English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

ADDITIONAL INDEX WORDS. Hydrangea macrophylla breeding, molecular marker, Dichroa, Schizophragma, Platycrater ABSTRACT. Using 14 codominant microsatellite markers that amplify loci across 14 different Hydrangea L. species, we analyzed gene diversity and genetic similarity within Hydrangea. Samples also included Dichroa Lour., Platycrater Sieb. and Zucc., and Schizophragma Sieb. and Zucc. genera to establish their relatedness to Hydrangea species since previous work suggests they may be closely related. Our results support the close affi liation between Macrophyllae E.M. McClint. and Petalanthe (Maxim.) Rehder subsections and their separation from the other Hydrangea species. Most of the Hydrangea species analyzed cluster within their designated sections and subsections; however, genetic distance between species within each subsection varied considerably. Our data suggest that morphological analyses which labeled H. serrata (Thunb.) Ser. as a subspecies of H. macrophylla (Thunb. Ex J.A. Murr.) Ser. are probably more accurate than recent genome size data suggesting H. macrophylla ssp. macrophylla (Thunb.) Ser. and H. macrophylla ssp. ser- rata (Thunb.) Makino are separate species. Gene diversity estimates indicate that 64.7% of the total diversity is due to differences between species and 49.7% of the overall variation is due to differences between subsections. Low diversity suggests a lack of gene fl ow between species and subsections and underscores the diffi culty in making wide hybrids. Since only 35.3% of the genetic variation is common to all species, unique alleles were used to develop a molecular key for unambiguous species identifi cation and interspecifi c hybrid verifi cation. Genetic similarity estimates for all 85 samples suggests a roadmap for introgressing horticulturally important traits from different Hydrangea species. Hydrangeas are the fourth top selling deciduous fl owering shrub in the United States with annual sales in excess of $32 million. Hydrangea macrophylla is the most popular species, but four other members of the genus are cultivated in this country. While most of the H. macrophylla cultivars available today were developed in Europe during the fi rst half of the 20th century, there are currently breeding efforts under way targeted at developing reliable, low-maintenance H. macrophylla with a wide array of desirable ornamental traits. Breeding efforts are also under way to improve H. quercifolia Bartr., H. paniculata Sieb., and H. arborescens L. Despite a recent increase in hydrangea breed- ing and interest in germplasm conservation, relatively little is known about the relatedness between Hydrangea species. The last major revision of Hydrangea taxonomy was carried out in 1957 by McClintock, who established the species designations commonly used today. In an effort to accelerate breeding of new cultivars, we estab- lished simple sequence repeat (SSR) markers for Hydrangea.

Genetic Diversity Estimates for the Genus Hydrangea and Development of a Molecular Key Based on SSR