Íslenskar landbúnaðarrannsóknir - 01.03.1970, Page 60

58 ÍSLENZKAR LANDBTJNAÐARRANNSÓKNIR
TABLE 17
Phenotypic probabilities within situations and classes
Situation No. of classes Class No. Observed frequencies, ni Phenotypic probabilities1)
1 2 1 ni ajbk + ajb, + ajbk
2 n2 aibi
2 2 1 ni ai (bk + bl)
2 n2 aj (bk + bl)
3 2 1 nl bk (ai + aj)
2 n2 bl (ai + aj)
4 3 1 nl ai (bk + bl)
2 n2 aibk
3 n3 aJbl
5 3 1 nl bk (ai + aj)
2 n2 ajbl
3 n3 ajbl
6 3 1 nl aibk
2 112 aibl + ajbk
3 n3 ajbl
7 4 1 nl aibk
2 n2 aib[
3 n3 ajbk
4 n4 ajbl
1) all probabilities to be divided by (a^ -)- a^) (bk -(- bj)
alleles of both parents within a mating,
the situation to which the mating belong-
ed and the observed frequencies in the
phenotypic classes within the mating. The
program then calculated the contribution
from tliis mating to the score vector and
information matrix. The next mating was
treated in the same way and the result
added to the values already held in the
positions of the score vector and informa-
tion matrix, the indices of the alleles deter-
mining the vector and matrix elements to
which the new information was to be
added.
When the information from all the mat-
ings with expected segregation in table 9
had been obtained in this fornr the itera-
tive solution to the simultaneous equations
could be found.
All 8 parameters were first estimated
using all available data from table 9 and
excluding all progeny with unexpectecl