The present invention provides a colored sweet potato that has a high anthocyanin content, and that is useful as a pigment material. Further, the present invention also provides a processed product of the colored sweet potato useful as a purple pigment, more specifically, an extract composition, as well as the purified matter thereof (including roughly purified matter).
A colored sweet potato having the following characteristics is used.
(A) the color value (530 nm) per gram of wet weight of colored sweet potato (color value (530nm)/g) is not less than 15;
(B) the absorbance ratio (320 nm/530 nm) per gram of wet weight of colored sweet potato (absorbance ratio (320 nm/530 nm)/g) is not less than 1.5;
(C) color value (530nm)/g × absorbance ratio (320nm/530nm)/g = not less than 30; and
(D) LTR retrotransposon (Rtsp-1) is inserted into at least two positions of the genome sequence, and an amplified product having a fragment length of 500 to 530bp is produced when a nucleic acid amplification reaction is performed using, as a test material, a part of a plant, and at least one of primer set 1 containing a forward primer having the base sequence of SEQ ID NO:1 and a reverse primer having the base sequence of SEQ ID NO:2, and primer set 2 containing a forward primer having the base sequence of SEQ ID NO:1 and a reverse primer having the base sequence of SEQ ID NO:3.
本发明提供了一种
花青素含量高、可用作
颜料材料的彩色甘薯。此外,本发明还提供了一种可用作紫色
颜料的彩色甘薯加工产品,更具体地说,是一种
提取物组合物及其提纯物(包括粗提纯物)。
使用具有以下特征的彩色甘薯。
(A) 每克有色甘薯湿重的色值(530 纳米)(色值(530 纳米)/克)不低于 15;
(B) 每克有色红薯湿重的吸光率(320 纳米/530 纳米)(吸光率(320 纳米/530 纳米)/克)不小于 1.5;
(C) 色值(530 纳米)/克×吸光度比(320 纳米/530 纳米)/克=不 少于 30;以及
(D) LTR 反转座子(Rtsp-1)被插入
基因组序列的至少两个位置,当使用植物的一部分作为测试材料进行核酸扩增反应时,产生片段长度为 500 至 530bp 的扩增产物,引物组 1 中至少有一个包含具有
SEQ ID NO:1 的正向引物和具有
SEQ ID NO:2 碱基序列的反向引物,以及含有具有
SEQ ID NO:1 碱基序列的正向引物和具有
SEQ ID NO:3 碱基序列的反向引物的引物组 2 中的至少一种。