Geographical assessment of body measurements and qualitative traits in West African cattle

2015 ◽  
Vol 47 (8) ◽  
pp. 1505-1513 ◽  
Author(s):  
Amadou Traoré ◽  
Delphin Oloronto Koudandé ◽  
Iván Fernández ◽  
Albert Soudré ◽  
Víctor Granda ◽  
...  
Keyword(s):  
West African ◽  
Body Measurements ◽  
Qualitative Traits ◽  
African Cattle

scholarly journals Multivariate characterization of morphological traits in West African cattle sires

2016 ◽  
Vol 59 (3) ◽  
pp. 337-344 ◽  
Author(s):  
Amadou Traoré ◽  
Delphin O. Koudandé ◽  
Iván Fernández ◽  
Albert Soudré ◽  
Isabel Álvarez ◽  
...  
Keyword(s):  
Cattle Breed ◽  
Principal Component ◽  
West African ◽  
The Body ◽  
Body Measurements ◽  
Qualitative Traits ◽  
Cattle Breeds ◽  
African Cattle ◽  
Type Traits

Abstract. A total of 183 adult sires belonging to nine West African cattle breeds sampled in 67 villages of Mali, Burkina Faso and Benin were assessed for 16 body measurements and 18 qualitative traits. Within type of cattle (zebu, sanga or taurine), the different breeds analysed showed large differences in body measurements. In general, taurine breeds had lower average values than the zebu breeds while sanga cattle tended to have intermediate values. Principal component analysis identified three factors characterising body measurements. Factor 1 summarised the information provided by those traits characterising the size of the individuals and explained 59.0 % of the variability. Factor 2 tended to gather information characterising the body width and explained 8.0 % of the variation. Less representative, Factor 3 (6.6 % of the variability) had no clear interpretation. Qualitative traits did not allow to distinguish among either cattle groups or breeds. Two Correspondence Analysis Dimensions computed on qualitative traits (explaining 26.2 and 15.5 % of the variability, respectively) did not allow to differentiate between zebu, sanga or taurine cattle breeds. Our results confirm that, in the framework of a general appearance, body measurements are the main criteria for differentiating West African cattle breeds. Furthermore, the current research has not allowed to identify breeding preferences on qualitative type traits in West African cattle sires. Therefore, homogenisation of the appearance of individuals within cattle breed is not expected.

scholarly journals Morphological assessment of the Zebu Bororo (Wodaabé) cattle of Niger in the West African zebu framework

2017 ◽  
Vol 60 (4) ◽  
pp. 363-371
Author(s):  
M. Maaouia A. Moussa ◽  
Moumouni Issa ◽  
Amadou Traoré ◽  
Moustapha Grema ◽  
Marichatou Hamani ◽  
...  
Keyword(s):  
Burkina Faso ◽  
Principal Component ◽  
West African ◽  
The Body ◽  
The Other ◽  
Zebu Cattle ◽  
Body Measurements ◽  
Mean Values ◽  
Qualitative Traits ◽  
Clear Differentiation

Abstract. A total of 357 adult cows and 29 sires belonging to the long-horned Niger Zebu Bororo cattle population were assessed for 13 body measurements and 11 qualitative traits. Data were jointly analysed with 311 cows and 64 sires belonging to other four West African zebu cattle populations, sampled in Burkina Faso and Benin, representative of both the short-horned and the long-horned West African zebu groups using multivariate statistical methods. Besides the other long-horned zebu breed analysed (Zebu Mbororo of Burkina Faso), Zebu Bororo cattle tended to have the highest mean values for all body measurements. Mahalanobis distance matrices further informed that pairs involving Zebu Bororo cattle had the higher differentiation of the dataset. However, contour plots constructed using eigenvalues computed via principal component analysis (PCA) illustrated a lack of differentiation among West African zebu cattle populations at the body measurements level. Correspondence analysis carried out on the 11 qualitative traits recorded allowed for ascertaining a clear differentiation between the Zebu Bororo and the other zebu cattle populations analysed which, in turn, did not show a clear differentiation at the qualitative type traits level. In our data, Zebu Bororo cattle had in high frequency qualitative features such as dropped ears, lyre-shaped horns and red-pied coat colour that are not frequently present in the other West African zebu populations analysed. A directional selection due to a rough consensus of the stock-keepers may be hypothesised. Performance of further analyses to assess the degree in which such breeding differences may be related to genetic or production differences are advised.

