Methods
The score statistic
Let yk and yl be the phenotypic values of individuals k and
l, respectively, in a pedigree. It is assumed that there is no
locus-specific dominance effect. Then conditional on the
number of alleles shared identical by descent (IBD) by k
and l at a putative locus t, we have [4]
where Φkl is the kinship coefficient between individual k
and individual l, is the additive variance due to locus
t, and 1{τ=k} is the indicator function which equals 1 when
τ = k and equals 0 otherwise. The first term, Cov(yk,yl), is
completely determined by the segregation parameters,
such as means, the total additive variance, the total dominance
variance, the variance of environmental effect, etc.
These parameters can be estimated beforehand using phenotypic
data only. The remaining term depends only on
the pedigree structure through Φkl and the linkage parameter
(i.e., ). The hypotheses of interest are
วิธีสถิติคะแนนให้YK ลิตรตามลำดับในสายเลือด มันจะสันนิษฐานว่าไม่มีผลกระทบต่อการปกครองสถานที่เฉพาะ Methods
The score statistic
Let yk and yl be the phenotypic values of individuals k and
l, respectively, in a pedigree. It is assumed that there is no
locus-specific dominance effect. Then conditional on the
number of alleles shared identical by descent (IBD) by k
and l at a putative locus t, we have [4]
where Φkl is the kinship coefficient between individual k
and individual l, is the additive variance due to locus
t, and 1{τ=k} is the indicator function which equals 1 when
τ = k and equals 0 otherwise. The first term, Cov(yk,yl), is
completely determined by the segregation parameters,
such as means, the total additive variance, the total dominance
variance, the variance of environmental effect, etc.
These parameters can be estimated beforehand using phenotypic
data only. The remaining term depends only on
the pedigree structure through Φkl and the linkage parameter
(i.e., ). The hypotheses of interest are
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