Summary
Six Brassica napus — B. nigra disomic addition lines were characterized by isozyme, fatty acid, and RFLP markers. The markers were arranged in six synteny groups, representing six of the eight chromosomes present in the B. nigra genome. Synteny group 1 displayed high levels of linoleic and linolenic acids in the seeds of the B. nigra parent. Synteny group 3 accumulated higher levels of eicosenoic and erucic acid than B. nigra. Three of the lines transmitted the alien chromosome to 100% of the progeny. The rest had variable transmission rates but all were above 50%. Most of the lines produced disomic addition plants in their progeny, suggesting pollen transmission of the alien chromosome. In addition to the marked lines, six others remained unmarked. These could be grouped into two classes according to their alien chromosome transmission. It is likely that they represent the two other B. nigra chromosomes that remained uncharacterized by the markers. No diploid individuals carrying B. nigra genome-specific markers were detected in the progenies studied.
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Communicated by H. F. Linskens
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Chevre, A.M., This, P., Eber, F. et al. Characterization of disomic addition lines Brassica napus-Brassica nigra by isozyme, fatty acid, and RFLP markers. Theoret. Appl. Genetics 81, 43–49 (1991). https://doi.org/10.1007/BF00226110
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DOI: https://doi.org/10.1007/BF00226110