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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
16/11/2023 |
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Autoria: |
HANRAHAN, J. P.; QUIRKE, J. P. |
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Título: |
Repeatability of the duration of oestrus and breed differences in the relationship between druation of oestrus and ovulation rate of sheep. |
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Ano de publicação: |
1975 |
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Fonte/Imprenta: |
Journal of Reproduction and Fertility, v. 45, n. 1, p. 29-36, 1975. |
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DOI: |
10.1530/jrf.0.0450029. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The duration of oestrus and the time interval from removal of progestagen-impregnated pessaries to the onset and end of oestrus were examined in Texel, Finnish Landrace, Galway and Fingalway (Finnish Landrace X Galway) ewes. The differences among the breeds in the relationship between these variables and ovulation rate at the controlled oestrus were also investigated. Breed differences were significant for all traits except the interval from pessary withdrawal to the onset of oestrus. The relationship between ovulation rate and both the interval from pessary withdrawal to the onset of oestrus and the duration of oestrus differed significantly among the breeds. The repeatability of the duration of oestrus was significant for Texel and Rambouillet ewes (mean = 0.5) and for pooled data from ewe lambs of various breeds. It was concluded that, in view of the breed differences in the relationship between ovulation rate and duration of oestrus and other traits, generalizations should not be made from among-breed to within-breed relationships. The high repeatability for the duration of oestrus may mean substantial heritabilities for the physiological determinants of oestrus duration. |
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Palavras-Chave: |
Estro; Flurogestone Acetate; Oestrous cycle; Species Specificity; Taxa de ovulação; Time Factors. |
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Thesagro: |
Ciclo Estral; Ovino; Reprodução. |
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Thesaurus Nal: |
Estrus; Ovulation; Pharmacology; Repeatability; Reproduction; Sheep. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02139naa a2200325 a 4500
001 1522085
005 2023-11-16
008 1975 bl uuuu u00u1 u #d
024 7 $a10.1530/jrf.0.0450029.$2DOI
100 1 $aHANRAHAN, J. P.
245 $aRepeatability of the duration of oestrus and breed differences in the relationship between druation of oestrus and ovulation rate of sheep.
260 $c1975
520 $aAbstract: The duration of oestrus and the time interval from removal of progestagen-impregnated pessaries to the onset and end of oestrus were examined in Texel, Finnish Landrace, Galway and Fingalway (Finnish Landrace X Galway) ewes. The differences among the breeds in the relationship between these variables and ovulation rate at the controlled oestrus were also investigated. Breed differences were significant for all traits except the interval from pessary withdrawal to the onset of oestrus. The relationship between ovulation rate and both the interval from pessary withdrawal to the onset of oestrus and the duration of oestrus differed significantly among the breeds. The repeatability of the duration of oestrus was significant for Texel and Rambouillet ewes (mean = 0.5) and for pooled data from ewe lambs of various breeds. It was concluded that, in view of the breed differences in the relationship between ovulation rate and duration of oestrus and other traits, generalizations should not be made from among-breed to within-breed relationships. The high repeatability for the duration of oestrus may mean substantial heritabilities for the physiological determinants of oestrus duration.
650 $aEstrus
650 $aOvulation
650 $aPharmacology
650 $aRepeatability
650 $aReproduction
650 $aSheep
650 $aCiclo Estral
650 $aOvino
650 $aReprodução
653 $aEstro
653 $aFlurogestone Acetate
653 $aOestrous cycle
653 $aSpecies Specificity
653 $aTaxa de ovulação
653 $aTime Factors
700 1 $aQUIRKE, J. P.
773 $tJournal of Reproduction and Fertility$gv. 45, n. 1, p. 29-36, 1975.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
