Lambing of Romney and Booroola cross hoggets with and without
the F gene under different pasture allowances
R.W. Moore, W.H. McMillan, G. Dockrill and B.W. Dow
MAFTech, Whatawhata Research Centre, Hamilton and MAFTech,
Ruakura Agricultural Centre, Hamilton
Proceedings of the New Zealand Society of Animal Production.
1989, 49: 281-284
The hogget reproduction of 67 FF/F+ and 27 ++ (Booroola x
Romney) x (Booroola x Perendale), 30 Waihora (WR) and 39 Marshall Romney
(MR) hoggets was compared under 4 nutritional treatments. The September
born ewe lambs were grazed from 6 January to 5 June at 4 different
pasture allowances: 2, 4, 6, and 10 kg DM/ewe/d. Three allowances (2,
4, 10) were continued until 11 September, following this date all ewes
grazed together. There were significant effects of allowance on the
percentage of ewes tupped and pregnant. There was no effect of
genotype on these fertility traits. The percentages of ewes lambing
multiples/ewes lambing were FF/F+ 58, ++ 0, MR11, and WR 27. The
percentages of lambs weaned/lambs born were similar: 72, 59, 77 and 79
respectively. The percentages of lambs weaned/ewes joined were 58, 26,
26, and 49 respectively.
Keywords: NZSAPAB;
Hoggets; Romney; Booroola cross; F gene; grazing allowance;
fertility prolificacy
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Last Updated 18-03-1997
