Luteolytic effect of prostaglandin F2α in Boran and Boran × Friesian cross-bred heifers
Date
1993Author
Mutigaa, ER
Mukasa-Mugerwaa, E
Azagea, T
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
The luteolytic effect of prostaglandin F2α (PGF2α) during the confirmed luteal phase of the oestrous cycle was evaluated in ten Boran and ten Boran × Friesian cross-bred heifers. Following injection with 25 mg Lutalyse, animals were bled every 6 h for 96 h and plasma progesterone (P4) determined by the ELISA technique. Borans had significantly (P < 0·05) smaller corpora lutea (12·01±0·72 ν. 17·03±2·10 mm) and responded faster to PGF2α injection (65·57±1·40 ν. 78·27±2·18 h) than the cross-bred heifers. However, there was no significant difference in either the initial P4 values (6.24±0·98 ν. 8·00±1·71 ng/ml) or the rate of its decline following PGF2α injection between the two breeds. Values declined sharply to basal levels (11% of the initial pretreatment values) within 48 h in both breeds. All ten cross-breds and eight Borans showed standing oestrus within a week of treatment. However, oestrus was better synchronized (P < 0·05) in Borans than cross-breds. It was concluded that PGF2α is effective for oestrus synchronization in both breeds, but oestrus occurred earlier and was more precise in Borans than in cross-breds.
URI
http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=4800944http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/33365
Citation
E. R. Mutiga, E. Mukasa-Mugerwa and T. Azage (1993). Luteolytic effect of prostaglandin F2α in Boran and Boran × Friesian cross-bred heifers. The Journal of Agricultural Science, 120, pp 103-106. doi:10.1017/S0021859600073652.Publisher
University of Nairobi Department of Clinical Studies, University of Nairobi