Evaluation of models for estimation of genetic parameters and maternal effects for early growth traits of Iranian Baluchi sheep

Abbasi, Mokhtar-Ali; Abdollahi-Arpanahi, Rostam; Maghsoudi, Ali; Torshizi, R Vaez; Nejati‐Javaremi, A.

doi:10.1016/j.smallrumres.2011.10.003

Cited by 49 publications

(47 citation statements)

References 25 publications

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“…Singles had higher values than twin values (3.68±0.01 against 2.88±0.05, 20.46± 0.10 against 17.70±0.04, 26.84±0.14 against 23.16±0.67, 35.85±0.31 against 33.74±1.12 and 2.22±0.04 against 2.04±0.14 for BWT, 3MWT, 6MWT, 12MWT and GFY, respectively) ( Table 2). This is in agreement with the results of Mousa et al (2013) in Farafara sheep, Abbasi et al (2012) in Iranian Baluchi sheep, Roshanfekr et al (2011) in Arabi lambs and Petrovic et al (2011) …”

Section: Effect Of Type Of Birth At Lambingsupporting

confidence: 93%

“…The trend of the increase in BWT (3.43±0.04kg) and 3MWT (19.79±0.28kg) of the lambs is being observed up to the period when the age of their corresponding dams is 4-5 years. Similar results were obtained by Mousa et al (2013) in Farfara, Abbasi et al (2012) in Iranian Balichi, Petrovic et al (2011) in Svrljig and Roshanfekr et al (2011) in Arabi lambs. Due to ewes' body development, limited uterine space, inadequate availability of nutrients during pregnancy, enhancement of milk quality and quantity and improvement in maternal ability of the ewes with age, it is expected that litters born in the first parity would have significantly lower weight than those of later parities.…”

Section: In Indigenoussupporting

confidence: 85%

“…Similar results of significant effect on sex of the lamb on BWT and 3MWT were reported by Chopra et al (2010) in Bharat Merino and Dass et al (2014) The results pertaining to heavier weight of the male lambs in comparison to the female lambs were also reported in Iranian Baluchi sheep (Abbasi et al, 2012), indigenous Serbian breeds of sheep (Petrovic et al, 2011) and Farafra lambs (Roshanfekr et al, 2011). This is mainly due to the physiological differences between the two genders and male and female endocrine system that males are always heavier and grew faster than female as reported in many studies by Mousa et al (2010).…”

Section: Effect Of Sex Of the Lambsupporting

confidence: 83%

“…Estimate of heritability for BWT in the current study was higher than those obtained by Matika et al (2003) for Turkish Merino sheep (0.25), Mousa. et al, 2013for native Farafra sheep (0.25), Parkash et al (2012 for Malpura sheep (0.21) Rashidi et al (2008) for Kermani sheep (0.04) and Abbasi et al (2012) for Iranian Baluchi sheep (0.12). However, h 2 estimate for BWT was lower than those reported by El-Awady et al (2011) and Miraei et al (2007) which were 0.40 for Rahmani lambs and 0.33 for Sangsari sheep, respectively.…”

Section: In Indigenousmentioning

confidence: 99%

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Influence of genetic and non genetic factors on growth traits of Bharat Merino sheep in sub-temperate climate of Kodai hills of Tamil Nadu, India

Mallick

Pourouchottamane

Rajapandi

et al. 2016

IJAR

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In the present study, the data on 1649 Bharat Merino (BM) lambs; progeny of 144 sires over the year from 2000 to 2014 available at Southern Regional Research Centre (SRRC), Central Sheep and Wool Research Institute, Mannavanur were considered for the analysis. The different economic growth traits used for the analysis were birth weight (BWT), weaning weight (3MWT), 6 month weight (6MWT), 12 month weight (12MWT) and greasy fleece yield (GFY). The overall leastsquare means for weights (in kg) were 3.28±0.02, 19.08±0.23, 25.00±0.35, 34.79±0.59 and 2.13±0.07 for BWT, 3MWT, 6MWT, 12MWT and GFY respectively. Different non genetic factors such as year, sex, type of birth and dam's age had significant (P<0.01) influence on BWT and 3MWT. Season influenced the BWT (P<0.05) while it had no significant effect on 3MWT. Six month weight was also significantly (P<0.05) influenced by all non-genetic factors taken under present study. Twelve month weight was significantly affected by year (P<0.01), sex and season (P<0.05). Similarly, analysis of variance showed that the year, sex of the lambs (P<0.01) and season (P<0.05) were important sources of variation on GFY of Bharat Merino sheep. Lambs born single had higher values of BWT and 3MWT than that of the lambs born as twins. The trend of the increase in BWT and 3MWT of the lambs is being observed up to the period when the age of their corresponding dams is 4-5 years. The findings of the present study showed that non -genetic factors play an important role in the expression of genetic potential in the lambs as well as growth performance of Bharat Merino sheep under sub temperate conditions of Kodai hills of Tamil Nadu, India. The genetic parameters estimated of 6MWT indicate that it is most suitable for use as selection criterion. Improvement of body weight of BM sheep seems feasible in selection programs, as some of the related traits are moderately heritable and those traits specially are well correlated, which could suggest that these traits are useful in selection programs.

