| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Centre for Food and Animal Research, Research Branch, Agriculture Canada, Ottawa, Canada ON, K1A 0C6
2 Lennoxville Research Station, Lennoxville, PQ. Canada J1M 1Z3
3 Lethbridge Research Station, Lethbridge, AB, Canada T1J 4B1
4 Experimental Farm, Normandin, PQ, Canada G0W 2E0
5 Charlottetown Research Station, Charlottetown, PE, Canada C1A 7M5
Additive and nonadditive genetic effects on lifetime yields of milk and milk components and lifetime profitability were estimated from 5070 cattle in a Holstein pureline, an Ayrshire-based pureline, and 10 crossbred groups of these purelines.
Lifetime yields of milk, fat, protein, and lactose and lifetime milk value and annualized discounted net returns were analyzed. Lifetime yields, lifetime milk value, and annualized discounted net returns of the Holstein x Ayrshire-based line F1 and an F1 x (F1 x F1) cross were not significantly different from those for the Holstein pureline. Net reproductive rate for F1 females was 9% greater than that of contemporary Holsteins. The Holstein pureline was superior to the Ayrshre-based pureline for direct additive genetic merit for all traits. Heterosis for the lifetime traits ranged from 16.6% for lifetime milk yield to 20.6% for annualized discounted net returns. Cytoplasmic maternal effect on annualized discounted net return was significant and favored the Ayrshire-based line. Potential economic benefit may derive from development of a crossbred cow that is superior to Holsteins. Maximum exploitation of additive and nonadditive genetic effects on lifetime yields and profitability appears to favor a rotational crossbreeding system with two breeds.
Key Words: crossbreeding • lifetime • yields • gene effects • nonadditive
Submitted on July 23, 1993
Accepted on February 16, 1994
This article has been cited by other articles:
|
|
 |
|
  M. K. Sorensen, E. Norberg, J. Pedersen, and L. G. Christensen Invited Review: Crossbreeding in Dairy Cattle: A Danish Perspective J Dairy Sci, November 1, 2008; 91(11): 4116 - 4128. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. J. Heins, L. B. Hansen, A. J. Seykora, D. G. Johnson, J. G. Linn, J. E. Romano, and A. R. Hazel Crossbreds of Jersey x Holstein Compared with Pure Holsteins for Production, Fertility, and Body and Udder Measurements During First Lactation J Dairy Sci, March 1, 2008; 91(3): 1270 - 1278. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. D. Dechow, G. W. Rogers, J. B. Cooper, M. I. Phelps, and A. L. Mosholder Milk, Fat, Protein, Somatic Cell Score, and Days Open Among Holstein, Brown Swiss, and Their Crosses J Dairy Sci, July 1, 2007; 90(7): 3542 - 3549. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. Maltecca, H. Khatib, V. R. Schutzkus, P. C. Hoffman, and K. A. Weigel Changes in conception rate, calving performance, and calf health and survival from the use of crossbred Jersey x Holstein sires as mates for Holstein dams. J Dairy Sci, July 1, 2006; 89(7): 2747 - 2754. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. J. Heins, L. B. Hansen, and A. J. Seykora Production of pure Holsteins versus crossbreds of Holstein with Normande, Montbeliarde, and Scandinavian Red. J Dairy Sci, July 1, 2006; 89(7): 2799 - 2804. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. Wall, S. Brotherstone, J. F. Kearney, J. A. Woolliams, and M. P. Coffey Impact of Nonadditive Genetic Effects in the Estimation of Breeding Values for Fertility and Correlated Traits J Dairy Sci, January 1, 2005; 88(1): 376 - 385. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. A. Weigel and K. A. Barlass Results of a Producer Survey Regarding Crossbreeding on US Dairy Farms J Dairy Sci, December 1, 2003; 86(12): 4148 - 4154. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. M. VanRaden and A. H. Sanders Economic Merit of Crossbred and Purebred US Dairy Cattle J Dairy Sci, March 1, 2003; 86(3): 1036 - 1044. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
