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A note on the breeding season of Lincoln ewes at Bahia Blanca, Argentina

  • R. M. Rodriguez Iglesias (a1), C. Giglioli (a1) and H. Irazoqui (a1)

Abstract

Days elapsed from the mid point of the anoestrous period to first (DF) and last (DL) oestrus of the breeding season and duration of this breeding season (DD) within a flock of 60 adult Lincoln ewes are reported in this note. All traits showed considerable variation and the phenotypic correlation between DF and DD was −0·57 (P < 0·01) while that between DL and DD was 0·87 (P < 0·01). However, DF was not correlated with DL (P = 0·10).

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Gilmour, A. R. 1985. REG: a generalized linear models program. Miscellaneous Bulletin, Department of Agriculture, New South Wales, Australia, No. 1.
Hanrahan, J. P. and Quirke, J. F. 1986. Breeding season and multiple births in small ruminants. Proceedings of 3rd World Congress on Genetics Applied to Livestock Production, Lincoln, Nebraska, Vol. XII, pp. 3045.
Nelder, J. A. and Wedderburn, R. W. M. 1972. Generalized linear models. Journal of the Royal Statistical Society A 135: 370384.
Quirke, J. F., Hanrahan, J. P., Loughnane, W. and Triggs, R. 1986. Components of the breeding and non-breeding seasons in sheep: breed effects and repeatability. Irish Journal of Agricultural Research 25: 167172.
Rodriguez Iglesias, R. M., Giglioli, C., Latimori, N. and Irazoqui, H. 1987. Ovulation rate of Lincoln ewes at Bahia Blanca, Argentina. Animal Production 45: 459464.

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A note on the breeding season of Lincoln ewes at Bahia Blanca, Argentina

  • R. M. Rodriguez Iglesias (a1), C. Giglioli (a1) and H. Irazoqui (a1)

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