Comparative study of growth patterns of Kalahari Red goats and West African dwarf goats reared in Southwest Nigeria

2020 ◽  
Vol 47 (5) ◽  
pp. 213-226
Author(s):  
B. O. Omotosho ◽  
M. N. Bemji ◽  
K. Bamisile ◽  
M. O. Ozoje ◽  
M. Wheto ◽  
...  
Keyword(s):  
Growth Traits ◽  
Average Daily Gain ◽  
Growth Patterns ◽  
West African ◽  
Coefficient Of Determination ◽  
Parameter Estimates ◽  
Von Bertalanffy ◽  
West African Dwarf ◽  
Poids Corporel ◽  
Body Weights

This study focused on comparing growth traits (body weights at birth, 3-month weaning and 6-month post-weaning) as well as growth curves of Kalahari Red (KR), a newly introduced goat breed in Nigeria and West African Dwarf (WAD) goat semi-intensively managed. Data on growth traits and weekly live weights were collected from 124 kids consisting of 61 KR and 63 WAD goats. The data were subjected to least squares analysis of variance to evaluate the effects of breed, sex, season, birth type and parity. The results showed that KR kids exceeded WAD kids in body weights at birth (2.30±0.06 kg vs 1.56±0.06 kg), 3-month weaning (8.88±0.57 kg vs 3.88±0.20 kg) and 6-month post-weaning (13.97±0.86 kg vs 5.05±0.37 kg). Corresponding pre-weaning average daily gain (ADG) estimates were 84.44±2.44 g and 31.73±1.16 g and post-weaning ADG were 61.88±1.81g and 24.84±1.21 g. Growth patterns of the two breeds were described using four different non-linear models: Brody, Gompertz, Logistic and Von Bertalanffy. Models were compared using parameter estimates (asymptotic weight 'A', integration constant 'B' and rate of maturity 'k'). Model with good fit was adjudged using coefficient of determination (R2) and residual mean squares (RMS). The KR goats had higher parameter estimates than WAD goats. Von Bertalanffy model had the highest 'A' estimates (24.24±0.94 kg vs 11.99±0.54 kg for KR and WAD goats). Gompertz had highest 'B' and 'k' estimates (5.37±0.20 vs 3.38±0.09) and (0.19±0.01 vs 0.13±0.01) for KR and WAD goats. All four growth models generally had R2 exceeding 99% and low RMS, hence giving good fit to the observed growth data. They can be used to implement feeding and management decisions that will optimize productivity. Information on superior growth performance of the Kalahari Red goat can be utilized to further investigate genetic improvement of the indigenous West African Dwarf population through crossbreeding.     Cette étude s'est concentrée sur la comparaison des traits de croissance (poids corporel à la naissance, sevrage à 3 mois et 6 mois après le sevrage) ainsi que les courbes de croissance du Kalahari Red (KR), une race de chèvre nouvellement introduite au Nigéria et West AfricanDwarf (WAD) chèvre gérée de manière semi-intensive. Des données sur les traits de croissance et le poids vif hebdomadaire ont été collectées auprès de 124 chevreaux comprenant 61 chèvres KR et 63 chèvres WAD. Les données ont été soumises à une analyse des moindres carrés de la variance pour évaluer les effets de la race, du sexe, de la saison, du type de naissance et de la parité. Les résultats ont montré que les enfants KR dépassaient les enfants WAD en poids corporel à la naissance (2.30 ± 0.06 kg vs 1.56 ± 0.06 kg), au sevrage de 3 mois (8.88 ± 0.57 kg vs 3.88 ± 0.20 kg) et 6 mois après le sevrage (13.97 ± 0.86 kg contre 5.05 ± 0.37 kg). Les estimations correspondantes du gain quotidien moyen (ADG) présevrage étaient de 84.44 ± 2.44 g et 31.73 ± 1.16 g et l'ADG post-sevrage était de 61.88 ± 1.81 g et 24.84 ± 1.21 g. Les modèles de croissance des deux races ont été décrits à l'aide de quatre modèles non linéaires différents :Brody, Gompertz, Logistic et Von Bertalanffy. Les modèles ont été comparés à l'aide d'estimations de paramètres (poids asymptotique « A », constante d'intégration « B » et taux de maturité « k »). Le modèle avec un bon ajustement a été évalué en utilisant le coefficient de détermination (R2) et les carrés moyens résiduels (RMS). Les chèvres KR avaient des estimations de paramètres plus élevées que les chèvres WAD. Le modèle de Von Bertalanffy présentait les estimations « A » les plus élevées (24.24 ± 0.94 kg contre 11.99 ± 0.54 kg pour les chèvres KR et WAD). Gompertz avait les estimations « B » et « k » les plus élevées (5.37 ± 0.20 vs 3.38 ± 0.09) et (0.19 ± 0.01 vs 0.13 ± 0.01) pour les chèvres KR et WAD. Les quatre modèles de croissance avaient généralement un R2 supérieur à 99% et un RMS faible, ce qui correspondait bien aux données de croissance observées. Ils peuvent être utilisés pour mettre en œuvre des décisions d'alimentation et de gestion qui optimiseront la productivité. Les informations sur la performance de croissance supérieure de la chèvre rouge du Kalahari peuvent être utilisées pour étudier plus avant l'amélioration génétique de la population indigène de nains d'Afrique de l'Ouest par croisement.  

