TABLE 1.

Number of loci and individuals tested, by extraction, for three mapping families

	Extraction
Family	1	2	3	4	Total
1. (7 × 9) × (2 × 5)
No. of loci	22	38	36	48	68
Mean no. of larvae per locus	74.5	73.0	86.1	83.7	169.1
N minimum	55	49	49	67	55
N maximum	83	89	94	94	346
2. (2 × 5) × (7 × 9)
No. of loci	23	49	25	—	67
Mean no. of larvae per locus	82.7	83.9	84.9	—	118.5
N minimum	62	43	62	—	52
N maximum	94	93	94	—	240
3. (7 × 6) × (5 × 2)
No. of loci	36	48	66	20	78
Mean no. of larvae per locus	86.9	79.1	82.4	87.4	177.0
N minimum	37	48	52	76	67
N maximum	94	89	93	91	348