Interrelationships among diploid species of the Solanum nigrum L. complex

Rao, G.R.; Kumar, A.

Journal of the Indian Botanical Society 62(1): 25-31

1983


ISSN/ISBN: 0019-4468
Accession: 001215005

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Abstract
Seven diploid taxa of the complex were studied for crossability and pairing behaviour of the chromosomes. Reciprocal crosses between S. douglasii and S. americanum, diploid S. nigrum, S. nodiflorum, S. nodiflorum subsp. nutans and S. sarrachoides were not successful. It is concluded that S. douglasii is distantly related to the other species. Reciprocal crosses between S. nodiflorum subsp. nodiflorum and S. douglasii produced several fertile hybrids of identical morphology with normal meiosis, whereas reciprocal crosses between S. nodiflorum subsp. nutans and S. douglasii failed. On the basis of chromosome pairing in hybrids between S. nodiflorum subsp. nodiflorum and S. douglasii, it is thought that the species have a close genetic relationship.