Table 1.

Heritability (on diagonal), phenotypic (above diagonal) and genetic (below diagonal) correlations for FSS traits. Standard errors of estimates are in parentheses

Traitsa	FE1	FDD1	FE2	FDD2
FE1	0.121 (0.036)	0.824	0.203	0.170
FDD1	0.963 (0.040)	0.112 (0.036)	0.139	0.128
FE2	0.654 (0.158)	0.374 (0.190)	0.248 (0.055)	0.809
FDD2	0.577 (0.171)	0.348 (0.191)	0.978 (0.020)	0.218 (0.053)

^a: FE1 and FDD1 represent individual fertility and fertility duration days during the first experimental period from 245 to 256 days of age (12 days), repectively. FE2 and FDD2 represent individual fertility fertility duration days during the second experimental period from 378 to 392 days of age (15 days), respectively