Íslenskar landbúnaðarrannsóknir - 01.03.1970, Blaðsíða 33

COLOUR INHERITANCE IN ICELANDIC SHEEP 31
TABLE 6
Four wliite sons of ram No. 01091 and white ewes, mated to black (A3Ag) ewes,
used in 1961/62
Ram No. No. of progeny Genotype of ram
White Grey Black badgerface Other colours Total
01114 7 0 7 0 14 AiA3
01115 6 6 0 0 12 A1A2
22001 5 0 12 0 17 A1A3
25001 7 (3*) 10 0 17(20) A1A3
*) The occurrence of the 3 grey lambs is almost certainly due to the introduction of a
homozygous grey ram into the mating pen of ram No. 25001 at the beginning of the
mating season.
TABLE 7
Four white sons of ram No. 01097 and white ewes mated to brown (AgAgB2B2)
ewes, used in 1961 / 62
Ram No. No. of progeny Genotype of ram
White Grey Grey- brown Black mouflon Brown mouflon Other colours Total
01117 4 0 0 0 8 0 12 A1A4B2B2
01118 10 0 11 0 0 0 21 AlA^B^B^
01119 12 4 4 0 0 0 20 AiA2BiB2
01120 5 4 6 0 0 0 15 A1A2B1B2
The result of the experiments with the
8 white rams are shown in tables 6 and 7.
None of the black ewes in table 6 show-
ed white markings, and none of the non-
white lambs in the table showed white
markings either. Only 2 of the black ewes
in table 6 were known to carry recessive
brown. One of them was mated to ram
No. 01114 and one to ram No. 01115; none
of the lambs showed brown pigment.
As table 6 shows, all the nonwhite lambs
sired by the white sons of ram No. 01091
show only the pattern genes that ram No.
01091 carried. Three of the sons have ob-
tained the badgerface gene from their sire
and one the gene for grey.
As all of these sires produce only one
type of pattern among nonwhite progeny
(assuming the 3 grey lambs on farm 25 to
be by another sire), this is an important