TY  - CONF
AU  - Radojković, Dragan
AU  - Petrović, M
AU  - Parunović, N
AU  - Radović, C
AU  - Radović, L
AU  - Popovac, Mladen
AU  - Savić, Radomir
AU  - Gogić, M
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5542
AB  - Variance components for sow litter size traits were estimated using the REML method. Number of live born piglets (NBA), number of still born piglets (NSB), number of total born piglets (NTB) and number of weaned piglets (NW) were treated as traits which repeated several times during sow lifetime - repeatability model. Results of the fertility of Swedish Landrace sows realized on three pig farms in the Republic of Serbia were presented in four data sets DS1 (farm 1), DS2 (farm 2), DS3 (farm 3) and DS23 (farms 2 and 3 together). Fixed part of the model for litter size traits at farrowing (NBA, NSB and NTB) included parity, mating season as year-month interaction, litter genotype and weaning to conception interval as class effects. The age at farrowing was modelled as a quadratic regression nested within parity, whereas preceding lactation length was included as linear regression.  In case of NW the model included parity, weaning season as year-month interaction, number of piglets in litter subsequent to crossfostering and litter genotype as class effects. The age at farrowing was included into the model in the same way as in case of previous traits. Random part of the model was the same for all analysed traits and represented as effect of common environment in litter where sows had been born, permanent effect of environment in sows’ litters and direct additive genetic effect. Heritability of NBA varied between 0.050 (DS2) and 0.076 (DS3), NSB between 0.004 (DS3) and 0.027 (DS2), NTB between 0.065 (DS2) and 0.073 (DS3) and of NW between 0.010 (DS2) and 0.028 (DS1). Share of permanent environment of sow in phenotypic variance was higher than share of litter effect and mostly lower than share of direct genetic effect.
C3  - International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia
T1  - Estimation of the Variance Components of the Sow Litter Size Traits Using Reml Method - Repeatability Model
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5542
ER  - 

@conference{
author = "Radojković, Dragan and Petrović, M and Parunović, N and Radović, C and Radović, L and Popovac, Mladen and Savić, Radomir and Gogić, M",
year = "2014",
abstract = "Variance components for sow litter size traits were estimated using the REML method. Number of live born piglets (NBA), number of still born piglets (NSB), number of total born piglets (NTB) and number of weaned piglets (NW) were treated as traits which repeated several times during sow lifetime - repeatability model. Results of the fertility of Swedish Landrace sows realized on three pig farms in the Republic of Serbia were presented in four data sets DS1 (farm 1), DS2 (farm 2), DS3 (farm 3) and DS23 (farms 2 and 3 together). Fixed part of the model for litter size traits at farrowing (NBA, NSB and NTB) included parity, mating season as year-month interaction, litter genotype and weaning to conception interval as class effects. The age at farrowing was modelled as a quadratic regression nested within parity, whereas preceding lactation length was included as linear regression.  In case of NW the model included parity, weaning season as year-month interaction, number of piglets in litter subsequent to crossfostering and litter genotype as class effects. The age at farrowing was included into the model in the same way as in case of previous traits. Random part of the model was the same for all analysed traits and represented as effect of common environment in litter where sows had been born, permanent effect of environment in sows’ litters and direct additive genetic effect. Heritability of NBA varied between 0.050 (DS2) and 0.076 (DS3), NSB between 0.004 (DS3) and 0.027 (DS2), NTB between 0.065 (DS2) and 0.073 (DS3) and of NW between 0.010 (DS2) and 0.028 (DS1). Share of permanent environment of sow in phenotypic variance was higher than share of litter effect and mostly lower than share of direct genetic effect.",
journal = "International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia",
title = "Estimation of the Variance Components of the Sow Litter Size Traits Using Reml Method - Repeatability Model",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5542"
}

Radojković, D., Petrović, M., Parunović, N., Radović, C., Radović, L., Popovac, M., Savić, R.,& Gogić, M.. (2014). Estimation of the Variance Components of the Sow Litter Size Traits Using Reml Method - Repeatability Model. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia.
https://hdl.handle.net/21.15107/rcub_agrospace_5542

Radojković D, Petrović M, Parunović N, Radović C, Radović L, Popovac M, Savić R, Gogić M. Estimation of the Variance Components of the Sow Litter Size Traits Using Reml Method - Repeatability Model. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia. 2014;.
https://hdl.handle.net/21.15107/rcub_agrospace_5542 .

Radojković, Dragan, Petrović, M, Parunović, N, Radović, C, Radović, L, Popovac, Mladen, Savić, Radomir, Gogić, M, "Estimation of the Variance Components of the Sow Litter Size Traits Using Reml Method - Repeatability Model" in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia (2014),
https://hdl.handle.net/21.15107/rcub_agrospace_5542 .