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Section: Effect Of Type Of Birth At Lambingsupporting

confidence: 93%

Section: In Indigenoussupporting

confidence: 85%

Section: Effect Of Sex Of the Lambsupporting

confidence: 83%

Section: In Indigenousmentioning

confidence: 99%

See 2 more Smart Citations

Influence of genetic and non genetic factors on growth traits of Bharat Merino sheep in sub-temperate climate of Kodai hills of Tamil Nadu, India

Mallick

Pourouchottamane

Rajapandi

et al. 2016

IJAR

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show abstract

“…Sheep are efficient converters of unutilized poor quality grass and crop residues into meat and skin. In small ruminants, fast growth rate ultimately determines their meat producing capability up to marketing age and therefore, affects economic success of producing system (Abbasi et al, 2012). With the rising prices of mutton in the market, fast growing and heavier lambs in great demand (Narula et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Genetic Analysis of Growth Rates of Nellore Brown Sheep

Reddy¹,

Gnanaprakash²,

Harikrishna³

2017

Int.J.Curr.Microbiol.App.Sci

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Direct and maternal variance components and genetic parameters for average daily body weight gain and Kleiber ratios in Nellore sheep

Illa

Gollamoori

Nath

2018

Trop Anim Health Prod

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The objective of the present study was to estimate variance components and genetic parameters for average daily gain from birth to weaning (ADGa), birth to 6 months (ADGb) and 3 to 6 months (ADGc) and corresponding Kleiber ratios (Ka, Kb, and Kc) in Nellore sheep. Data were collected from the records maintained at Livestock Research Station, Palamaner, for analysis and the data spread from 1993 to 2016 (23 years). Lambing year, sex of lamb, season of lambing, and parity of dam were included in the model as fixed effects, and ewe weight was kept as a covariate. Six animal models were fitted with various combinations of direct and maternal genetic effects using restricted maximum likelihood procedure. The Akaike's information criterion was employed to determine the best model for each trait. Direct heritability estimates obtained in the study for ADGa, ADGb, ADGc, Ka, Kb, and Kc were 0.37, 0.41, 0.34, 0.48, 0.46, and 0.37, respectively, and their corresponding maternal heritabilities ranged from 0.11, 0.21, 0.11, 0.24, 0.22, and 0.11, respectively. (Co)variance among the direct and maternal effects were found to be negative in all the traits. Direct genetic correlations among the studied traits were positive with few exceptions, and they ranged from - 0.03 (Ka-Kc) to 0.99 (ADGa-Ka); similarly, the phenotypic correlations ranged from low to high - 0.18 (ADGa-Kc and Ka-Kc) to 0.95 (ADGa-Ka). These results indicated the importance of maternal effects in affecting the growth rate and efficiency of feed utilization traits and also suggested the possibility of moderate genetic progress for these traits through selection.

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Evaluation of models for estimation of genetic parameters and maternal effects for early growth traits of Iranian Baluchi sheep

Cited by 49 publications

References 25 publications

Influence of genetic and non genetic factors on growth traits of Bharat Merino sheep in sub-temperate climate of Kodai hills of Tamil Nadu, India

Influence of genetic and non genetic factors on growth traits of Bharat Merino sheep in sub-temperate climate of Kodai hills of Tamil Nadu, India

Genetic Analysis of Growth Rates of Nellore Brown Sheep

Direct and maternal variance components and genetic parameters for average daily body weight gain and Kleiber ratios in Nellore sheep

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