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

Sugar content is an important component of fruit quality. Although sugar transporters are known to be crucial for sugar accumulation, the role of genes encoding SWEET sugar transporters in fruit sugar accumulation remains elusive. Here we report the effect of the  SWEET  genes on fruit sugar accumulation in apple. A total of 25  MdSWEET  genes were identified in the apple genome, and 9 were highly expressed throughout fruit development. Molecular markers of these 9  MdSWEET  genes were developed and used for genotyping of 188 apple cultivars. The association of polymorphic  MdSWEET  genes with soluble sugar content in mature fruit was analyzed. Three genes,  MdSWEET2e ,  MdSWEET9b , and  MdSWEET15a , were significantly associated with fruit sugar content, with  MdSWEET15a  and  MdSWEET9b  accounting for a relatively large proportion of phenotypic variation in sugar content. Moreover, both  MdSWEET9b  and  MdSWEET15a  are located on chromosomal regions harboring QTLs for sugar content. Hence,  MdSWEET9b  and  MdSWEET15a  are likely candidates regulating fruit sugar accumulation in apple. Our study not only presents an efficient way of implementing gene functional study but also provides molecular tools for genetic improvement of fruit quality in apple-breeding programs.

Developing gene-tagged molecular markers for evaluation of genetic association of apple SWEET genes with fruit sugar accumulation