Table 1.

Number of seeds produced and germinated in relation to the number of crosses carried out, across both crossing strategies, for each generation of the introgression programme for Th. bessarabicum into wheat

		Seeds sown	Germination rate (%)	Survival to flower (%)	Crosses made	Cross fertility (%)	Crossed seeds produced	Seeds/cross	Self-fertilised seeds produced
Crossing strategy 1	Wheat × Th. bessarabicum	–	–	–	184	2.7	5	0.03	0
	F1	5	100	100	317	1.6	5	0.02	0
	BC1	5	80	60	16	100	127	8	144
	BC2	36	81	75	137	93	1748	13	614
	BC3	117	89	80	218	97	3389	16	5791
	BC4	69	8	23	3	100	32	11	793
	Subtotal	232	–	–	875	–	5306	–	7342
Crossing strategy 2	F1	30	93	63	331	24	570	1.7	231
	BC1	63	83	65	365	81	2136	6	266
	BC2	45	73	73	175	91	1965	11	1261
	BC3	356	67	60	29	97	344	12	1287
	Subtotal	494	–	–	900	–	5015	–	3045
	Total	726	–	–	1775	–	10,321	–	10,387