Naslov
Connectedness between management units and reliability of across herd evaluation in Landrace and Large White pigs

Autori
Luković, Zoran ; Škorput, Dubravko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 4th international congress "NEW PERSPECTIVES AND CHALLENGES OF SUSTAINABLE LIVESTOCK PRODUCTION" / Petrović, Milan et. al. - Beograd : Institute for Animal Husbandry, 2015, 296-302

ISBN
978-86-82431-71-8

Skup
4th international congress "NEW PERSPECTIVES AND CHALLENGES OF SUSTAINABLE LIVESTOCK PRODUCTION"

Mjesto i datum
Beograd, Srbija, 06.10.2015. - 09.10.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Pigs; connectedness; reliability; genetic evaluation

Sažetak
Impact of connectedness between management units on reliability of genetic evaluation was analyzed for Landrace (L) and Large White (LW) pigs and their crossbreds on 41 859 data records from three large scale pig farms and 70 family farms in period 1998-2014. Connectedness rating (CR) method was used to assess information about the level of connectedness. Average reliability of estimated breeding values was calculated for all contemporary groups in single and joint analysis for different combination of data. Focal trait for the analysis was backfat thickness. Average CR was less than 0.03 between all pairs of contemporary groups. Thus, across-herd validation would be unreliable due to low connectedness. After inclusion of data of crossbred animals in the data set, reliability increased from 0.24 to 0.38 on farm B in L and from 0.03 to 0.31 on farm C for LW. Results illustrate necessity to increase connectedness in order to increase individual of genetic evaluation and reliability of across-herd comparison. Adequate tool for increasing connectedness would be well organized artificial insemination.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA