Genetic and phenotypic parameters for birth and weaning weights of purebred and crossbred Ndama and West African Shorthorn cattle

Ahunu, B.K.; Arthur, P. F.; Kissiedu, H.W.A.

doi:10.1016/s0301-6226(97)00064-x

Cited by 16 publications

(7 citation statements)

References 11 publications

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“…1986) and models used for the analysis (Mohiuddin 1993), the estimates obtained in this study are consistent with those reported by Ronningen et al. (1972) for BWT of Boran cattle in Kenya and Ahunu et al. (1997) for BWT and WWT in Ghana.…”

Section: Resultssupporting

confidence: 90%

“…Estimates of variance components, direct heritabilities (h 2 ), maternal heritabilities (m 2 ) and permanent environmental maternal effect (c 2 ) are presented in Table 3. Estimates of h 2 for crosses ranged from Although estimates of h 2 values reported vary based on differences in type of records analysed (Wright et al 1987), method of estimation (Nelsen et al 1986) and models used for the analysis (Mohiuddin 1993), the estimates obtained in this study are consistent with those reported by Ronningen et al (1972) for BWT of Boran cattle in Kenya and Ahunu et al (1997) for BWT and WWT in Ghana.…”

Section: Heritabilitysupporting

confidence: 86%

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Genetic evaluation of Ethiopian Boran cattle and their crosses with Holstein Friesian for growth performance in central Ethiopia

Haile

Joshi

Ayalew³

et al. 2010

Journal of Animal Breeding and Genetics

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Breed additive and non-additive effects, and heritabilities of birth weight (BWT), weaning weight (WWT), 6 months weight (SMWT), yearling weight (YWT), eighteen months weight (EWT), 2 years weight (TWT) and average daily weight gain from birth to 6 months (ADG1) and from 6 months to 2 years (ADG2) were estimated in Ethiopian Boran (B) cattle and their crosses with Holstein Friesian (F) in central Ethiopia. The data analysed were spread over 15 years. Ethiopian Boran were consistently lighter (p < 0.01) than the B-F crosses at all ages. Ethiopian Boran also gained lower weight than all the crosses. At birth, 50% F crosses were significantly (p < 0.01) lighter than all the other crosses. However, the differences in SMWT, YWT, EWT, TWT, ADG1 and ADG2 were all non-significant among the crosses. The individual additive breed differences between B and F breeds were positive and significant (p < 0.01) for all traits. The individual heterosis effects were significant (p < 0.05) for all traits except WWT for which the effect was non-significant. The maternal heterosis effects were significant (p < 0.01) for BWT (2.5 kg) and WWT (-3.0 kg). The heritability estimates for all traits in B and crosses were generally moderate to high indicating that there is scope for genetic improvement through selection. Selection within B and crossbreeding should be the strategy to enhance the growth performance under such production systems.

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Section: Resultssupporting

confidence: 90%

Section: Heritabilitysupporting

confidence: 86%

Genetic evaluation of Ethiopian Boran cattle and their crosses with Holstein Friesian for growth performance in central Ethiopia

Haile

Joshi

Ayalew³

et al. 2010

Journal of Animal Breeding and Genetics

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“…The results of the present study are more or less in agreement with the reports in the tropics (Rege, 1991;Demeke et al, 2004;Haile et al, 2009). Genetic correlations were greater than the phenotypic correlations for most of the traits and these were in agreement with reports of many other works (Rege, 1991;Koots et al, 1994, Ahunu et al, 1997Lobo et al, 2000). The high genetic correlation among first lactation traits is an indication that, the traits could be improved simultaneously in selection programs.…”

Section: Genetic and Phenotypic Correlationssupporting

confidence: 94%

1Adami Tullu Agricultural Research Center, P. O. Box 35, Ziway, Ethiopia. 2School of Animal and Range Sciences, College of Agriculture, Hawassa University, P. O. Box 5, Hawass Ethiopia.

Belay¹,

Chakravarty²

2013

J. Cell Anim. Biol.

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“…The higher h 2 a estimates than h 2 m estimates suggest that the direct heritability is a more pronounced genetic parameter for BW in the two breeds studied. Ahunu et al (1997) found h 2 m to be unimportant for BW in purebred and crossbred Ndama and West African Shorthorn cattle.…”

Section: Single-trait Analysismentioning

confidence: 87%

Genetic analyses for growth traits of two indigenous beef cattle breeds in Botswana

Raphaka

Dzama

2010

Livestock Science

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Genetic and phenotypic parameters for birth and weaning weights of purebred and crossbred Ndama and West African Shorthorn cattle

Cited by 16 publications

References 11 publications

Genetic evaluation of Ethiopian Boran cattle and their crosses with Holstein Friesian for growth performance in central Ethiopia

Genetic evaluation of Ethiopian Boran cattle and their crosses with Holstein Friesian for growth performance in central Ethiopia

1Adami Tullu Agricultural Research Center, P. O. Box 35, Ziway, Ethiopia. 2School of Animal and Range Sciences, College of Agriculture, Hawassa University, P. O. Box 5, Hawass Ethiopia.

Genetic analyses for growth traits of two indigenous beef cattle breeds in Botswana

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