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Repeatability of some basic reproductive characters in sows and possibilities for predicting their future productivity


Genetika i Selektsiya 16(2): 157-163
Repeatability of some basic reproductive characters in sows and possibilities for predicting their future productivity
The repeatability coefficients for number of live born pigs and for pig litter weight at the 21st day were estimated in single consecutive litters of 2 Large White herds including 700 and 346 sows, respectively. The coefficients were low and varied in both herds from 0.02-0.27. Repeatability coefficients were estimated for the same characters in 150 Large White sows up to the 6th litter and in 2 German noble breeds herds with 182 and 150 sows, respectively, up to the 5th litter. The repeatability coefficients between the value of the characters concerning the 1st litter and the mean life productivity up to the 6th and 5th litters, respectively, were high and varied in respect to the different characters, herds and breeds within a range of 0.43-0.74. Low values were obtained by estimating the repeatability coefficients between the already realized and the expected future productivity-I:(II + III + IV + V + VI)/5 or (I + II)/2: (III + IV +V +VI)/4 and I:(II + III + IV + V)/4 or (I + II)/2: (III + IV + V)/3. The number of live born piglets and the litter weight on the 21st day in the Large White varied from 0.23-0.34, while in the 2 German noble breed herds varied from 0.06-0.33. The repeatability coefficients between the realized and the expected productivity of sows ought to be used in predicting their future productivity.

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Accession: 006312816



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