title: Varietal differences in the flavonol content of mulberry (Morus spp.) leaves and genetic analysis of quercetin 3-(6-malonylglucoside) for component breeding.
abstract: The varietal differences in the flavonol glycosides rutin, isoquercitrin, kaempferol 3-(6-rhamnosylglucoside), quercetin 3-(6-malonylglucoside), astragalin, quercetin 3-(6-acetylglucoside), and kaempferol 3-(6-malonylglucoside) contained in mulberry leaves were elucidated. This information was used for breeding mulberry cultivars with a high concentration of functional components. The flavonol content, composition, and proportion in leaves varied widely. 'Kobuchizawa 1' had the highest level of total flavonols (1819 mg/100 g of dry weight), 5 times higher than that of 'Mikurasima 15' (393 mg/100 g of dry weight). Quercetin 3-(6-malonylglucoside) was the most abundant flavonol, although it was not found in all cultivars. Quercetin 3-(6-acetylglucoside) was only found in 'Keguwa'. From the quercetin 3-(6-malonylglucoside) content in crossbred offspring, malonyltransferase, an enzyme involved in quercetin 3-(6-malonylglucoside) synthesis, was acquired according to Mendelian inheritance. An offspring with a higher quercetin 3-(6-malonylglucoside) level than both parents was obtained from the crossing. This suggested that crossbreeding was effective for acquiring cultivars with a higher content of quercetin 3-(6-malonylglucoside).
authors: Shimane Agricultural Technology Center , 2440 Ashiwata-cho, Izumo, Shimane 693-0035, Japan.
authors: Mari
authors: M
authors: Sugiyama
authors: Takuya
authors: T
authors: Katsube
authors: Akio
authors: A
authors: Koyama
authors: Hiroyuki
authors: H
authors: Itamura
mesh_terms: D001947:Breeding; D044948:Flavonols / Q000032:analysis*; D031625:Morus / Q000737:chemistry* / Q000145:classification / Q000235:genetics; D010936:Plant Extracts / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry; D011794:Quercetin / Q000031:analogs & derivatives* / Q000032:analysis
chemical_list: D044948:Flavonols; D010936:Plant Extracts; C500753:quercetin 3-(6-malonylglucoside); D011794:Quercetin