Development of genic cleavage markers in association with seed glucosinolate content in canola

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Ying FuWei Qian

Abstract

The orthologues of Arabidopsis involved in seed glucosinolates metabolism within QTL confidence intervals were identified, and functional markers were developed to facilitate breeding for ultra-low glucosinolates in canola. Further reducing the content of seed glucosinolates will have a positive impact on the seed quality of canola (Brassica napus). In this study 43 quantitative trait loci (QTL) for seed glucosinolate (GSL) content in a low-GSL genetic background were mapped over seven environments in Germany and China in a doubled haploid population from a cross between two low-GSL oilseed rape parents with transgressive segregation. By anchoring these QTL to the reference genomes of B. rapa and B. oleracea, we identified 23 orthologues of Arabidopsis involved in GSL metabolism within the QTL confidence intervals. Sequence polymorphisms between the corresponding coding regions of the parental lines were used to develop cleaved amplified polymorphic site markers for two QTL-linked genes, ISOPROPYLMALATE DEHYDROGENASE1 and ADENOSINE 5'-PHOSPHOSULFATE REDUCTASE 3. The genic cleavage markers were mapped in the DH population into the corresponding intervals of QTL explaining 3.36-6.88 and 4.55-8.67 % of the phenotypic variation for...Continue Reading

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