Heritability and variance components estimates for growth traits in Saudi Ardi goat and Damascus goat and their crosses

Mohammed, K. M.; El-den, M. Kamal; Dahmoush, A. Y.

doi:10.4103/2305-0500.220984

Cited by 7 publications

(10 citation statements)

References 3 publications

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“…Our results are more or less consistent with estimates published in the literature. For example, our BW h 2 estimate is within the range (0.09 to 0.47) reported by several authors from BW measured between birth and yearling age in different goat breeds [23][24][25][26]. However, it is higher than the one reported by [27][28][29].…”

Section: Discussionsupporting

confidence: 82%

Genetic Parameters for Growth and Kid Survival of Indigenous Goat under Smallholding System of Burundi

Manirakiza

Hatungumukama

Detilleux

2020

Animals

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The goal of this study was to estimate genetic parameters for the growth, conformation, and survival of goat kids raised in smallholder farming systems in Burundi. To do this, measurements were taken on live weight, thoracic perimeter, length, and height at birth (n = 1538 animals), at 3 months (n = 1270 animals), at 6 months (n = 992 animals), at 9 months (n = 787 animals), and at 12 months (n = 705 animals). Kids were born between 2016 and 2019, from 645 dams and 106 bucks. Three bivariate animal models were used to estimate genetic parameters of body weight and conformation measurements as potential indicators of this weight. According to the measure, heritability was estimated between 15 and 17% and genetic correlations between 65 and 79%. An accelerated failure time animal model was used to estimate the heritability of survival for kids under one year, adjusted for birth weight. Goat survival was significantly prolonged by 0.64 days per kilogram of birth weight. The estimated heritability for this trait was 2%. Overall, these results suggest that a selection program could be implemented to improve animal growth, either directly on weight or indirectly on conformational traits. At the same time, efforts need to be made to improve rearing conditions to increase the survival of kids.

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Section: Discussionsupporting

confidence: 82%

Genetic Parameters for Growth and Kid Survival of Indigenous Goat under Smallholding System of Burundi

Manirakiza

Hatungumukama

Detilleux

2020

Animals

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“…The current unadjusted means of BW, W30, W60 and WW were, 1.733, 5.309, 8.229 and 11.087 kg, respectively ( Table 1). The present results were in general close up with those reported by Aboul-Naga et al 2012and El-Moghazy et al (2015) for the same flock on another set of data and lower than those reflected by Tesema et al (2017) in Central Highland x Boer crossbred goats and Mohammed et al (2018) in Saudi Ardi goat breed and Damascus goat breed and their crosses for different live body weights from birth until weaning of kids. Those differences may be due to the variations in gene combinations related to growth rates between breeds.…”

Section: Resultssupporting

confidence: 92%

“…Genetic parameters Direct heritability (h 2 d ) for BW, W30, W60 and WW were moderate 0.25, 0.22, 0.31 and 0.35, respectively ( Table 2). The current estimates of (h 2 d ) were higher than those reviewed by Sadegh et al (2013) in Iranian Adani goats for BW and WW were 0.23 and 0.18, respectively, Mohammed et al (2018) in Saudi Ardi goat x Damascus goat for BW was 0.15 and Al-Saef (2013) in Damascus goats were 0.19 and 0.12, respectively. ); maternal permanent environmental variance (σ 2 pe ); residual variance (σ 2 e ); direct-maternal genetic covariance (σ dm ); phenotypic variance (σ 2 p ); correlation between direct and maternal genetic (r dm ); direct heritability (h 2 d ); maternal heritability (h 2 m ); total heritability (h 2 t ); repeatability (r)…”

Section: Resultscontrasting

confidence: 56%

Desired Gain Selection Indices for Pre-Weaning Body Weights in Zaraibi Male Kids in Egypt

