevilla, called Dipladenia, is a Brazilian ornamental plant that was introduced into the European market approximately 150 years ago under the commercial name of “Brazilian Jasmine”. Until 1955, its growth was restricted to experienced English gardeners and it was spread throughout Europe by Danish horticulturists. This plant can be found covering balconies, trellises, arbors, and landscapes, adding a tropical flair to any outdoor space. The Mandevilla commercial scene has changed significantly; the increasing demand in the European market has being accompanied by an expansion into the American, Asian and Australian markets. The extraordinary rise in the number and variety of commercial genotypes available, from approximately 10 to approximately
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