scholarly journals Population Structure Assessed Using Microsatellite and SNP Data: An Empirical Comparison in West African Cattle

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 151
Author(s):  
Isabel Álvarez ◽  
Iván Fernández ◽  
Amadou Traoré ◽  
Nuria A. Menéndez-Arias ◽  
Félix Goyache
Keyword(s):  
Population Structure ◽  
Correlation Coefficients ◽  
Principal Component ◽  
West African ◽  
Clustering Methods ◽  
African Cattle ◽  
Snp Data ◽  
Taurine Cattle ◽  
Geographical Maps ◽  
N’Dama Cattle

A sample of 185 West African cattle belonging to nine different taurine, sanga, and zebu populations was typed using a set of 33 microsatellites and the BovineHD BeadChip of Illumina. The information provided by each type of marker was summarized via clustering methods and principal component analyses (PCA). The aim was to assess differences in performance between both marker types for the identification of population structure and the projection of genetic variability on geographical maps. In general, both microsatellites and Single Nucleotide Polymorphism (SNP) allowed us to differentiate taurine cattle from zebu and sanga cattle, which, in turn, would form a single population. Pearson and Spearman correlation coefficients computed among the admixture coefficients (fitting K = 2) and the eigenvectors corresponding to the first two factors identified using PCA on both microsatellite and SNP data were statistically significant (most of them having p < 0.0001) and high. However, SNP data allowed for a better fine-scale identification of population structure within taurine cattle: Lagunaire cattle from Benin were separated from two different N’Dama cattle samples. Furthermore, when clustering analyses assumed the existence of two parental populations only (K = 2), the SNPs could differentiate a different genetic background in Lagunaire and N’Dama cattle. Although the two N’Dama cattle populations had very different breeding histories, the microsatellite set could not separate the two N’Dama cattle populations. Classic bidimensional dispersion plots constructed using factors identified via PCA gave different shapes for microsatellites and SNPs: plots constructed using microsatellite polymorphism would suggest the existence of weakly differentiated, highly intermingled, subpopulations. However, the projection of the factors identified on synthetic maps gave comparable images. This would suggest that results on population structuring must be interpreted with caution. The geographic projection of genetic variation on synthetic maps avoids interpretations that go beyond the results obtained, particularly when previous information on the analyzed populations is scant. Factors influencing the performance of the projection of genetic parameters on geographic maps, together with restrictions that may affect the election of a given type of markers, are discussed.

Incidence of bovine leukemia virus-specific antibodies in west african cattle

1986 ◽  
Vol 37 (4) ◽  
pp. 619-621 ◽  
Author(s):  
Francoise Walrand ◽  
Francis Fumoux ◽  
Georges Roelants ◽  
André-Laurent Parodi ◽  
Daniel Levy
Keyword(s):  
Bovine Leukemia Virus ◽  
Leukemia Virus ◽  
West African ◽  
Specific Antibodies ◽  
African Cattle

scholarly journals Age- and sex-dependent regression parameters for estimating live weight frim body measurements of West African Dwarf sheep

2021 ◽  
Vol 39 (1) ◽  
pp. 169-179
Author(s):  
O. S. Sowande ◽  
B. A Orebela ◽  
O. S Iyasere
Keyword(s):  
Body Size ◽  
Linear Regression ◽  
Regression Models ◽  
Live Weight ◽  
West African ◽  
The Body ◽  
Body Measurements ◽  
Age Group ◽  
Best Fit ◽  
Age And Sex

