scholarly journals Estimation of Genetic Parameters and Trends for Weaning-to-first Service Interval and Litter Traits in a Commercial Landrace-Large White Swine Population in Northern Thailand

2010 ◽  
Vol 23 (5) ◽  
pp. 543-555 ◽  
Author(s):  
C. Chansomboon ◽  
M. A. Elzo ◽  
T. Suwanasopee ◽  
S. Koonawootrittriron
Keyword(s):  
Genetic Parameters ◽  
Large White ◽  
Northern Thailand ◽  
Litter Traits ◽  
Swine Population ◽  
Estimation Of Genetic Parameters

scholarly journals Genetische Beziehungen für das Merkmal Lebenstagszunahme in einem Dreirassenkreuzungsprogramm beim Schwein

2002 ◽  
Vol 45 (5) ◽  
pp. 481-490
Author(s):  
R. Fischer ◽  
U. Müller ◽  
U. Bergfeld
Keyword(s):  
Parameter Estimation ◽  
Genetic Association ◽  
Genetic Parameters ◽  
Average Daily Gain ◽  
Genetic Correlations ◽  
Point Of View ◽  
Large White ◽  
Variable Model ◽  
Daily Gain ◽  
Estimation Of Genetic Parameters

Abstract. Title of the paper: Genetic association for daily gain (lifetime) in an crossbreeding program The aim of this investigation is an analysis of the crossing structure of a three-race crossing program and the genetic relations with respect to the trait average daily gain. For this purpose we examine the genetic relations for their usefulness for a estimation of genetic parameters and breeding values. Finally a parameter estimation is carried out. The data basis consists of 1757 German Large White performances, 34980 Landrace performances and 2775 Pietrain performances in pure breed as well as 92757 performances of the crossings of the mother lines and altogether 13854 Pietrain crossings (1997 PI x DL and 11857 PI x DEDL). The heritabilities for the variable daily gain are in the range from 0.17 to 0.31. The genetic correlations between the mother races and their crossbreedings are around 0.9. Between the pure Pietrain and the Pietrain crossings these values reach only 0.7. Within the two groups of crossings with Pietrains the genetic correlations are almost one. From the genetic point of view it is possible to put together the mother races and their crossings as well as the Pietrain crossings. Thus, for this trait it is sufficient to consider a three variable model with separate investigation of the mother races, the Pietrains and the Pietrain crossings.

Estimation of genetic parameters for litter traits in grasscutters (Thryonomys swinderianus)

2014 ◽  
Vol 54 (10) ◽  
pp. 1762
Author(s):  
A. J. Henry ◽  
S. N. Ibe ◽  
B. O. Asuquo
Keyword(s):  
Genetic Correlation ◽  
Positive Relationship ◽  
Genetic Parameters ◽  
Heritability Estimate ◽  
Thryonomys Swinderianus ◽  
Litter Weight ◽  
Unbalanced Design ◽  
Litter Traits ◽  
Estimation Of Genetic Parameters

A study was conducted to estimate genetic parameters for litter traits in grasscutters. Data were obtained using 209 progenies from an unbalanced design of 18 does nested under six bucks. Heritability values of 0.56 ± 0.21 and 0.22 ± 0.22 were obtained for litter weight at birth from dam component and both sire and dam components, respectively. For litter weight at weaning, the heritability estimate was 0.66 ± 0.22 using the dam component of variance. Genetic correlation between litter weight at birth and litter weight at weaning was 0.59 revealing a positive relationship between both traits.

scholarly journals Estimation of genetic parameters for farrowing traits in purebred Landrace and Large White pigs

2018 ◽  
Vol 90 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Shinichiro Ogawa ◽  
Ayane Konta ◽  
Makoto Kimata ◽  
Kazuo Ishii ◽  
Yoshinobu Uemoto ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Large White ◽  
Estimation Of Genetic Parameters
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