Effect of leptin genetic polymorphism on lameness prevalence in Tunisian Holstein cows

Ferchichi, Mohamed Amine; Jemmali, B.; Amiri, Sihem; Gara, A. Ben; Rekik, B.

doi:10.5194/aab-61-305-2018

Cited by 8 publications

(9 citation statements)

References 20 publications

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“…Considering other similar studies, the allele frequencies reported in the studies by Pomp et al (1997), Rasor et al (2002), Javanmard et al (2004), Leifers et al (2002, Javanmard et al (2005), Javanmard et al (2010), Kulig et al (2010), Öztabak et al (2010), Aytekin, (2011), Al-Janabi et al (2018), Ferchichi et al (2018, Maletic et al (2019), Kiyici et al (2019;Fernandes et al (2020) were similar to the allele frequencies in our study. According to the Hardy-Weinberg genetic equilibrium test performed for both breeds, LEP/Sau3AI gene polymorphism was in equilibrium in the Brown Swiss breed (X 2 =2.44; P>0.05), while it was not in equilibrium in the Simmental breed (X 2 =4.67; P<0.05).…”

Section: Resultssupporting

confidence: 90%

The Relationship Between Leptin Gene Polymorphism and Milk Yield Traits in Simmental and Brown Swiss Cattle

Atalay

Özdemir

2022

Turkish JAF Sci.Tech.

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This study was performed to determine the genotype and allele frequencies and the association between the leptin gene Sau3AI polymorphism and some performance traits in Simmental (n=60) and Brown Swiss (n=62) cattle in the province of Erzurum, Türkiye. Considering the allele frequencies in the population, the frequency of the A allele was 0.87 and the frequency of the B allele was 0.13 in Simmental cattle, and the frequency of the A allele was 0.94 and the frequency of the B allele was 0.06 in Brown Swiss cattle. According to the analysis conducted in the Simmental breed, the general averages were found to be 5422.4 ± 1901.74 kg for actual milk yield, 5626.6 ± 1475.85 kg for 305-day milk yield, 298.7 ± 84.80 days for lactation duration, and 18.5 ± 4.84 kg for daily milk yield. As a result of the analysis in the Brown Swiss breed, the general averages were 3917.8 ± 1584.38 kg for actual milk yield, 4614.3 ± 982.62 kg for 305-day milk yield, 254.9 ± 99.88 days for lactation duration, and 16.0 ± 3.82 kg for daily milk yield. According to the statistical analysis results, the impact of genotype on milk yield traits was insignificant in Simmental and Brown Swiss cattle.

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Section: Resultssupporting

confidence: 90%

The Relationship Between Leptin Gene Polymorphism and Milk Yield Traits in Simmental and Brown Swiss Cattle

Atalay

Özdemir

2022

Turkish JAF Sci.Tech.

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“…Logistic regression was used to identify the explanatory facteurs, from there cited above, of fertility rate and conception rate (Ferchichi, Jemmali, Amiri, Ben Gara, & Rekik, 2018). These dependant variables were considered as binary response, and the 5% level of significance was considered.…”

Section: Methodsmentioning

confidence: 99%

Effects of heat stress on reproductive efficiency in Holstein dairy cattle in the North African arid region

