Íslenskar landbúnaðarrannsóknir - 01.03.1970, Side 82

80 ÍSLENZKAR LANDBUNAÐARRANNSÓKNIR
TABLE 39. Continued
C. All matings except those in part B above
Lamb group
Mating Type of birth wm nm wf nf Total DF X2
AiAi x AiAj S 8 11 19 1 0.474
T 16 10 26 1 1.385
S + T 24 21 45 1 0.200
AiAi x AkAj S 21 17 38 1 0.421
T 36 32 68 1 0.235
S + T 57 49 106 1 0.604
AiAj x AiAj S 18 2 25 8 53 3 5.013
T 34 12 26 14 86 3 2.434
S + T 52 14 51 22 139 3 1.911
AiAj x AkAj S 22 26 39 24 111 3 6.369
T 60 60 51 65 236 3 1.729
S + T 82 86 90 89 347 3 0.447
AjAj x AiAj S 30 25 30 18 103 3 3.757
T 43 42 49 54 188 3 2.000
S + T 73 67 79 72 291 3 1.021
AjAj x AkAj S 140 187 327 1 6.755**
T 279 295 574 1 0.446
S + T 419 482 901 1 4.405*
Total number of progeny
1829
S = singles; T = twins; wm = white, nm
white female.
*) P < 0.05; **) P<0.01
data among those tried had the following
parameters.
u = advantage of sperm carrying allele
over sperm carrying allele Agi This
advantage was only expected in sperrn
from Ax A5-rams.
v = advantage of sperm carrying the X-
chromosome and allele Ag in matings
involving wliite ewes.
= nonwhite male; wf = white, nf = non-
s = excess mortality of white embryos in
white females.
The selective fertilization was thus only
assumed to be connected with sperm activ-
ity, while the presence or absence of the
Ax or Ag allele from the dam in the fer-
tilized ovum was assumed to be a random
process. The probabilities for union of
gametes in the matings in table 39 B are