Anthocyanin biosynthetic genes in Brassica rapa |
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Authors: | Ning Guo Feng Cheng Jian Wu Bo Liu Shuning Zheng Jianli Liang Xiaowu Wang |
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Affiliation: | Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Zhongguancun Nandajie No.12, Haidian district Beijing, 100081 P. R. China |
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Abstract: | BackgroundAnthocyanins are a group of flavonoid compounds. As a group of important secondary metabolites, they perform several key biological functions in plants. Anthocyanins also play beneficial health roles as potentially protective factors against cancer and heart disease. To elucidate the anthocyanin biosynthetic pathway in Brassica rapa, we conducted comparative genomic analyses between Arabidopsis thaliana and B. rapa on a genome-wide level.ResultsIn total, we identified 73 genes in B. rapa as orthologs of 41 anthocyanin biosynthetic genes in A. thaliana. In B. rapa, the anthocyanin biosynthetic genes (ABGs) have expanded and most genes exist in more than one copy. The anthocyanin biosynthetic structural genes have expanded through whole genome and tandem duplication in B. rapa. More structural genes located upstream of the anthocyanin biosynthetic pathway have been retained than downstream. More negative regulatory genes are retained in the anthocyanin biosynthesis regulatory system of B. rapa.ConclusionsThese results will promote an understanding of the genetic mechanism of anthocyanin biosynthesis, as well as help the improvement of the nutritional quality of B. rapa through the breeding of high anthocyanin content varieties.Electronic supplementary materialThe online version of this article (doi: 10.1186/1471-2164-15-426) contains supplementary material, which is available to authorized users. |
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Keywords: | Comparative genomics Anthocyanin biosynthetic genes Whole genome duplication Brassica rapa Cruciferae |
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