@conference {40606,
	title = {Reproductive performance of ewes after grazing on G27 red clover, a low formononetin selection in cultivar Pawera.},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {54},
	year = {1994},
	month = {Jan},
	pages = {231-234},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {One hundred and fifty ewes grazed either on a high oestrogenic red clover  
(Pawera), or a new, low oestrogenic selection of red clover (G27), or control  
pastures before mating.  The treatment groups (n = 25) and grazing lengths  
prior to mating were (1) Pawera, 6 weeks; (2) G27, 6 weeks; (3) G27, 12  
weeks; (4) G27/Ryegrass-white clover (rg-wc), 6 weeks/6weeks; (5) Rg-wc  
(control 1), 6 weeks, and (6) White clover (control 2), 6 weeks.  The ewes were  
mated as one group on rg-wc pasture immediately after the grazing treatments.   
Formononetin concentration was significantly lower in G27 (0.26\%) than in  
Pawera red clover (0.55\%) (P<0.05).  Ovulation rates in ewes after the first  
service were similar for all treatment groups (P<0.05).  The incidence of return  
to service was significantly higher in Pawera ewes (72.7\%) than in any of the  
other groups (P<0.01).  The return rates for the other groups were 33.3\%  
(G27/6weeks), 25.0\% (G27/12 weeks), 4.8\% (G27/rg-wc), 9.5\% (rg-wc) and  
14.3\% (white clover).  Most ewes which were mated at the next two cycles  
became pregnant.  It is concluded that the fertility in the ewes grazing G27 red  
clover was better than that in ewes grazing Pawera red clover, however there  
may have been some impairment in contrast to animals grazing control pasture. },
	issn = {1176-5283},
	author = {McDonald MF and Anwar M and Keogh RG}
}
@conference {40607,
	title = {Residual effect of a four weeks grazing of oestrogenic red clover on reproductive performance of ewes in the following six weeks.},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {54},
	year = {1994},
	month = {Jan},
	pages = {235-238},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The trial was conducted to study if the temporary infertility in ewes  
induced by oestrogenic clover, would recover accompanied by a concomitant  
increase in ovulation rate and/or litter size following their removal to a  
{\textquoteright}safe{\textquoteright} pasture.  Romney ewes (N - 155) either grazed on Pawera red clover or  
Ryegrass-white clover (control) pasture for four weeks.  Afterwards all ewes  
grazed ryegrass-white clover pasture and were mated in 3 groups either at the  
first, third or sixth week post-treatment.  Mean ovulation rate was significantly  
lower (P<0.05) in the Pawera ewes (1.22 {\textpm} 0.06) than in the controls (1.49 {\textpm}  
0.07) on respective treatments after two weeks of grazing.  Ovulation rates in  
ewes after the 1st, 2nd and 3rd mating cycle were 1.60 {\textpm} 0.12, 1.41 {\textpm} 0.10, 1.27  
{\textpm} 0.09 (red clover), and 1.64 {\textpm} 0.10, 1.67 {\textpm} 0.12, 1.30 {\textpm} 0.90 (control)  
respectively.  Ovulation rate and litter size were similar for the two treatment  
groups after joining in week 1, 3 or 6 post-treatment (P>0.05).  No increase in  
ovulation rate/litter size in Pawera group ewes was observed over and above  
those observed in the control ewes within the six week post-treatment period. },
	issn = {1176-5283},
	author = {Anwar M and Keogh RG and McDonald MF}
}
@conference {40513,
	title = {Oestrus, ovarian activity and embryo survival in ewes grazing high and low oestrogenic red clover},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {53},
	year = {1993},
	month = {Jan},
	pages = {303-305},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Seasonal wool growth pattern, colour variation and associated wool characteristics were measured in a fleece weight selected (HFW) and its control (RC) flocks. Both flocks had a significant (p<0.01) decline in wool growth rate in winter compared with summer. The HFW advantage over RC averaged 19\% and 33\% for ewes, 24\% and 36\% for hoggets, in summer and winter respectively. Yield and fibre diameter patterns were closely associated with wool growth. There were no flock differences in either brightness or yellowness, however both Y and Z tritimulus values were lower in spring and summer while yellowness was higher in summer than other seasons. The results suggest that selection for HFW reduces the relative winter wool growth decline compared with RC.},
	issn = {1176-5283},
	author = {Anwar M and Keogh RG and McDonald MF}
}
