Genetic Analysis of Growth Rates of Nellore Brown Sheep

Reddy, D. Vishnu Vardhan; Gnanaprakash, D. Sreenivas M.; Harikrishna, Ch.

doi:10.20546/ijcmas.2017.603.098

Cited by 7 publications

(4 citation statements)

References 5 publications

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“…Sex of lambs was reported to influence body weight lambs during their growth. Other studies showed similar results [12][13][14][15]. These results highlight the role of testosterone, which is known to influence body weight and growth in male lambs.…”

Section: Discussionsupporting

confidence: 79%

Evaluation of Weight and Growth Rates of Awassi Sheep Lambs

Al-Moman,

Ata,

Al-Najjar

2020

AJRAVS

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This study was conducted at Al-Fjaj station using of 2262 records to evaluate some non-genetic factors affecting Awassi lambs body weight and growth rate in Jordan. Data were analyzed by SAS program using General Linear Model (GLM). Least Square Means of body weight at birth (BW), at weaning -60 days (W60), at the age of 180 days (W180) and yearling age (W360), were 4.43±0.04, 18.07±0.21, 35.96±0.35, 59.71±0.94 kg, respectively. Growth rates from birth to weaning (GR1), from weaning to 180 days of age (GR2) and from 180 days to yearling age (GR3), were 0.216±0.03, 0.141±0.03, 0.131±0.002 (kg/day), respectively. All studied traits were significantly affected (p<0.01) by year of production (YP) and interaction between birth type (BT) and (YP). Sex of lamb (SL) had a highly significant effect (p<0.01) on BW, W60 and GR1. The BW, W60 and GR2 were significantly affected (p<0.01) by (BT) and also W180 and GR2 were significantly affected by (BT) and age of ewe (AE), respectively. The results of the present study suggested that lamb body weight and growth rate could be increased by improved management of Awassi lambs under rearing condition in Jordan.

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Section: Discussionsupporting

confidence: 79%

Evaluation of Weight and Growth Rates of Awassi Sheep Lambs

Al-Moman,

Ata,

Al-Najjar

2020

AJRAVS

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“…Chakraborty et al (2015) reported non-significant effect on BWT but significant effect on WWT and YW in Dorper crossbred sheep. Reddy et al (2017) reported significant effect on BW, 9BW and YW in Nellore brown sheep. On the contrary, Das et al (2014) reported non-significant effect of year of lambing on BW, WW and GFW in Kashmir Merino sheep.…”

mentioning

confidence: 85%

“…Chakraborty et al (2015) reported non-significant effect on BWT but significant effect on BWT and WWT and non-significant effect of sex on YW in Dorper crossbred sheep. Reddy et al (2017) reported significant effect of sex on BW, 9BW and YW in Nellore brown sheep.…”

mentioning

confidence: 88%

Factors affecting performance traits in Rambouillet sheep

SUDAN

Taggar

Chakraborty

et al. 2018

Indian J of Anim Sci

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“…et al (2016) in Harnali sheep, andReddy et al (2017) in Nellore brown sheep. The males gave higher estimates for all traits compared with females and this superiority of males was observed from 3 months of age to adult age Kumar et al (2022b).…”

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confidence: 95%

Influence of single nucleotide polymorphism in the IGF-1 gene on performance and conformation traits in Munjal sheep

Kumar

Dahiya

Magotra

et al. 2022

Zygote

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Summary Genetic polymorphism research in livestock species aims to assess genetic differences within and among breeds, primarily for conservation and development objectives. The aim of the present study was to determine the point mutation in the IGF-1 gene (g.855G>C and g.857G>A) and its association with performance traits in Munjal sheep. In total, 50 Munjal sheep were selected and the genomic DNA was isolated using the Automated Maxell RSC DNA/RNA purification system and the Maxwell RSC whole blood DNA kit. A reported set of primers was used to amplify the 294-bp fragment encompassing the targeted region, i.e. the 5′ flanking region of the IGF-1 gene. The polymerase chain reaction product of 294-bp size harbouring the g.857G>A mutation in the 5′ flanking region of the IGF-1 gene was digested with HaeII enzyme. Three possible genotypes were defined by distinct banding patterns, i.e. GG (194, 100 bp), GA (294, 194, 100 bp) and AA (294 bp) in the studied population of Munjal sheep. The genotypic and allelic frequencies of g.857G>A single nucleotide polymorphism of the IGF-1 gene indicated that the frequency of the A allele was higher in the studied population, i.e. 0.59 and the GA genotype was found to be the predominant genotype (0.66). Allele A of the IGF-1 gene was found to be associated with higher body weights and can be used in selection criteria for improving the performance of Munjal sheep. The positive effect of the IGF-1 gene on several conformational traits as observed in this study suggests that this area of the ovine IGF-I gene is particularly important and warrants further investigation on a larger population size.

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Genetic Analysis of Growth Rates of Nellore Brown Sheep

Cited by 7 publications

References 5 publications

Evaluation of Weight and Growth Rates of Awassi Sheep Lambs

Evaluation of Weight and Growth Rates of Awassi Sheep Lambs

Factors affecting performance traits in Rambouillet sheep

Influence of single nucleotide polymorphism in the IGF-1 gene on performance and conformation traits in Munjal sheep

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