학술논문
Novel glucosinolate composition lacking 4-methylthio-3-butenyl glucosinolate in Japanese white radish (Raphanus sativus L.)
Original Article
Original Article
Document Type
Report
Author
Source
Theoretical and Applied Genetics. October 2015, Vol. 128 Issue 10, p2037, 10 p.
Subject
Language
English
ISSN
0040-5752
Abstract
Author(s): Masahiko Ishida[sup.1] , Tomohiro Kakizaki[sup.2] , Yasujiro Morimitsu[sup.3] , Takayoshi Ohara[sup.2] , Katsunori Hatakeyama[sup.2] , Hitoshi Yoshiaki[sup.2] , Junna Kohori[sup.2] , Takeshi Nishio[sup.4] Author Affiliations: (1) NARO Institute of [...]
Key message Genetic analysis and gene mapping of the 4-methylthio-3-butenyl glucosinolate-less trait of white radish were performed and a white radish cultivar with new glucosinolate composition was developed. A spontaneous mutant having significantly low 4-methylthio-3-butenyl glucosinolate (4MTB-GSL) content was identified from a landrace of Japanese white radish (Raphanus sativus L.) through intensive evaluation of glucosinolate profiles of 632 lines including genetic resources and commercial cultivars using high-performance liquid chromatography (HPLC) analysis. A line lacking 4MTB-GSL was developed using the selected mutant as a gene source. Genetic analyses of F.sub.1, F.sub.2, and BC.sub.1F.sub.1 populations of this line suggested that the 4MTB-GSL-less trait is controlled by a single recessive allele. Using SNP and SCAR markers, 96 F.sub.2 plants were genotyped, and a linkage map having nine linkage groups with a total map distance of 808.3 cM was constructed. A gene responsible for the 4MTB-GSL-less trait was mapped between CL1753 and CL5895 at the end of linkage group 1. The genetic distance between these markers was 4.2 cM. By selfing and selection of plants lacking 4MTB-GSL, a new cultivar, 'Daikon parental line No. 5', was successfully developed. This cultivar was characterized by glucoerucin, which accounted for more than 90 % of the total glucosinolates (GSLs). The total GSL content in roots was ca. 12 [mu]mol/g DW, significantly lower than those in common white radish cultivars. Significance of this line in radish breeding is discussed. Electronic supplementary material The online version of this article (doi:10.1007/s00122-015-2564-3) contains supplementary material, which is available to authorized users.
Key message Genetic analysis and gene mapping of the 4-methylthio-3-butenyl glucosinolate-less trait of white radish were performed and a white radish cultivar with new glucosinolate composition was developed. A spontaneous mutant having significantly low 4-methylthio-3-butenyl glucosinolate (4MTB-GSL) content was identified from a landrace of Japanese white radish (Raphanus sativus L.) through intensive evaluation of glucosinolate profiles of 632 lines including genetic resources and commercial cultivars using high-performance liquid chromatography (HPLC) analysis. A line lacking 4MTB-GSL was developed using the selected mutant as a gene source. Genetic analyses of F.sub.1, F.sub.2, and BC.sub.1F.sub.1 populations of this line suggested that the 4MTB-GSL-less trait is controlled by a single recessive allele. Using SNP and SCAR markers, 96 F.sub.2 plants were genotyped, and a linkage map having nine linkage groups with a total map distance of 808.3 cM was constructed. A gene responsible for the 4MTB-GSL-less trait was mapped between CL1753 and CL5895 at the end of linkage group 1. The genetic distance between these markers was 4.2 cM. By selfing and selection of plants lacking 4MTB-GSL, a new cultivar, 'Daikon parental line No. 5', was successfully developed. This cultivar was characterized by glucoerucin, which accounted for more than 90 % of the total glucosinolates (GSLs). The total GSL content in roots was ca. 12 [mu]mol/g DW, significantly lower than those in common white radish cultivars. Significance of this line in radish breeding is discussed. Electronic supplementary material The online version of this article (doi:10.1007/s00122-015-2564-3) contains supplementary material, which is available to authorized users.