Íslenskar landbúnaðarrannsóknir - 01.03.1970, Side 31

COLOUR INHERITANCE IN ICELANDIC SHEEP 29
TABLE 4
Progeny of ram No. 01091, a grey badgerface, used in 1960/61
Colour of progeny
Colour and genotype of ewes White Grey Black badgerface Grey badgerface Total
White (Ar—) .... 5 1 6
White (A1A2) .... 2 2 4
White (A1A5) .... 2 1 3
Grey badgerface (A2A3) .... 2 1 3
Black (A5A5) .... 3 3 6
TABLE 5
Progeny of ram No. 01097, a greybrown rnouflon, used in 1960/61
Golour of progeny
Colour and genotype of ewes White Grey Black mouflon Grey- brown Brown mouflon Total
White (Ai ) 11 11
Black (AbA5BiB2) 1 2 3
Brown (A5AbB2B2) 7 3 10
This ram was mated to all available
brown ewes at Elestur to test the segrega-
tion of the alleles A2 and A4 on back-
ground of brown pigment, and afso to
black ewes known to be heterozygous
brown. He was also mated to several well
tested white ewes which had high prob-
ability of being homozygous white. From
the latter matings it was intended to ob-
tain white ram lambs for further experi-
ments.
The results of the matings of those two
rams are given in tables 4 and 5.
Frorn table 4 it can be seen that the
segregation of the genes for grey and
badgerface supports the previous findings
that tliey were allelic, and from table 5 it
is seen that tlie genes for grey and mou-
ffon segregated in the same way on a back-
ground of brown pigment as the genes for
grey and badgeríace and badgerface and
mouflon did on a black background.
In autumn 196f, 4 white ram lambs
sired by ram No. 01091 ancl 4 wliite ram
lambs by ram No. 01097 were kept for
breeding.
Due to shortage of black and brown
ewes at the Experimentaf Farm, only 2