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Two genera, Brassica and sinapis, belong to the family Cruciferae (Brassicaceae). It had been suggested that they had have 1 ancestor and 2 different lineages. Detailed cytogenetical study had been carried out on 6 species belonging to them. These are: B. nigra, B. rapa ( campestris) and B. tournefortii from genus Brassica and S. alba, S. allionii and S. turgida from genus Sinapis. Data obtained by the present study support this suggestion. Karyomorphological analysis for 4 species reveals that B. nigra is the most primitive and it was similar to S. turgida and S. allionii. Also meiotic analysis and electrophoretic seed protein profiles confirm the karyomorphological results. Moreover, seed protein electrophoresis indicates that these 2 genera had a characteristic protein composition which is of taxonomic importance. So, the present resulted information could be considered a reliable data which aid in reevaluation the evolutionary relationships of the 2 genera. Moreover, these present data prove that they are highly paraphylogeny.

Cytogenetic and Molecular Reevaluation the Relationships of Species Belonging to the Two Genera Brassica and Sinapis