Genetics of aliphatic glucosinolates. IV. Side-chain modification in Brassica oleracea

The biochemical and genetical relationship between aliphatic glucosinolates which have methylthioalkyl, methylsulphinylalkyl and alkenyl side chains has not been resolved by biochemical studies. In this study, two hypothetical models are tested by the genetic analysis of a backcross population betwe...

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Bibliographic Details
Published inTheoretical and applied genetics Vol. 93; no. 5/6; pp. 1006 - 1010
Main Authors Giamoustaris, A, Mithen, R
Format Journal Article
LanguageEnglish
Published Germany 01.10.1996
Subjects
2-propenyl glucosinolate
3-methylsulfinylpropyl glucosinolate
3-methylthiopropyl glucosinolate
backcrossing
biosynthesis
Brassica
Brassica drepanensis
Brassica insularis
chromosome mapping
glucosinolates
gsl-alk-c locus
gsl-oxid locus
interspecific hybridization
loci
restriction fragment length polymorphism
wild plants
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Summary:The biochemical and genetical relationship between aliphatic glucosinolates which have methylthioalkyl, methylsulphinylalkyl and alkenyl side chains has not been resolved by biochemical studies. In this study, two hypothetical models are tested by the genetic analysis of a backcross population between Brassica drepanensis and B. atlantica. The results support one of the models in which 3-methylthiopropyl glucosinolate is sequentially converted to 3-methylsulphinylpropyl, and then to 2-propenyl glucosinolate, by the action of dominant alleles at two loci. RFLP mapping positioned both loci on the same linkage group homologous to the B. napus N19 linkage group. The implication of the results for the genetic manipulation of glucosinolates in Brassica to improve flavour and nutritional properties, and in order to investigate plant-insect interactions, is discussed.
ISSN:0040-5752
1432-2242
DOI:10.1007/bf00224105