Estimation of genetic and phenotypic parameters in a closed ...

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where:
"ott(*y)
2
ã:
"r(x)
= total covaríance component between traits x and y
total variance component for trait x
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i'e' oY(*) + oc(*) * ot(*) *
2
on
(*)
2
a-. . = total variance cornponent for trait y
r(y)
r'e' .2222
oY(y) * oc(y) * os(y) + on(y)
The standard error of the phenotypic correlation coeffícient
(S.E.r ) v¡as estim¡ted as follows:
p
S"E.r
where: n. is the total number of lítters
b. GeneLic correlation betr¡een traits x and y (Tg(*y)) was
estimated as follows:
tc(*y)
= tots(*y)
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os
(*) os (y)
where:
.ors(*y) = sire componerit of covariance between traits
xandy
)
oõ(*) = sire component of
variance for the traít x
2
oõ(r) = sire component of
variance for the traít y