Book of Abstracts of the 70th Annual Meeting of the European Federation of Animal Science
| Autor: | Aurélien Madouasse, Sarah-Lina Schild, Julius Van der Werf, Ines Adriaens, Wouter Saeys, José Antonio Díaz Olivares, Lore D'Anvers, Béke Nivelle, Mogens Krogh, Edyta Bauer, Nicola Lambe, Joanne Conington, Claire Morgan-Davies, Teodoro Montanaro, Angela Costa, Aila Vanhatalo, Maria de Fátima Santos Silva, Davy McCracken, Bert Driessen, Joao Filipe, Vincent Thenard, Anni Ilona Karoliina Halmemies-Beauchet-Fillea, Tine Rousing, Ruben Smets, Sam Clark, Antonella Fatica, Leslie Foldager, Tuomo Juhani Kokkonen, Ben Aernouts |
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| Rok vydání: | 2019 |
| Předmět: |
2. Zero hunger
Litter (animal) 040301 veterinary sciences Restricted maximum likelihood media_common.quotation_subject Domestic sheep reproduction 0402 animal and dairy science Fertility 04 agricultural and veterinary sciences Best linear unbiased prediction Biology Heritability Random effects model 040201 dairy & animal science 0403 veterinary science Animal science Texel media_common |
| DOI: | 10.3920/978-90-8686-890-2 |
| Popis: | In 2018 breeding value estimates of fertility traits were introduced for the Swiss minor sheep breeds Charolais (CHS, litters=2,540), Dorper (DOP, litters=1,763), Shropshire (SHR, litters=1,130), Suffolk (SU, litters=2,030) and Texel (TEX, litters=2,355). There was used the same principle as for the four major Swiss sheep breeds namely White Alpine (WAS, litters=63,445), Black-Brown Mountain (SBS, litters=21,353), Valais Blacknose (SN, litters=31,668), and Brown Headed Meat sheep (BFS, litters=25,300). We selected the following four traits to assess the breeding value (BV) using REML and BLUP methods: age at first lambing (BV1), lambing interval (BV2), litter size one (BV3) and litter size two (BV4). The last two traits are the number of lambs at the first and second lambings. The pedigree data comprised 30,963, 12,322, 9,191, 18,593 and 18,743 for CHS, DOP, SHR, SU and TEX, respectively. The statistical model accounted for fixed effects of herd×year of the first lambing (BV1, 2, 3 and 4), season of the first lambing (BV1 and 3) and random effects of animals and residuals (BV1, 2, 3 and 4). The heritability estimates vary from 0.13-0.51 (age at first lambing), 0.05-0.13 (lambing interval), 0.08-0.11 (litter size one) and 0.01-0.05 (litter size two) for the four traits and the five breeds, respectively. This heritabilities correspond to the values from the major sheep breeds and are comparable between the breeds. The phenotypic correlations between all traits were positive and range from 0.02 to 0.34 for all breeds. On the other hand, 12 of the 30 genetic correlations were negative and range between -0.03 to -0.4. Most of the negative correlation coefficients were found for BV2-BV3 (DOP, TEX=-0.07, SU=-0.17, SHR=-0.4) and BV1-BV3 (TEX=-0.11, SU=-0.18, DOP=-0.36). The genetic correlations between BV3 and BV4 were 1.0 for the breeds DOP and SHR. The reasons for these high values could be the low number of litters. The other results seem to be plausible and show, that genetic improvement trough selection would be possible in sheep fertility traits. |
| Databáze: | OpenAIRE |
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