Genetic contribution of ram on litter size in Šumava sheep  

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F15%3A%230002279" target="_blank" >RIV/00027014:_____/15:#0002279 - isvavai.cz</a>

Result on the web

<a href="http://www.pfos.hr/~poljo/sites/default/data/2015_1%20s1/37%20schmidova.pdf" target="_blank" >http://www.pfos.hr/~poljo/sites/default/data/2015_1%20s1/37%20schmidova.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.18047/poljo.21.1.sup.37" target="_blank" >10.18047/poljo.21.1.sup.37</a>

Result language

angličtina

Original language name

Genetic contribution of ram on litter size in Šumava sheep  

Original language description

The objective of the present study was to quantify the service sire effect in terms of (co) variance components of born and weaned lambs number and to propose models for the potential inclusion of this effect in the linear equations for breeding value estimation. The database with 21,324 lambings in Šumava sheep from 1992- 2013 was used. The basic model equation for the analysis of variance of litter size contained effects of ewe´s age at lambing, contemporary group, permanent environmental effect of ewe and direct additive genetic effect of ewe. Two modifications of the basic model were used for estimation of service sire effect. The proportions of variance for the service sire effect for number of born and weaned lambs were 2.1% and 2.0%, when service sire was not included into relationship matrix, while included into the relationship matrix and dividing effect into genetic contribution and permanent environment effect refer that nongenetic effect seems to be bigger than genetic (0.013 vs. 0.009 for number of born and 0.017 vs. 0.004 for number of weaned). Changes in other variance components were relatively low, except of contemporary group. Model including service sire effect as a simple random effect without genetic relationship matrix inclusion is recommended for genetic evaluation of litter size traits.

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

GI - Farm animal breeding and farm animal pedigree breeding

OECD FORD branch

—

Project

<a href="/en/project/QJ1310184" target="_blank" >QJ1310184: Breeding on offspring survival in beef cattle and sheep.</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Poljoprivreda

ISSN

1330-7142

e-ISSN

—

Volume of the periodical

21

Issue of the periodical within the volume

1

Country of publishing house

HR - CROATIA

Number of pages

4

Pages from-to

159-162

UT code for WoS article

—

EID of the result in the Scopus database

—