利用 F 1 杏仁甜味分离群体。
而这两个基因参与了 苦杏仁苷的生物合成通路,基于图位克隆的方法,澳门太阳城网址_澳门太阳城官方_澳门太阳城网站 澳门太阳城网址, bHLH1 to bHLH5. Functional characterization demonstrated that bHLH2 controls transcription of the P450 monooxygenase–encoding genes PdCYP79D16 and PdCYP71AN24 ,作者鉴定到了一个46Kb长的基因簇序列区域,杏仁的驯化主要是选择那些能够产生甜仁的基因型,作者在本文中报道了杏仁的参考基因组, 2019 , which are involved in the amygdalin biosynthetic pathway. A nonsynonymous point mutation (Leu to Phe) in the dimerization domain of bHLH2 prevents transcription of the two cytochrome P450 genes。
doi: 10.1126/science.aav8197 Journal: Science Published date:June14。
通讯: R. Sánchez-Pérez (https://plen.ku.dk/english/employees/?pure=en/persons/326340) 研究方向 :李属植物的重要农艺性状的研究, Denmark C orresponding author: R. Sánchez-Pérez Wild almond species accumulate the bitter and toxic cyanogenic diglucoside amygdalin. Almond domestication was enabled by the selection of genotypes harboring sweet kernels. We report the completion of the almond reference genome. Map-based cloning using an F 1 population segregating for kernel taste led to the identification of a 46-kilobase gene cluster encoding five basic helix-loop-helix transcription factors, Mutation of a bHLH transcription factor allowed almond domestication First author: R. Sánchez-Pérez ; Affiliations: University of Copenhagen(哥本哈根大学):Frederiksberg, bHLH2 蛋白上二聚化结构域中一个非同义替换(亮氨酸替换为苯丙氨酸)会导致这两个细胞色素 P450基因的转录降低,从而得到甜味的杏仁,该区域存在五个编码 bHLH转录因子的基因, resulting in the sweet kernel trait. 野生的杏仁会积累苦且具有毒性的生氰二葡糖苷苦杏仁苷,澳门太阳城网址_澳门太阳城官方_澳门太阳城网站 澳门太阳城网址,功能鉴定显示bHLH2能够控制P450单加氧酶编码基因 PdCYP79D16 和 PdCYP71AN24 的转录,澳门太阳城网址_澳门太阳城官方_澳门太阳城网站 澳门太阳城网址,。