University of Khartoum

Phenotypic and Genetics Characterization of Three Baggara Zebu Cattle sub-types (Nyalawi, Rezeigi and Mesairi

Phenotypic and Genetics Characterization of Three Baggara Zebu Cattle sub-types (Nyalawi, Rezeigi and Mesairi

Show full item record

Title: Phenotypic and Genetics Characterization of Three Baggara Zebu Cattle sub-types (Nyalawi, Rezeigi and Mesairi
Author: Hamouda, Maha Musa Mohammed
Abstract: The objectives of this study were to investigate the phenotypic and genetic relationships of body conformation and the variations between and within Baggara zebu breed with its main three sub-types (Nyalawi, Rezeigi and Mesairi), the experiment was conducted at Animal Production Research Center at Helat Kuku, in the north eastern region of Khartoum state and DNA isolation and molecular analysis were carried out at the Molecular Biology Centre, Faculty of Medicine and the rest of the analysis was done on the Faculty of Medical Laboratory Science ALNeelain University, the animal ages of this study were according to incisor eruption between one to four years, they were selected randomly and they were fed normal concentrate and green fodder at lib, a measuring tape (cm) was used for all measurements of phenotypic characters and blood samples for molecular analysis were used, about 78 bulls (33 Nyalawi, 32 Rezeigi and 13 Measiri), body measurements including face length, ear length, horn length, neck length, hum height, hum circumference, withers height, height at hump tip, back height, back length , back length around hump, heart girth, heart girth around hump, body length, chest depth, barrel circumference, pelvic length and width, side length, dewlap length, dewlap width, tail length and body weight were taken from each animal. The data were analyzed using Statistical Package for Social Sciences (SPSS software), the mean and Standard error were 47.42±0.62, 21.03±0.37, 14.93±1.69, 35.08±0.9, 11.90±0.61, 25.61±1.05, 113.03±2.62, 121.19±1.65, 119.9±1.31, 71.24±2.39, 121.62±2.14, 139.39±7.42, 154.27±3.24, 123.89± 2.04, 53.27±0.78, 169.88±3.6, 27.57±0.45, 26.026±0.59, 102.46±1.17, 69.27±2.86, 19.6±1.81, 79.41± 1.51 in cm and 227.936±9.997 kg, respectively. Nyalawi sub-type was found to be high significantly (P<0.01), and superior over Rezeigi and Mesairi sub-types in body weight, the mean were 244.24±9.70, 222.00±15.58 and 217.31±10.09 kg, respectively. Heart girth and heart girth around hump were also significantly (P<0.01) greater for Nyalawi sub-type with mean values of 144.18 ±1.87 and 158.67 ±2.68 cm respectively, for Mesairi sub-types were 140.46±2.57and 153.54±3.46 cm respectively and Rezeigi sub-types 135.35±2.97, 150.61±3.58cm, respectively. From the result Nyalawi and Mesairi sub-types were superior in barrel circumference than Rezeigi sub-types, mean and standard error were 172.36±2.98 and 173.15±3.91 cm, respectively and for Rezeigi sub-type barrel circumference was 164.13±3.90cm. Determination of regression coefficient (R2) in Baggara zebu breed (Nyalawi, Mesairi and Rezeigi sub-types) were 0.71, 0.74 and 0.10, respectively. Correlation coefficients of heart girth, body measurements of the three sub-types of Baggara zebu beef cattle (Nyalawi, Mesairi and Rezeigi) were 0. 84, 0.86 and 0. 31, respectively, the correlation coefficient of height at withers, height at back and body weight were highly significant (P<0.01) on Mesairi and Rezeigi sub-types but it was not significant (P>0.05) in Nyalawi sub-types. However, the correlation coefficients of chest depth was highly significant (P<0.01) in Rezeigi and Nyalawi sub-types, but the same correlation in Mesairi sub-types was not significant (P>0.05).The second part of the study was molecular analysis, about sixty one blood samples of each animal (25 Nyalawi, 13 Mesairi, 23 Rezeigi sub-types) were collected from the jugular vein in vacutainer tubes, containing EDTA as anticoagulant and held at 4°C pending laboratory analysis for DNA extraction and molecular marker RAPD-PCR method, three primers were selected randomly, two of them were actively worked, the level of polymorphism among the three sub-types of Baggara zebu breed were 56.85%, and the level of polymorphism among the two sub-types of Baggara zebu breed (Nyalawi and Rezeigi) were 71.43%, but Mesairi sub-type was failed on the test by RAPD-PCR method. In conclusion, the results of linear body measurements of the phenotypic traits for the three sub-types of Baggara zebu breed showed more differences. Molecular variation between the two types Nyalawi and Rezeigi, this variation could be used for selection and breeding strategies in Baggara zebu breed, especially Nyalawi sub-type; However, genetic variation between the three sub-types of Baggara breed needs further investigation.
Description: 151 Pages
URI: http://khartoumspace.uofk.edu/123456789/27118


Files in this item

Files Size Format View

This item appears in the following Collection(s)

Show full item record

Share

Search DSpace


Browse

My Account