El-Naser¹

2020

Journal of Animal, Poultry & Fish Production

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The aim of the current study was to estimate the genetic parameters and evaluate various desired-gain selection indices for pre-weaning live body weights of Zaraibi male kids in Egypt. From 2005 to 2012, data of 763 does mated with 75 bucks of Zaraibi goats raised at El-Serw Experimental Station belonging to the Animal Production Research Institute were collected. Data were analyzed with REML using animal model to determine genetic parameters and using SAS to construct different desired-gain selection indices. Direct heritability (h 2 d) for BW, W30, W60 and WW were 0.25, 0.22, 0.31 and 0.35, respectively. Corresponding maternal heritability (h 2 m) for aforementioned traits were 0.145, 0.141, 0.099 and 0.073, respectively. While total heritability (h 2 t) above traits were 0.25, 0.38, 0.48, 0.49 and 0.34, respectively. The direct-maternal genetic correlations (r dm) were positive for W30 (0.35) and W60 (0.47), while negative for BW (-0.23) and WW (-0.19). Genetic correlations (r d1d2) among studies traits ranged from 0.80 to 0.95, while phenotypic correlations (r p1p2) among all traits ranged from 0.69 to 0.84. Comprisable between selection indices was the highest number of generations required (T) to attain the pre-estimated goals was 5.6143 in I 4. In contrast, the lowest number of generations required (T) was 2.0220 in I 14. Therefore, I 14 was considered the best selection index lead to save time and efforts for genetic improvement of studied traits in Zaraibi male kids in Egypt.

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“…Animals in high growth potency will be more tolerant in less suitable environmental conditions compared to the low growth ones (Přibyl et al 2008). Some non-genetic factor had a significant effect on body weight at earlier ages such as sex, type of birth, seasons of birth, and year of birth (Bharathidhasan et al 2009;Mabrouk et al 2010;Caro-Petrovic et al 2012;Supakorn & Pralomkarn 2012;Kaunang et al 2013;Kugonza et al 2014;Dudhe et al 2015;Josiane et al 2020;Mohammed et al 2018). Male usually expressed higher body weight and body size than the female kid.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies reported the differences in birth weight and weaning weight of both sexes around 5.0-12.2% and 6.0-20.0% (Bharathidhasan et al 2009;Mabrouk et al 2010;Caro-Petrovic et al 2012;Supakorn & Pralomkarn 2012;Kugonza et al 2014;Josiane et al 2020). Whereas single birth kid usually expressed higher body weight and growth rate against twin and triplet kids (Bharathidhasan et al 2009;Mabrouk et al 2010, Supakorn & Pralomkarn 2012Dudhe et al 2015;Josiane et al 2020;Mohammed et al 2018). Interaction between kidding season and year of kidding can also affect the body weights and growth rate of a young goat (Bharathidhasan et al 2009;Supakorn & Pralomkarn 2012;Caro-Petrovic et al 2012;Dudhe et al 2015;Selvam 2018;Mohammed et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Non-Genetic and Genetic Effects on Growth Traits from Birth to 120 days of Age of G2 Sapera Goat

Anggraeni¹,

Saputra²,

Hafid³

et al. 2020

JITV

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Information on non-genetic and genetic factors is required in the selection program. Indonesian Research Institute for Animal Production (IRIAP) has been conducting a selection of the growth traits of Sapera goat (50% Saanen, 50% PE). This research was aimed to study non-genetic and genetic effects on growth traits from birth to the age of 120 days old of the 2nd generation (G2) of Sapera goat. Data on body weight and measurement were collected from kids at birth (105 head.) to the age of 120 days old (51 head). The 30 days interval growth data were calculated by linear interpolation. Non-genetic effects were analyzed by General Linear Model for unbalanced data by considering sex, type of birth, the month of kidding, and year of kidding as fixed variables. The genetic component was analyzed by a mixed linear model by considering sire as a random variable. Heritability was estimated by the paternal half-sib method. Non-genetic factors mostly had no significant effect (P> 0.05) on body weight and measurement. The 90 days old and 120 days old males had higher weights than females (P<0.05). Birth type and year of kidding had significant effects (P<0.05) on body weight and some measurements at certain ages. No significant months of kidding effect on the growth traits (P>0.05). Heritability values of body weight (h2 = 0.11-0.19) and body sizes (h2 = 0.03-0.24) were relatively low. Except high heritability values for birth weight and for body weight at 30 days old (h2 = 0.59 and 0.29), and for hip girth at 30 days old and at 60 days old (h2 = 0.13-0.54). The growth traits of G2 Sapera kids were affected by sex and year of kidding and slightly influenced by genetic (sires) factors.

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Heritability and variance components estimates for growth traits in Saudi Ardi goat and Damascus goat and their crosses

Cited by 7 publications

References 3 publications

Genetic Parameters for Growth and Kid Survival of Indigenous Goat under Smallholding System of Burundi

Genetic Parameters for Growth and Kid Survival of Indigenous Goat under Smallholding System of Burundi

Desired Gain Selection Indices for Pre-Weaning Body Weights in Zaraibi Male Kids in Egypt

Non-Genetic and Genetic Effects on Growth Traits from Birth to 120 days of Age of G2 Sapera Goat

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