Table 4. The cross-breeding for the YH and SY populations of E. obliqua.

Cross	Replications	No. eggs laid/female	Hatchability	Survival to adult	Percentage of normal adults	Sex ratio (♀:♂)
YH♀×SY♂	12	357±15.58 B	0.01±0.00 C	0.17±0.02 B	18.23±12.25 B	1∶4
SY♀×YH♂	12	394±19.35 AB	0.54±0.05 B	0.19±0.01 B	24.70±10.06 B	1∶27
YH♀×YH♂	12	396±8.90 AB	0.74±0.09 A	0.80±0.03 A	93.49±2.05 A	1∶1
SY♀×SY♂	12	442±13.80 A	0.66±0.02 A	0.77±0.02 A	94.16±0.62 A	1∶1

Data in the table are mean ± SE. The letters following the SEs group observations in the same column that are not significantly different (P>0.01, Duncan's multiple range test. Means with no common letters were significantly different. Note that the values of the sex ratio (♀:♂) were not analysed in this manner.