Performance of crossbreed ewes R1 and R2 descended from grading Polish merino and suffolk
1999
Piwczynski, D. | Mroczkowski, S. (Akademia Techniczno-Rolnicza, Bydgoszcz (Poland). Wydzial Zootechniczny))
The investigations were carried out during 1986-92 on 678 ewes of the suffolk race, hybrids R1 (Polish merino ewes x suffolk rams) and R2 (R1 ewes x suffolk rams) progeny obtained from two first stages of grading suffolk rams with Polish merino ewes on Zalesie flock. The following traits association with dams production were analysed: reproductive and milk performance (litter body gain in period 2-28 days), wool productivity. Among the genotype's groups ewes R1 were characterised by: the best reproductive performance (fertility - 94.83 percent; prolificacy - 1.27 lambs on one ewes); lamb survival - 95.31 percent; lambs reared from 1 mated ewes - 1.15) and wool yield (3.41 kg). The suffolk dams represented the highest level of milk performance (9.03 kg). Results which achieved crossbreeds R2 were oblique - between Suffolk's and R1
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