Abstract
The genetic control of glucosinolate composition in Brassica juncea Coss. was studied in crosses between two 2-propenyl type mustards (cv. Domo and line ZEM 84-2293) and the Indian 3-butenyl type mustard line, 60143. Field-grown single plants from parents F1, backcross and F2 generations were analyzed for glucosinolate composition. Selfed and crossed seed borne on the same parent was identical in glucosinolate composition indicating maternal control of this characteristic. F2 seed from F1 plants of both reciprocal crosses contained both 2-propenyl and 3-butenyl glucosinolates, indicating that glucosinolate composition was controlled by nuclear genes. F1 plants carrying line 60143 cytoplasm had significantly higher 2-propenyl and 3-butenyl glucosinolate contents than F1 plants with either Domo or ZEM 84-2293 cytoplasm. Individual plants in the back-cross generations contained either one or the other or both the parent glucosinolates. F2 plants contained either one of the two parent glucosinolates or both glucosinolates in varying concentrations. The results indicated that 2-propenyl and 3-butenyl glucosinolate syntheses were controlled by multiple additive alleles at the same loci.Key words: Mustard, Brassica juncea, glucosinolates, genetic control
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