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Cytological investigation of Brazilian nightshade (Solanum seaforthianum Andr.)

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Jagatheeswari D.

International Letters of Natural Sciences

2014

tom 10

Solanum genus namely Solanum seaforthianum Andr. belongs to the Solanaceae family, and comprises only dioeciously species. These plants are distributed between 29º and 40º south. All species of this genus are diploid with chromosome numbers of 2n = 24, 28 and 30. According to literature, the basic chromosome number in this genus is x = 12, 14 and 15. Solanum genus with a chromosome complement of 2n = 30 has a symmetric karyotype with a median and sub median centromere position. Because ancestral species have a symmetric karyotype, it seems that x = 12 is the initial basic chromosome number in this genus and the x = 14 and x = 15 derived from x = 12. So it seems that diploid phenomena played an important role in evolution and speciation.

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1 International Letters of Natural Sciences

1 Jagatheeswari D.

1 2014

Wyniki wyszukiwania

Cytological investigation of Brazilian nightshade (Solanum seaforthianum Andr.)