Abstract
Growth performance, feed conversion efficiency and nutrient utilization of mutton synthetic, selected and randombred Malpura populations of lambs (60 days) were evaluated. The mutton synthetic lambs reached the 25 kg body weight in 73 days of intensive feeding while the selected and randombred Malpura populations of lambs reached the same weight in 91 and 136 days, respectively ( P<0.01). The fitted growth curve confirmed the mutton synthetic lambs grew rapidly and were more efficient in feed conversion ( P<0.01) followed by selected and randombred Malpura lambs. Dry matter intake and nutrient utilization was similar in mutton synthetic and selected Malpura lambs and required 75 g DM, 5.5 g DCP and 42.1 g TDN/kg W 0.75 for average daily gain of 148 g. The lambs were in positive N, Ca and P balance whereas their N retention was lower (25%). It is concluded from this preliminary study that growth response and feed conversion efficiency were higher in mutton synthetic than selected Malpura lambs and lower in randombred Malpura lambs.
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