Table 5

Genetic and environmental correlations between litter size and birth size traits (standard error)

Birth mass

χ2

Birth head width

χ2


Genetic correlations


LS direct - BS direct

0.54 (0.23)*

5.00

0.47 (0.26)*

3.34


LS direct - BS maternal

-0.30 (0.23)

1.20

-0.47 (0.38)

0.30


BS direct - BS maternal

0.04 (0.32)

0.00

0.34 (0.76)

1.26


Environmental correlations


Permanent environmental

-0.35 (0.17)*

3.00

-0.44 (0.17)*

4.32


LS residual - BS litter

-0.67 (0.02)***

635.40

-0.52 (0.02)***

345.22


LS litter size; BS birth size (mass or head width)

Statistical significance: * P < 0.1; **P < 0.01;***P < 0.001

χ2 Chi square test statistic for loglikelihood-ratio test of the covariance

Schroderus et al. BMC Evolutionary Biology 2012 12:44   doi:10.1186/1471-2148-12-44

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