scholarly journals Growth curves on females of the Caracu breed

2016 ◽  
Vol 37 (4Supl1) ◽  
pp. 2749 ◽  
Author(s):  
Raphael Patrick Moreira ◽  
Maria Eugênia Zerlotti Mercadante ◽  
Victor Breno Pedrosa ◽  
Joslaine Noely dos Santos Gonçalves Cyrillo ◽  
Wignez Henrique
Keyword(s):  
Growth Traits ◽  
Nonlinear Models ◽  
Average Daily Gain ◽  
Growth Curves ◽  
Coefficient Of Determination ◽  
Von Bertalanffy ◽  
Mean Square ◽  
The Mean ◽  
Best Fit ◽  
Daily Gain

The objective of the study was to analyze nonlinear models that best fit the growth of Caracu cows. The experiment was conducted at the Instituto de Zootecnia, Centro APTA Bovinos de Corte, Sertãozinho, SP. Data of weight at birth to 63 months of age, from 500 females of the Caracu breed were used. The mean weight at birth (BW), weaning weight (W7), weight at 26 months (W26) and weight at 63 months (W63) were, respectively, 32 kg, 198 kg, 354 kg and 488 kg, providing an average daily gain (ADG) of 0.241 kg/day. The nonlinear models used were: Brody, Von Bertalanffy, Logistic and Gompertz. All of the models tended to describe accordingly the growth curve of these animals, but, according to the mean square residual and coefficient of determination adopted to select the most appropriate model, Brody showed the best fit. All models presented a high and negative correlation between the A and k parameters, indicating that the most precocious animals are less likely to reach elevated weights at 63 months of age. The effect of year of birth significantly affected (P < 0.01) the parameters A and k, concluding that the animal selection based on growth traits favored the increase of mature weight and growth precocity over the generations.

Characterization of growth traits of Greenland and Silver coypus under captivity conditions

2005 ◽  
Vol 143 (2-3) ◽  
pp. 199-207 ◽  
Author(s):  
C. FAVERIN ◽  
C. A. MEZZADRA ◽  
H. M. FERNÁNDEZ ◽  
L. M. MELUCCI
Keyword(s):  
Mixed Model ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Von Bertalanffy ◽  
Birth Season ◽  
Myocastor Coypus ◽  
Mean Values ◽  
Estimated Parameters ◽  
Maturation Rate ◽  
Almost All

Brody, Gompertz, Logistic, Richards and von Bertalanffy functions were compared as descriptors of growth in 319 coypus (Myocastor coypus) of Greenland and Silver varieties, from birth to 10–19 months of age. Several criteria were considered for the selection of the model: (a) bias in the asymptotic weight; (b) bias in birth weight; (c) error sum of squares; (d) error mean squares weighted by the number of animals converging in all functions; (e) determination coefficient. To adjust the curves NLIN procedure from SAS and iterative method of Marquardt were applied. A mixed model was used to analyse the parameters of the selected growth curve (asymptotic weight, A; constant of integration, B; and maturation rate, k) which included effects of farm, variety, sex, sire within farm and variety, reproductive status within sex, birth season and first order interactions. The effect of sire was considered as random. The von Bertalanffy function was selected and mean values for the parameters of this function were 8016 g and 0·008 g/g per day, for A and k respectively. There were differences in the estimated parameters between sexes; males had larger values of A and k than females.Weights at fixed ages (birth, weaning, 6–7 months) were analysed, as well as the final recorded weight and average postweaning gain. The model of analysis was similar to the previous one. There were no differences between varieties. Significant differences between sexes for almost all studied traits were detected. With age, weight difference between males and females increased. At 6 months of age, males were 37% heavier than females. Male average daily gain was higher than that of females, sexual dimorphism being evident in all analysed traits.

