Abstract
Genetic relationships were evaluated among nine cultivars ofBrassica campestris by employing random amplification of polymorphic DNA (RAPD) and amplified fragment length polymorphism (AFLP) markers. RAPDs generated a total of 125 bands using 13 decamer primers (an average of 9.6 bands per assay) of which nearly 80% were polymorphic. The per cent polymorphism ranged from 60–100%. AFLP, on the other hand generated a total of 319 markers, an average of 64 bands per assay. Of these, 213 were polymorphic in nature (66.8%). AFLP methodology detected polymorphism more efficiently than RAPD approach due to a greater number of loci assayed per reaction. Cultivar-specific bands were identified, for some cultivars using RAPD, and for most cultivars with AFLP. Genetic similarity matrix, based on Jaccard’s index detected coefficients ranging from 0.42 to 0.73 for RAPD, and from 0.48 to 0.925 for AFLPs indicating a wide genetic base. Cluster analyses using data generated by both RAPD and AFLP markers, clearly separated the yellow seeded, self-compatible cultivars from the brown seeded, self-incompatible cultivars although AFLP markers were able to group the cultivars more accurately. The higher genetic variation detected by AFLP in comparison to RAPD was also reflected in the topography of the phenetic dendrograms obtained. These results have been discussed in light of other studies and the relative efficiency of the marker systems for germplasm evaluation.
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Abbreviations
- RFLP:
-
restriction fragment length polymorphism
- SSR:
-
simple sequence repeats
- RAPD:
-
random amplification of polymorphic DNA
- AFLP:
-
amplified fragment length polymorphism
- PCR:
-
polymerase chain reaction
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Das, S., Rajagopal, J., Bhatia, S. et al. Assessment of genetic variation withinBrassica campestris cultivars using amplified fragment length polymorphism and random amplification of polymorphic DNA markers. J. Biosci. 24, 433–440 (1999). https://doi.org/10.1007/BF02942653
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DOI: https://doi.org/10.1007/BF02942653