Data/hora: 04/06/2024 02:35:11

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 28/01/2019
Data da última atualização: | 28/01/2019
Autoria: | MAGID, A. F.; SWANSON, V. B.; BRINKS, J. S.; DICKERSON, G. E.; SMITH, G. M.
Título: | Border Leicester and finnsheep crosses. II. Productivity of F1 ewes.
Ano de publicação: | 1981
Fonte/Imprenta: | Journal of Animal Science, v. 52, n. 6, p. 1262-1271, Jun. 1981.
DOI: | https://doi.org/10.2527/jas1981.5261262x
Idioma: | Inglês
Conteúdo: | Production data on 285 lambings of crossbred ewes were collected at the Roman L. Hruska US Meat Animal Research Center, Clay Center, Nebraska, and used to compare Finnsheep (Finn)- and Border Leicester (BL)-sired ewes in matings with Suffolk sires. Matings were carried out in 1973, 1974 and 1975, and lambs were born in 1974, 1975 and 1976. Lambs from BL-sired ewes were (.6 kg) heavier at birth than lambs from Finn-sired ewes, and had superior vigor scores and less lambing difficulty, but were not significantly better in survival, pre-weaning gain or weaning weight. When adjusted for their lower rate of twinning, BL-sired lambs were only .3 kg heavier than Finn-sired lambs in birth weight, but 14% poorer in survival to weaning and no better in lambing difficulty, lamb vigor or weaning weight. BL-sired ewes were significantly below Finn-sired ewes in number of lambs born (-.39), number alive at birth (-.41), number alive at 28 days (-.28) and number alive at weaning (-.29), as well as in total weight of lambs born (-.4 kg) and weaned (-3.6 kg) per ewe lambing. Fertility was similar for BL- and Finn-sired ewes (68%). BL-sired ewes were only 1.3 kg heavier than Finn-sired ewes but produced .3 kg heavier clean fleeces and 1.7 cm longer stapled wool and 2.6 /µm coarser fibers.
Palavras-Chave: | Crossbreeding; Ewe productivity.
Thesaurus Nal: | Animal breeding; Animal genetics; Border Leicester; Crossbreds; Finnsheep; Sheep.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (38720-1) - ADD - AP - PP -  -  -  - DIS