Genetic parameter estimates for early growth traits in Naeini goat

2012 ◽  
Vol 52 (11) ◽  
pp. 1046 ◽  
Author(s):  
Hasan Baneh ◽  
Mojtaba Najafi ◽  
Ghodrat Rahimi
Keyword(s):  
Environmental Effects ◽  
Variance Components ◽  
Genetic Parameters ◽  
Growth Traits ◽  
Genetic Parameter ◽  
Average Daily Gain ◽  
Parameter Estimates ◽  
Estimate Variance ◽  
Daily Gain ◽  
Birth Type

The present study was carried out to estimate variance components for growth traits in Naeini goats. Bodyweight records were collected for two flocks under supervision of the Agriculture Organisation of the Esfahan province between 2000 and 2007. Investigated traits were birthweight (BW; n = 2483), weaning weight (WW; n = 1211) and average daily gain from birth to weaning (ADG; n = 1211). Environmental effects were investigated using fixed-effect models, while (co)variance components and genetic parameters were estimated with single- and three-trait analyses using REML methods and WOMBAT software. Six different animal models were fitted to the traits, with the best model for each trait determined by log-likelihood ratio tests (LRT). All traits were significantly influenced by herd, birth year, sex of the kid, birth type and dam age (P < 0.01). On the basis of LRT, maternal permanent environmental effects (c2) were significant for WW and ADG, while BW was affected only by direct genetic effects. Direct heritability estimates for BW, WW and ADG were 0.25 ± 0.05, 0.07 ± 0.06 and 0.21 ± 0.11, respectively. The estimate of c2 was 0.16 ± 0.06 for both WW and ADG. Estimates of genetic correlation for BW–ADG, BW–WW and ADG–WW were 0.49, 0.61 and 0.94, respectively. The estimated phenotypic correlations were positive and were between 0.03 (BW–ADG) and 0.95 (ADG–WW). These results indicate that selection can be used to improve growth traits in this goat breed.

scholarly journals Performance of pure and crossbred progenies of Red Sokoto and West African Dwarf goats in the Rainforest Zone of South Eastern Nigeria.

2021 ◽  
Vol 39 (2) ◽  
pp. 41-48
Author(s):  
E. N. Nwachukwu ◽  
K. U. Amaefule ◽  
F. O. Ahamefule ◽  
S. C. Akomas ◽  
T. U. Nwabueze ◽  
...  
Keyword(s):  
Body Weight ◽  
Block Design ◽  
Average Daily Gain ◽  
West African ◽  
Genetic Group ◽  
Feed Conversion ◽  
Gross Margin ◽  
West African Dwarf ◽  
South Eastern ◽  
Rainforest Zone

This study is a report of part of a planned breeding programme to evaluate the performance of pure and crossbred progenies of Red Sokoto (RS) and West African Dwarf (WAD) goats in a rainforest zone of South Eastern Nigeria. A total of 56 kids produced by four breeding goat units consisting of pure Red Sokoto (RS x RS), pure West African Dwarf (WAD X WAD), main cross (RS x WAD), and reciprocal cross (WAD X RS) were used to investigate performance and cost benefit of producing progenies of these indigenous goats. The experimental design was a randomized complete block design with genetic group and sex as the factors of interest. Results showed that at birth, the male RS X RS kids weighed significantly (P<0.05) highest (1.84±0.23kg), followed by WAD X RS (1.43±0.14kg), RS X WAD (1.37±0.56kg) while the WAD X WAD kids had the lowest birth weight (1.15±0.39kg). However, the RS X WAD female kids, at birth weighed significantly highest (1.5±0.54kg), followed by the RS X RS (1.33±0.98kg), WAD X RS (1.31±0.17kg) and WAD X WAD (1.09±0.12kg).Body weight at 18 weeks was significantly higher for RS X RS (9.82±0.79kg) than the RS X WAD (8.34±0.85) which in turn was significantly higher than the WAD X RS (7.61±0.13kg) and WAD X WAD (7.51±0.61kg). The male and female kids of the RS X WAD had improved body weight and the linear body measurements namely, body length, height-at-withers and heart girth. This genetic group had a higher average daily gain (46.03 ± 1.41g/d) and better feed conversion ratio (5.38 ± 0.27) than the RS x WAD (6.64 ± 0.18) and WAD x WAD (7.02 ± 0.21). It also had the lowest cost of production (N953.40=$6.60) and as such the highest gross margin (N2,111.06 = $14.60) in 18 weeks. Individuals in this group appeared more promising hybrid goats for commercial meat goat production in the rainforest zone of South Eastern Nigeria.

scholarly journals Study on growth traits at weaning and yearling stages of indigenous and F1 crossbred buffalo in Bangladesh

