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Position: Home > Articles > Dissecting the genetic architecture of glucosinolate compounds for quality improvement in flowering stalk tissues of Brassica napus Horticultural Plant Journal 2023,9 (3)

Dissecting the genetic architecture of glucosinolate compounds for quality improvement in flowering stalk tissues of Brassica napus

作  者：
Changbin Gao;Fugui Zhang;Yang Hu;Liping Song;L. Tang;Xueli Zhang;Cong’an He;Aihua Wang;Xiaoming W
单  位：
Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crop Research Institute Chinese Academy of Agricultural Sciences, Wuhan 430062, Chin;Wuhan Vegetable Research Institute, Wuhan Academy of Agriculture Science, Wuhan 430345, China;Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crop Research Institute Chinese Academy of Agricultural Sciences, Wuhan 430062, China;Jingzhou Academy of Agricultural Science, Jingzhou 434007, China; School of Agronomy, Anhui Agricultural University, Hefei 230036, China
关键词：
Rapeseed;Brassica napus L.;Glucosinolate compounds;Genome-wide association study (GWAS);Flowering stal
摘  要：
Glucosinolates (GSLs) and their hydrolytic products contribute to the quality traits of rapeseed flowering stalk tissues, such as taste, flavor and anticarcinogenic properties (Glucoraphanin). However, little is known about the genetic mechanisms of GSL accumulation in rapeseed flowering stalks. In this study, the variation and genetic architecture of GSL metabolites in flowering stalk tissues were investigated for the first time among a panel of 107 accessions. All GSL compounds exhibited continuous and wide variations in the present population. Progoitrin, glucobrassicanapin and gluconapin were the most abundant GSL compounds. Five quantitative trait loci (QTL) significantly associated with three GSL compounds were identified by genome-wide association study. GRA_C04 was under selected during modern breeding, in which the ratio of lower GSL haplotype (HAP2) in the accessions bred before 1990 (52.56%) was significantly lower than that after 1990 (78.95%). Four candidate genes, BnaA01.SOT16, BnaA06.SOT17, BnaA06.MYB51a, and BnaA06.MYB51b, were identified in the GTL_A01 and 4OH_A06 regions. These findings provide new insights into GSL biosynthesis in flowering stalk tissues and facilitate quality improvement in rapeseed flowering stalks.

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