Estimation of genetic and environment trend for birth weight and weaning weight in Najdi calves

Dezfuli, Bahareh Taheri; Sofla, Sima Savar; Mashayekhi, ‪Mohammadreza

doi:10.1017/s2040470010004553

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2018

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“…The least-squares mean for birth weight of Jersey crossbred calves in this study was 23.64±0.22 kg (Table 2) and this value was well comparable with the other studies in different cattle breeds (Dezfuli and Mashayekhi 2009, Singh et al 2010, Abera et al 2012. In this study, birth periods of calves significantly (P<0.01) affected the birth weight of calves but no definite pattern of birth weight of calves was observed over the years.…”

supporting

confidence: 91%

Genetic parameters for direct and maternal effects on birth weight of crossbred calves

Mandal¹,

BEHERA²,

Ratwan³

et al. 2018

Indian J of Anim Sci

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supporting

confidence: 91%

Genetic parameters for direct and maternal effects on birth weight of crossbred calves

Mandal¹,

BEHERA²,

Ratwan³

et al. 2018

Indian J of Anim Sci

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“…Tilki et al (2008) also reported a positive correlation Brown Swiss calves. However, Dezfuli and Mashayekhi (2009) were not able to report any positive correlations.…”

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confidence: 66%

Variance components due to direct and maternal effects for birth weight of Brown Swiss cattle

Soydan

2018

IJAR

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This study was conducted to estimate variance components and genetic parameters for birth weights of Brown Swiss calves. Experimental data were gathered from the records of a State Farm of Turkey (Konuklar) covering the years between 1995 and 2005. Random effects considered in this study included direct and maternal additive genetic effects, maternal permanent environmental effects with direct-maternal genetic covariance and random residual effects. AI-REML algorithm of WOMBAT software was used to estimate variance and covariance components, genetic parameters and breeding values. The general mean for birth weights of all calves was calculated as 38.12±0.006 kg. The least square for mean birth weights was calculated as 38.99±0.007 kg for male calves and as 37.26±0.008 for female calves. Direct heritability (hD2), maternal heritability (hM2), total heritability (hT2), rAM and cAM estimates were respectively calculated as 0.15, 0.10, 0.39, 0.96 and 0.13

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Estimation of genetic and environment trend for birth weight and weaning weight in Najdi calves

Cited by 2 publications

References 0 publications

Genetic parameters for direct and maternal effects on birth weight of crossbred calves

Genetic parameters for direct and maternal effects on birth weight of crossbred calves

Variance components due to direct and maternal effects for birth weight of Brown Swiss cattle

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