Characterization and genetic mapping of a new blood-flesh trait controlled by the single dominant locus DBF in peach

文献类型： 外文期刊

第一作者： Shen, Zhijun

作者： Shen, Zhijun;Yu, Mingliang;Ma, Ruijuan;Confolent, Carole;Lambert, Patrick;Poessel, Jean-Luc;Quilot-Turion, Benedicte;Pascal, Thierry

作者机构：

关键词： Prunus persica;Anthocyanins;Mesocarp;SSR markers;Genetic map;Candidate gene;PprMYB10

期刊名称：TREE GENETICS & GENOMES （ 影响因子：2.297； 五年影响因子：2.547 ）

ISSN： 1614-2942

年卷期： 2013 年 9 卷 6 期

页码：

收录情况： SCI

摘要： Anthocyanin-rich peaches, because of their antioxidant properties and their strong attractiveness to consumers, are increasingly considered in French peach varietal innovation programs that integrate plant genomics and classical breeding. In this study, we describe a new blood-flesh trait identified in the 'Wu Yue Xian' peach accession from China. 'Wu Yue Xian' exhibits a fully red mesocarp during the later stages of fruit development, both with green midrib leaf and normal growth of the tree. This blood-flesh phenotype clearly differs from that determined by a single recessive locus (bf) in 'Harrow Blood', a clone showing blood-flesh in both immature and mature fruit associated with red midrib leaf and reduced tree height. We have then provided genetic evidence that blood-flesh phenotype of 'Wu Yue Xian' was controlled by a single dominant locus, designated DBF (Dominant Blood-Flesh), in four successive families derived from this accession. A genetic linkage map of the blood-flesh parent ('D6090') of the fourth population was constructed, including 102 SSRs spanning a total distance of 562.3 cM in eight linkage groups. Whereas the bf locus is located to linkage group 4, we mapped DBF to the top of linkage group 5, thus proving that DBF and bf loci are not alleles. Among 64 predicted genes in the DBF region (505 kbp), three genes of the dihydroflavonol-4-reductase family were identified as good candidates for the control of the DBF trait. Furthermore, SSR markers flanking DBF, such as AMPP157 and AMPPG178, supply a good basis to implement marker-assisted selection for this trait.

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