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Effect of management with and without litter and of rearing season on the results of conformation evaluation of Polish Large White and Polish Landrace gilts

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Kulisiewicz J., Szumlewicz P., Batorska M., Poczta P.

Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego

2011

tom 07

nr 4

The studies were carried out with 683 gilts of Polish Large White (PLW) breed and 698 gilts of Polish Landrace (PL) breed. The subject of the studies included linear evaluation of incidence and intensity of conformation defects, being conducted with the application of scale of scores: 0 points – lack of defect; 1 point – small defect; 2 points – distinct defect. The effect of the systems of housing (on litter and without litter) and of the period of rearing (“warm” period – born since March to August and “cold” period – born from September to February) was examined. The housing factor had a strong influence on conformation traits. The sows of PL breed as well as of PLW breed, kept on the litter, received considerably more favourable scores for confirmation as compared to the animals managed without litter. Higher, more unfavorable effect of litter-less management on the traits of hind legs as compared to the fore legs, was recorded. The most unfavorable effect of litter-less management as compared to that one on the litter concerned uneven hooves and X-shaped position of hind legs (P<0.001). The gilts being reared in the “warm” months obtained more favorable total evaluation of confirmation in comparison to the animals managed during “cold” months (P<0.05). Differences in total evaluation of the conformation, caused by the season of rearing, were the result of summing of the small, most frequently statistically insignificant differences in respect of detailed trait.

Ograniczanie wyników

1 Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego

1 Batorska M.

1 Kulisiewicz J.

1 Poczta P.

1 Szumlewicz P.

1 2011

Wyniki wyszukiwania

Effect of management with and without litter and of rearing season on the results of conformation evaluation of Polish Large White and Polish Landrace gilts