The relationships between live weight and eight body measurements of West African Dwarf (WAD) sheep were studied using 300 animals under farm condition. The animals were categorized based on age and sex. Data obtained on height at withers (HW), heart girth (HG), body length (BL), head length (HL), length of hindquarter (LHQ), width of hindquarter (WHQ), head width(HDW), and loin girth (LG) were fitted into simple linear (change in body measurement is directly proportional to weight or body size), allometric (body measurements do not necessarily change in direct proportion to weight or body size), and multiple linear regression models to predict live weight from the body measurements according to age group and sex. Results showed that live weight and body measurements of ewe were higher than that of the ram. Live weight, HG, HW, WHQ, LG, BL, LHQ, HL, and HW increased with the age of the animals. In multiple linear regression model, WHQ, LHQ, HW, HL and HDW best fit the model for sheep aged ≤1; HG, LG, BL and HDW for 2 year-old sheep; HG, BL, and HL best fit the model for sheep 3 years age group; LHQ best fit the model for sheep of 4 years of age; while HL best fits sheep that were in 5 year age category. Coefficients of determination (R2) values for linear and allometric models for predicting the live weight of WAD sheep increased with age in all the body measurements (HW, HG, BL, HL, LHQ, WHQ, HDW and LG). Sex had significant influence on the model with R2 values consistently higher in females except the models for LHQ, WHQ, LG and BL were they the same with the males. Based on R2 values, it was concluded that both linear and allometric regression models could be used to predict live weight from body measurements of WAD sheep.   

scholarly journals Zoometrical index analysis of Nigerian indigenous goat populations

2020 ◽  
Vol 44 (2) ◽  
pp. 18-24
Author(s):  
M. A. Popoola ◽  
A. O. Adekanbi
Keyword(s):  
Morphological Traits ◽  
West African ◽  
Body Measurements ◽  
West African Dwarf ◽  
Index Analysis ◽  
Indigenous Goat ◽  
Indigenous Goats ◽  
Functional Indices ◽  
Meat Type

The study was conducted to assess the zoometrical index analyses of Nigerian indigenous breeds of goats. The sampled populations of goat included 100 from each of three populations of goat in Nigeria; Red Sokoto, West African dwarf (WAD) and Sahel to give a total of 300 animals. .Nine body measurements were taken on these goats, which were used to estimate the ethnological indices and functional indices (as the zoometrical index) of the animals. There was significant effects (p<0.05) of breeds on morphological traits of these animals. The functional and ethnological traits of these goat populations were significantly affected by breeds (p<0.05) except pelvic and corporal. Based on the results of this study, Nigerian indigenous goats are medium-sized and their conformation corresponds to the meat type animals.

scholarly journals The effects of genotype and week of lactation on milk yield, udder dimensions and linear body measurements of non-dairy ewes

2021 ◽  
Vol 38 (2) ◽  
pp. 9-17
Author(s):  
O. O. Adewumi ◽  
C. A. Chineke ◽  
J. A. Alokan ◽  
I. J. James ◽  
O. A. Akinola
Keyword(s):  
Milk Yield ◽  
Tail Length ◽  
West African ◽  
Head Width ◽  
Body Measurements ◽  
Leg Length ◽  
West African Dwarf ◽  
Face Length ◽  
Daily Milk Yield ◽  
Linear Body

One hundred and ninety two records were taken weekly for twenty four (24) weeks from West African Dwarf (WD), the Yankasa (YN) and the West African Dwarf X Yankasa crossbred (XB) sheep. The traits evaluated were milk yield (MK), linear body measurements (LB) such as height at withers, (HT), body length (BL), heart girth (HG), shoulder width (SW), Tail length (TA), Neck length (NL), Neck circumference (NC), Face length (FA), Hind leg length (HL), Foreleg length (FL), Face length (FA), Ear length (EA), Head width (HW) and Rump height (RH) together with the following Udder dimensions (UD): Udder circumference (UC), Teat length (TL) and Teat circumference (TC). There was significant (P<0.05) influence of genotype on MK, WHT, HT, BL, TA, FL, HL, FA, EA and RH. The WD ewes produced more milk than either the YN or XB enes. Average daily milk yield (ml) was 122.25, 90.88 ana 108.8. The YN genotype was superior in all LBs except SW and NC than the WD and XB in the three genotypes. Height at withers was 59.08, 69.21 and 61.81 cm; BL 48.54, 55.08 and 54.49 cm and RH 62.88, 75.11 and 68.46 cm for WD, YN and XB enes respectively. Since milk offtake is related to body weight and some linear body measurements, selection for WT, HG, SW, NL NC, UC and TL in WD ewes could lead to higher milk and mutton production.  

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