527. A study of variation in twin cattle: II. Fertility
- 1 October 1953
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Dairy Research
- Vol. 20 (3), 361-369
- https://doi.org/10.1017/s0022029900007019
Abstract
1. Results from a uniformity trial with fifteen pairs each of one-egg and two-egg twins and pairs of half-sibs are described. 2. Intra-pair variance in age at the first observed heat was less for the one-egg than for the other pairs but not significantly so. The slowest growing pairs showed delay in onset of heat. 3. 71·8% of the intervals between heats shown by unserved heifers were 17–27 days in length. No genetic variation and no individuality could be detected in either this character or the number of services per conception. 4. The variance in the gestation period was less within the one-egg than within the other pairs but not significantly so.Keywords
This publication has 5 references indexed in Scilit:
- 526. A study of variation in twin cattle: I. General descriptionJournal of Dairy Research, 1953
- LENGTH OF THE GESTATION PERIOD IN BEEF CATTLEJournal of Heredity, 1952
- Factors Associated with the Duration of Gestation in Dairy CattleJournal of Dairy Science, 1952
- The Effect of Low Manganese Rations upon Dairy CattleJournal of Dairy Science, 1951
- Causes of Variation in Length of Gestation in Dairy CattleJournal of Animal Science, 1950