Djelailia

Bouraoui

Jemmali

et al. 2020

Reprod Domestic Animals

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This work aims to study the relationship between variations of the Temperature‐Humidity Index (THI) and the parameters of reproduction especially the first conception rate (FCR) and to determine the threshold THI value where cows’ fertility rate dropped in 12 Holstein dairy herds raised in the arid climatic conditions of Tunisia. THI values were calculated over 22 years (1996–2018), and the mean monthly temperature and relative humidity data were obtained from the Meteorological Institute of Tunisia. A total of 20,396 individual records (Insemination and calving dates) were extracted from the Livestock and Pasturing Office (OEP, Tunisia) with regard to the highest THI before breeding, on the breeding day, and after breeding. Statistical analysis was performed using the GLM procedure of SAS software. Results point to the fact that a summer heat stress exists in southeast Tunisia and lasts for 4 months starting from June until September with THI values fluctuating between 73 ± 2.38 and 79 ± 3.01 exceeding, therefore, THI threshold of 72. Increased THI from ≤70 to ≥80 units was associated with drops in conception rate (CR) and fertility rate (FR) of 49% and 45% giving a correlation with the THI of (r = −.72, p < .05) and (r = −.74, p < .05), respectively. When cows were inseminated on extremely hot days (THI ≥ 80) preceded by cooler temperatures, pregnancy by service (P/AI) was 7% points higher than for other cows that were exposed to high temperatures before breeding. The average number of insemination was higher (p < .05) from THI ≤ 70 (2.01) compared to THI ≥ 80 (3.41). Cows calving during an absence of heat stress (THI ≤ 70) have the shortest average calving intervals (CI: 420 ± 15.1 days). Contrastly, calving in the condition of heat stress (THI ≥ 80) has the longest CI (487 ± 12.8 days). For each point increase in the THI value above 67, there is a decrease in the first conception rate by 1.39%. In this particular arid environment, high‐yielding Holstein cows’ breeding success is strongly affected by heat stress that takes place just before or after breeding.

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“…In a study in Turkey, Guzel et al (2012) determined serum leptin levels in Brown Swiss (2.35±0.34 ng/ml), Holstein bulls (3.55±0.53 ng/ml), Avesi sheep (2.16±0.29 ng/ml), saanen (2.23±0.46 ng/ml) and hair goats (0.94±0.10ng/ml) by the radio immune assay (RIA) method. In the early 2000s, studies investigating leptin levels serologically were more common, but in the following years more genetic studies began to gain importance (Ferchichi et al, 2018;Kaplan, 2018;Abbas et al, 2019;Avondo et al, 2019;Das et al,2019;Ibrahim et al, 2020;Mahrous et al, 2020;Sedykh et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Determination of serum Leptin levels in cattle, sheep, goats and buffaloes in Burdur province in Türkiye by ELISA method

KARAAYVAZ

KIYICI

Öztürk

et al. 2022

Cumhuriyet Üniversitesi Sağlık Bilimleri Enstitüsü Dergisi

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Leptin is a hormone that provides the central and/or peripheral regulation of food intake, energy expenditure, whole body energy balance, fertility and immune functions by creating a feeling of satiety in animals and humans. This study was carried out to determine serum leptin values for some ruminant species and breeds that were healthy and had at least one birth. In the study, 15 Simental and 15 Holstein cows, 15 Italian buffalo, 15 Pırlak sheep, 15 Honamlı and 15 Turkish hair goats were used as material. Serum leptin concentrations were measured with the BT LAB Bovine Leptin ELISA kit. Serum leptin levels were determined as 2.78±0.22 ng/ml in Simmental cows, 2.87±0.11 ng/ml in Holstein cows, 3.6±0.48 ng/ml in Pırlak sheep, 3.38±0.76 ng/ml in Honamlı goats, 5.48±0.92 ng/ml in Hair goats and 2.50±0.17 ng/ml in Italian buffaloes. As a result, it was determined that serum leptin levels obtained from different ruminant species that were healthy and gave at least one birth in Burdur province were within the reference values reported for ruminants.

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Effect of leptin genetic polymorphism on lameness prevalence in Tunisian Holstein cows

Cited by 8 publications

References 20 publications

The Relationship Between Leptin Gene Polymorphism and Milk Yield Traits in Simmental and Brown Swiss Cattle

The Relationship Between Leptin Gene Polymorphism and Milk Yield Traits in Simmental and Brown Swiss Cattle

Effects of heat stress on reproductive efficiency in Holstein dairy cattle in the North African arid region

Determination of serum Leptin levels in cattle, sheep, goats and buffaloes in Burdur province in Türkiye by ELISA method

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