Seasonal fluctuations in plasma progesterone concentrations in Gentile-di-Puglia and Ile-de-France ewes in southern Italy.
Ile-de-France ewes had high plasma progesterone concentrations during early summer-late winter. Gentile-di-Puglia ewes had high progesterone values during the winter-spring-summer period but during autumn progesterone values were very low and oestrous behaviour was not displayed. The comparison with Ile-de-France ewes indicates that a phase shift occurs in the annual ovarian activity in ewes of the Gentile-di-Puglia breed.
Dell'Aquila
S
S
Istituto Sperimentale per la Zootecnia, Foggia, Italy.
Varriale
B
B
Alberico
G
G
Pierantoni
R
R
D000818:Animals; D005260:Female; D008027:Light; D010053:Ovary / Q000502:physiology; D011374:Progesterone / Q000097:blood*; D012621:Seasons; D012756:Sheep / Q000097:blood*
D011374:Progesterone