PT  - JOURNAL ARTICLE
AU  - Tvrdoň, Zdeněk
AU  - Humpolíček, Petr
TI  - Impact of hyperprolific line of litter size in multiplication herd
DP  - 2014 Oct 14
TA  - Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
PG  - 151--154
VI  - 57
IP  - 2
AID - 10.11118/actaun200957020151
IS  - 12118516
AB  - The hyperprolific line is considered to be maximally effective in pursuit of progress in sow's reproduction. Hyperprolific line efficiency is commonly evaluated in regard of breeding herd progress. We decided to study how effective it is with respect to increasing of litter size in multiplication herd. Our study is specific by using the data from practice, concretely it is based on the information about the ancestor of sows in multiplication herd. The ancestors could be the member either hyperprolific line or normal line. The information about performances of sows breed in multiplication herd was known. The mixed linear models in SAS for Windows 9.1.2. were conducted to statistical analysis. Our results indicated that no significant effect on litter size was achieved by selection criteria used in the hyperprolific line creation. In studied population no differences between TNB, NBA or NW were found on the 1<sup>st</sup> as well as on the 1<sup>st</sup>-5<sup>th</sup> litters. As we have mentioned above, the study is specific by using the data from practice. Therefore the studied population size is limited. It is necessary to take into consideration when the results are applied. Nevertheless, the results shown that other studies with larger population should be done to reevaluate the selection criteria.