Íslenskar landbúnaðarrannsóknir - 01.09.1981, Side 48

46 ÍSLENZKAR LANDBÚNAÐARRANNSÓKNIR
SUMMARY
Samandregið yfirlit
Gerð er grein fyrir niðurstöðum rann-
sókna á erfðafylgni milli beinna áhrifa og
móðuráhrifa á haustþunga lamba.
Genetic correlation between direct and maternal
effects for weaning weight of lambs
JÓN VlÐAR JÓNMUNDSSON
Búnaðarfélag Islands.
The paper describes results of a study on
the genetic correlation between direct and
HEIMILDASKRÁ:
Aðalstnnsson, S., 1966: Avkomsgransking av værer
— metodikk NJF Fellesmöte pá Island, 3—8
august, 1966. Stensil.
Aðalsteinsson, Stefán, 1971: Kynbótaeinkunn áa. ísl.
landbún., 3,1: 28—38.
Bradford, G. E., 1972: The role ofmaternal effects in
animal breeding VII. Maternal effects in sheep.
J. Anim. Sci., 35: 1324—1334.
Chang, T. S.,og Rae, A. L., 1972: The geneticbasis of
growht, reproduction, and maternal environ-
ment in Romney ewes II. Genetic covariation
between hogget characters, fertility, and mater-
nal environment ofewe. Aust. J. Agric. Res., 23:
149—165.
Eikje, E. D., 1975: Studies on sheep production
records. VII. Genetic, phenotypic and environ-
mental parameters for productivity traits ofewes.
Acta Agric. Scand., 25: 242—252.
Eisen, E.J., 1974: The laboratory mouse as a
mammalian model for the genetics of growth. 1 st
World Congress on Genetics applied to Livestock
Production. 7th—llth October 1974, Madrid.
1-Plenary sessions: 467—492.
Foulley, J. L., og Lefort, G., 1978: Méthodes
destimation des effects directs et maternels en
sélection animale. Anim. Génét. Sél. anim., 10:
475—496.
Hallgrímsson, Sveinn, 1971: Niðurstöður athugana á
arfgengi lifandi þunga og fallþunga lamba. Bú-
fjárræktarráðstefna, 1971 3 bls.
maternal effects for weaning weight of
lambs.
Obervations on the progenis of 3325
rams recorded in the Sheep Breeding Ass-
ociations in Iceland were included. These
rarns had sired a least ten lambs with
weight records as well as at least ten
daughters with production records. The
correlation was estimated —0.43 as-
suming that h2d=h2m=0.20.
Hanrahan, J. P., 1976: Maternal effects and select-
ion response with an application to sheep data.
Anim. Prod., 22:359—369.
Jónmundsson, Jón Viðar, 1971: Variasjonsársaker for
haustvekt av lam og muligheter for seleksjon.
Hovedoppgave NLH, 98s.
Jónmundsson, Jón Viðar, 1977a: A study of data from
the sheep recording associations in Iceland. I.
Sources of variation in weight of lambs. Isl.
landbún., 9,1:16—30.
Jónmundsson,Jón Viðar, 1977b: A study of data from
the sheep recording associations in Iceland II.
Ewe production traits. Isl. landbún., 9,1:31—42.
Jónmundsson, Jón Viðar, 1979: Einkunnir í búfjár-
ræktarfélögunum. Handbók bænda, 29:
187—199.
Jónmundsson, Jón Viðar, Aðalsteinsson, Stefán, og
Steingrímsson, Jón Trausti, 1977: Ullarþungi áa og
tengsl hans við aðra framleiðslueiginleika. Isl.
landbún., 9,1:50—62.
Koch, R. M, 1972: The role of maternal effects in
animal breeding. VI. Maternal effects in beef
cattle. J. Anim. Sci., 35:1316—1323.
Nitter, G., ogSchlote, IV., 1979: Maternal effects and
ram evaluation E. A. A. P., Harrogate,July 1979,
4 bls.
Robison, 0. W., 1979: The iníluence ofmaternal eff-
ects on the efficiency of selection. E. A. A. P.,
Harrogate, July 1979, 8 bls.