ISHS Acta Horticulturae 459: International Symposium Brassica 97, Xth Crucifer Genetics Workshop
GENETICS AND BREEDING IN BRASSICA OILSEED CROPS |
| Author: | S.S. Banga |
| Keywords: | Rapeseed-mustard, crop improvement, quality, biotechnology, hybrids, male sterility |
| Abstract:
Current status of Brassica oilseeds as the third most important source of edible vegetable oils owes much to the success of plant breeders and associate scientists in genetically blocking synthesis of erucic acid and glucosinolates. In the self-pollinating types (B. napus, B. juncea) cultivar development so far had been mainly from mobilization of additive genetic variability using various forms of pedigree method. In allogamous B. campestris, yield improvement was achieved through mass selection. Recurrent selection is yet to receive desired attention. Further productivity gains are expected from current emphasis on developing CMS based hybrids. Selection, mutagenesis and transformation techniques have helped in engineering high oleic, stearic, lauric and low linolenic acid varieties. Susceptibility to several pests and diseases remains the major area of concern. Better management of these stresses is expected from engineered resistance, as has been experimentally demonstrated in case of chitinase and snowdrop lectin genes. Since most of agronomic traits show quantitative inheritance, their detection, mapping and characterization will have crucial bearing on breeders ability to manipulate desirable genes for realizing future productivity targets. | |
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