Contributions from Genetic Groups and Outcrossing to Components of Reproduction in Maternal Sheep Breeds

Author(s)
Bunter, K L
Swan, A A
Brown, D J
Publication Date
2019
Abstract
Industry data for traits included in the new multi-trait genetic evaluation for reproductive traits provided by Sheep Genetics were used to investigate variation due to sub-populations (genetic groups) and due to outcross ewe genotypes in maternal sheep breeds. Substantial variation due to genetic groups (gg² : typically 11-30% of the phenotypic variance) for traits reflecting development (eg weight, condition score, muscle depth) were not accompanied by comparable variation for reproductive traits (gg² : 0-8%). Variation due to outcross ewe genotypes ranged from 0 to 8% across traits, being highest for adult ewe weight (8%) and yearling conception (6%) traits, which are expected to be affected by heterosis. Accommodating these sources of variation appropriately may be important for the genetic evaluation of data affected by admixture of populations.
Citation
Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.23, p. 99-102
ISSN
1328-3227
Link
Publisher
Association for the Advancement of Animal Breeding and Genetics (AAABG)
Title
Contributions from Genetic Groups and Outcrossing to Components of Reproduction in Maternal Sheep Breeds
Type of document
Conference Publication
Entity Type
Publication

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