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Genetic Improvement of Ewe Reproductive Traits in Rideau-Arcott

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dc.contributor.advisor Schenkel, Flavio Boareki, Mohammed 2017-09-07T16:15:20Z 2017-09-07T16:15:20Z 2017-09 2017-09-01 2017-09-07
dc.description.abstract The goals of this research were to estimate genetic correlations among parities, estimate genetic parameters among reproductive and growth traits, predict the selection response for the traits, and propose a selection index for ewe productivity. Because of major genetic differences found between reproductive traits in the first and subsequent parities, they were evaluated as two separate traits. Selection for reproductive traits in the first parity were predicted to result in greater correlated response in later parities than direct selection. Selection based on growth traits resulted in higher correlated response than direct selection on total weaning weight, a composite ewe reproductive trait, but it was accompanied by small negative response on litter size at birth. Such negative response was countered using a selection index. In addition, the use of selection index was predicted to improve the correlated response on the target composite reproductive trait over the direct selection. Selection response for ewe reproductive traits could be improved by indirect selection procedures. en_US
dc.description.sponsorship GenOvis en_US
dc.language.iso en en_US
dc.subject sheep reproductive en_US
dc.subject ewe productivity en_US
dc.subject litter size en_US
dc.subject selection index en_US
dc.title Genetic Improvement of Ewe Reproductive Traits in Rideau-Arcott en_US
dc.type Thesis en_US Animal and Poultry Science en_US Master of Science en_US Department of Animal Biosciences en_US
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