Íslenskar landbúnaðarrannsóknir - 01.09.1977, Síða 108

106 ÍSLENZKAR LANDBÚNAÐARRANNSÓKNIR
1974: Kynbótaskipulag fyrir íslenska kúastofn-
inn. Isl. landbúnaðarranns. 6 (1—2): 49—63.
Lindström, U., Maijala, K. og Vilva, V., 1971:
Studies on AI dairy sire provings. II. Sire x
region-interaction. Z. Tierzuchtg. Zuchtungs-
biol., 88: 1—11.
Mao, I. L. og Bmnside, E. B., 1969: Sire by herd
environment interaaion for milk produaion.
J. Dairy Sci., 52: 1055—1062.
Mason, I. L. og Robertsson, A., 1956: The pro-
geny testing of dairy bulls at different levels
of produaion. J. Agric. Sci., 47: 367—375.
McDaniel, B. T. og Corley, E. L., 1967: Rela-
tionships between sire evaluations at different
herdmate levels. J. Dairy Sci., 50: 735—741.
Norman, H. D., 1974: Factors that should be
considered in a national sire summary model.
J. Dairy Sci., 57: 955—962.
Petersen, P. H., 1975: Genotype-environment in-
teraction in milk produaion under Danish and
Bulgarian-Czeckoslowakian conditions. Anim.
Prod., 21: 101—108.
Rickardson, D. O., Owen, J. R., Plowman, R. D.
og Miles, J. T., 1971: Importance of sire ration
interaction in produaion and feed intake traits
of dairy cattle. J. Dairy Sci., 54: 1518—1525.
Robertson, A., 1959: The sampling variance of
the genetic correlation coeffident. Biometrics,
15: 469—485.
Robertson, A., 1960: The progeny testing of
dairy bulls. A comparison of tests on father
and son. J. Agric. Sci., 54: 100—104.
Robertson, A. og Mason, I. L., 195'6: The progeny
testing of dairy bulls. A comparison of special
station and field results. J. Agric. Sci., 47:
376—381.
Robertson, A., O’Connor, L. K. og Edwards, J.,
1960: Progeny testing dairy bulls at different
management levels, Anim. Prod., 2: 141—152.
Robertson, A. og Rendel, J. M., 1954: The per-
formance of heifers got by artificial insemina-
tion. J. Agric. Sci., 44: 184—192.
Robertson, A., Stewart, A og Ashton, E. D., 1956:
The progeny assessment of dairy sires for milk:
The use of contemporary comparisons. Proc.
Brit. Soc. Anim. Prod. 1956: 43—50.
Rönningen, K., 1967: Phenotypic and genetic
parameters for characters related to milk pro-
duaion in cattle. Aaa Agr. Scand., 17: 83—
100.
Stefánsson, Ólafur E., 1968: Nautgriparækt. í
Bættir eru bænda hættir, Þorri s/f Reykjavík,
1968: 95—106.
Syrstad, O., 1966: Studies on dairy herd records.
IV. Estimates of phenotypic and genetic para-
meters. Aaa Agr. Scand., 16: 79—96.
Syrstad, O., 1973: Opaimum stage of seleaing
among progeny tested bulls. Meld. Norg. Land-
br. Högsk., 52 nr. 26, 13 s.
Syrstad, O., 1976: Samspill arv-kraftfornivá i
mjölkproduksjonen. Meld. Norg. Landbr. Hög-
sk., 55 nr. 20, 8 s.
Tochberry, R. W., Rottersten, K. og Andersen, H.,
1960: A comparison of dairy sire progeny
tests made at special testing stations with tests
made in farmer herds. J. Dairy Sci., 43: 529
—543.
Van Vleck, L. D., 1963: Genotype and environ-
ment in sire evaluation. J. Dairy Sci., 46: 983
—987.
Van Vleck, L. D., Wadell, L. H. og Henderson,
C. R., 1961: Components of variance associated
with milk and fat records of artificially sired
Holstein daughters. J. Anim. Sci., 20: 812—
8i6.
Odegárd, A. K., 1968: Relationship between pro-
geny tests of fathers and sons. Acta Agr. Scand.,
18: 143—144.
Odegárd, A. K. og Robertson, A., 1967: A com-
parison of progeny tests for milk production on
fathers and sons. Aaa Agr. Scand., 17: 241—
246.