Genetic parameters of growth traits in Awassi sheep

Alkass, Jalal E.; Aziz, D.A.; Hermiz, H. N.

doi:10.9755/ejfa.v3i1.5299

Cited by 6 publications

(12 citation statements)

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“…The corresponding values of highest BLUP values were 0.225, 1.284, and 0.053 kg. The findings of the current research that sire had significant (P < 0.01) effect on BW is similar to those obtained by Al-Hilali (1982), and Alkass et al (1991). The parity affected the BW significantly (P < 0.01).…”

Section: Resultssupporting

confidence: 90%

“…Heritability estimates of 0.10, 0.19, 0.18, and 0.16 for BW of Awassi lambs were reported by Kazzal (1973), Thrift et al (1973), Aziz (1977), and Gursoy et al (1995). The higher estimates of 0.29 and 0.41 for the same breed were obtained by Al-Hilali (1982), and Alkass et al (1991). The heritability estimate of the BW in the present study indicated that sires differed in their genetic potential.…”

Section: Resultssupporting

confidence: 41%

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BLUP Values of Birth to Weaning Growth Traits of Awassi Lambs in Iraq

Al-Samarai¹

2015

Russian Journal of Biological Research

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This study was carried out on the research station of sheep and goat (Abo Gharib, west of Baghdad, Iraq) to investigate the effects of some environmental factors on some growth traits in Awassi lambs as well as estimating heritability of these traits. Records of Awassi lambs included 1318 birth weights (BW), 821 weaning weights (WW) and 821 pre-weaning daily gains (DG) as recorded over three years (2007)(2008)(2009). Records belonged to 120 sires. Restricted Maximum Likelihood (REML) method in a mixed model (paternal half sib) was utilized to estimate the heritability (h²) for above mentioned traits. The general statistical model included fixed effects due to parity, sex, year and month of birth, type of birth and age at weaning as covariate. The Best Linear Unbiased Prediction (BLUP) values of sires for all studied traits were estimated. Results showed that the means of BW, WW and DG were 3.85, 26.64 and 0.181 kg respectively. Studied traits were significantly (P < 0.01) affected by all fixed effects except the effect of sire on WW and DG, which was significant (P< 0.05). Heritability estimates (h²) of BW, WW and DG were 0.23, 0.12 and 0.19 respectively. The lowest and highest BLUP values for the mentioned traits were -0.325, 0.255 kg, -1.142, 1.284 kg, and -0.103, 0.053 kg respectively.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 41%

BLUP Values of Birth to Weaning Growth Traits of Awassi Lambs in Iraq

Al-Samarai¹

2015

Russian Journal of Biological Research

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“…BWT had a moderate genetic correlations (0.62) with WWT and ADWG whereas it was found to be unity (1.00) between the latter traits and was in agreement with the report earlier (24). However, (26) reported that genetic correlations of BWT were 0.11 and -0.05 with WWT and ADWG, respectively, and it was 0.03 between WWT and ADWG contradicting the finding (1.00) in this study and in (24) (0.99).…”

Section: Resultscontrasting

confidence: 99%

“…The heritability estimate for ADWG was found lower than those found in the other studies (24,26,29). BWT had a moderate genetic correlations (0.62) with WWT and ADWG whereas it was found to be unity (1.00) between the latter traits and was in agreement with the report earlier (24).…”

Section: Resultscontrasting

confidence: 81%

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Birth and weaning weights of Awassi lambs raised in the GAP International Agricultural Research and Training Center

VURAL

2015

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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Summary:In this study, the data were collected from 1271 heads of Awassi lambs raised in the GAP International Agricultural Research and Training Center in Diyarbakır, Turkey. Birth and weaning weight (at 90 days) of lambs were measured and average daily weight gain from birth to weaning was calculated. The effect of the years and season of lambing, age of dam, sex and birth type on birth weight (BWT), weaning weight (WWT) and average daily weight gain (ADWG) from birth to weaning were investigated. Overall means were 4.81±0.022 kg for BWT, 22.99±0.196

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Genetic Evaluation of Iraqi Awassi Rams According to Some Growth Traits of Their Progeny Lambs

Al-Samarai¹

2016

AJASR

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This study was carried out on the research station of sheep and goat (Abo Gharib, west of Baghdad, Iraq) to evaluate the 120 Awassi rams for the birth weight (BW), weight at weaning (WW) and pre-weaning daily gains (DG) of their lambs after adjusting to the effects of parity, year of birth, sex, and type of birth (single, twin). Restricted Maximum Likelihood (REML) method in a mixed model (paternal half sib) was utilized to estimate the heritability (h²) for above mentioned traits. Proc mixed in SAS program was used to estimate Best Linear Unbiased Prediction (BLUP) values of rams for the three studied traits. The results revealed that the means of BW, WW and DG were 3.85, 26.64 and 0.181kg respectively. The studied traits were significantly (P < 0.01) affected by all fixed effects except the effect of ram on WW and DG which was significant (P < 0.05). Heritability estimates (h²) of BW, WW and DG were 0.23, 0.12 and 0.19 respectively. The lowest and highest BLUP values for the mentioned traits were -0.325, 0.255 kg, -1.142, 1.284 kg, and -0.103, 0.053 kg respectively. In conclusion: the results indicated that selection of rams for DG and BW could play an important role for improving the growth traits of Awassi sheep due to the high range among BLUP values along with the acceptable estimations of heritability.

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Genetic parameters of growth traits in Awassi sheep

Cited by 6 publications

References 0 publications

BLUP Values of Birth to Weaning Growth Traits of Awassi Lambs in Iraq

BLUP Values of Birth to Weaning Growth Traits of Awassi Lambs in Iraq

Birth and weaning weights of Awassi lambs raised in the GAP International Agricultural Research and Training Center

Genetic Evaluation of Iraqi Awassi Rams According to Some Growth Traits of Their Progeny Lambs

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