Three new sources of cytoplasmic male sterility in tobacco with interspecific origin are reported. The wild species Nicotiana
excelcior Black (n = 19), N. amplexicaulis Burbidge (n = 18) and N. rustica L. (n = 24) are used as donor of cytoplasm. Nuclear
donor is N. tabacum L. (n = 24). The genetic effects of cytoplasmic-nuclear interactions of the studied species are discussed.
Our experiments prove that N. excelcior, N. amplexicaulis and N. rustica are carriers of cytoplasmic genes for male sterility
that express in combination with nuclear genes of N. tabacum.
cytoplasmic male sterility - interspecific hybridization - Nicotiana tabacum - Nicotiana excelcior - Nicotiana amplexicaulis - Nicotiana rustica - tobacco
This revised version was published online in July 2006 with corrections to the Cover Date.