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Registro Completo
Biblioteca(s):  Embrapa Caprinos e Ovinos.
Data corrente:  01/08/1992
Data da última atualização:  16/11/2023
Autoria:  HANRAHAN, J. P.; QUIRKE, J. P.
Título:  Repeatability of the duration of oestrus and breed differences in the relationship between druation of oestrus and ovulation rate of sheep.
Ano de publicação:  1975
Fonte/Imprenta:  Journal of Reproduction and Fertility, v. 45, n. 1, p. 29-36, 1975.
DOI:  10.1530/jrf.0.0450029.
Idioma:  Inglês
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.
Palavras-Chave:  Estro; Flurogestone Acetate; Oestrous cycle; Species Specificity; Taxa de ovulação; Time Factors.
Thesagro:  Ciclo Estral; Ovino; Reprodução.
Thesaurus Nal:  Estrus; Ovulation; Pharmacology; Repeatability; Reproduction; Sheep.
Categoria do assunto:  --
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Caprinos e Ovinos (CNPC)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status URL
CNPC8214 - 1ADDAP - PPSP 04338SP 04338
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