Table 1.

Conventional crossing between N. tabacum and eight species of section Suaveolentes

Cross combination	No. of flowers pollinated	No. of capsules obtained	No. of seeds sown	No. of hybrids obtained
N. africana × ‘Red Russian’	8	4	161	134
‘Red Russian’ × N. africana	20	10	200	141
N. africana × ‘Samsun NN’	3	3	120	69
‘Samsun NN’ × N. africana	9	7	118	103
N. excelsior × ‘Red Russian’	10	6	140	123
‘Red Russian’ × N. excelsior	14	3	120	2
N. excelsior × ‘Samsun NN’	5	4	120	108
‘Samsun NN’ × N. excelsior	4	4	119	0
N. fragrans × ‘Red Russian’	2	2	119	0
‘Red Russian’ × N. fragrans	9	0	–	–
N. fragrans × ‘Samsun NN’	1	1	120	0
‘Samsun NN’ × N. fragrans	7	5	120	100
N. goodspeedii × ‘Red Russian’	20	19	198	168
‘Red Russian’ × N. goodspeedii	20	0	–	–
N. goodspeedii × ‘Samsun NN’	20	19	116	113
‘Samsun NN’ × N. goodspeedii	20	0	–	–
N. gossei × ‘Red Russian’	20	20	199	196
‘Red Russian’ × N. gossei	27	2	198	6
N. gossei × ‘Samsun NN’	21	15	115	93
‘Samsun NN’ × N. gossei	20	1	120	26
N. maritima × ‘Red Russian’	8	6	150	142
‘Red Russian’ × N. maritima	20	0	–	–
N. maritima × ‘Samsun NN’	6	6	120	117
‘Samsun NN’ × N. maritima	20	0	–	–
N. megalosiphon × ‘Red Russian’	20	20	195	176
‘Red Russian’ × N. megalosiphon	20	3	313	0
N. megalosiphon × ‘Samsun NN’	20	17	119	84
‘Samsun NN’ × N. megalosiphon	9	6	117	2
N. velutina × ‘Red Russian’	20	17	159	123
‘Red Russian’ × N. velutina	20	0	–	–
N. velutina × ‘Samsun NN’	11	10	120	109
‘Samsun NN’ × N. velutina	20	0	–	–