2018 ◽  
Vol 3 (4) ◽  
pp. 499-503
Author(s):  
Md Shahjahan ◽  
Asma Khatun ◽  
Sumya Khatun ◽  
Md Mahbubul Hoque ◽  
Sohrab Hossain ◽  
...  
Keyword(s):  
Body Weight ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Breeding Period ◽  
Gain Measurement ◽  
Body Weights ◽  
Two Stages ◽  
Additive Genetic Effects ◽  
Daily Gain ◽  
Imported Semen

This study was planned to clarify the variation of body weight and average daily gain traits in both indigenous and F1 crossbreed (Local×Mediterranean) buffalo at weaning (sixth month) and yearling stages (twelfth month). Data were collected from 33 indigenous and 35 F1 crossbred buffalo progeny during the period of 2011 to 2014 with intensive management system at Research and Development farm of Lal Teer Livestock Limited in Bangladesh. The gathered data were analyzed using general linear model (GLM) and independent sample t test. The effect of parity, sex, season and breeding year on body weight and average daily gain were observed where significant values found in breeding period (p <0.01) of crossbred buffalo for body weight. It might be the reason of crossbreeding to indigenous buffalo cows using imported semen with better genetic merit. The parity (p <0.05), season (p <0.05) and breeding period (p <0.01) were also significant for average daily gain measurement which suggesting environmental adaptability beside additive genetic effects. Body weights were measured at weaning and yearling stages for both local (113 to 195 kg) and F1 crossbred (144 to 220 kg) buffalo progeny to screen the elite offspring for the Genetic Farm and Bull station. Similarly, average daily gain observed 469 to 457 g and 600 to 506 g at the previously mentioned two stages for both local and F1 buffalos, respectively. It was observed that studied traits were comparatively better in F1 buffalo progeny than indigenous. The comparison of average daily weight gains between indigenous and F1 buffalos at weaning and yearling periods showed significant differences for body weight (p <0.001) and average daily gain (p <0.05), respectively. It is concluded that genetic gain might be possible in local buffalo population by grading up process which could switch the traditional buffalo rearing to commercial level as well as meeting the nutritional demand of country people.Asian J. Med. Biol. Res. December 2017, 3(4): 499-503

Influence of creep diet on blood profile of West African dwarf lambs raised in humid tropical environment

2020 ◽  
Vol 45 (2) ◽  
pp. 363-370
Author(s):  
C. A. Ebuzor ◽  
F. O. Ahamefule ◽  
O. I. Prudent ◽  
L. E. Okoye ◽  
A. L. Nzotta ◽  
...  
Keyword(s):  
Post Partum ◽  
West African ◽  
Tropical Environment ◽  
Blood Profile ◽  
West African Dwarf ◽  
Blood Biochemical ◽  
Body Weights ◽  
Biochemical Indices ◽  
Blood Biochemical Indices ◽  
Normal Health

A 70-day feeding trial was carried out to determine the influence of creep diets onhaematological and biochemical blood profile of West African dwarf lambs maintained in a humid tropical environment. Nine lambs at 6 weeks of age were completely randomized into three equal groups and each subsequently subjected to one of three nutritional regimens from 6 to 16 weeks post-partum (point of weaning). Lambs in group 1 (control) suckled their dams only (diet A). Groups 2 and 3 lambs, were in addition to suckling, given supplementary rations formulated to contain 10.0% Soya bean and groundnut cakes (diets B and C) in concentrate mix, respectively. Animals in supplemented groups were offered concentrate diets at 3% of their body weights throughout the trial. Except for MCH, PCV and MCHC, there were no significant differences (P>0.05) in values of other haematological parameters measured. AST and creatinine values were however similar (P>0.05), but significant differences (P<0.05) existed in values of other blood biochemical indices measured. Results of this study showed that creep feeding of lambs stabilizes haematological and biochemical blood profile which is indicative of normal health and nutritional status of the animals.

Growth performance, genetic parameters and selection index of pure and crossbred populations of Red Sokoto and West African Dwarf goats

2020 ◽  
Vol 42 (1) ◽  
pp. 11-18
Author(s):  
E. N. Nwachukwu ◽  
O. C. Nkemakolam ◽  
A. I. Adeolu
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Growth Traits ◽  
Selection Index ◽  
Genetic Correlations ◽  
Pure Line ◽  
West African ◽  
Male And Female ◽  
West African Dwarf ◽  
Indigenous Goat

In 2008, a breeding programme was designed to develop hybrid goat suitable for the rainforest agro-ecological zone of South-Eastern, Nigeria. Two indigenous goat breeds namely, Red Sokoto (RS) and West African Dwarf (WAD) goats were utilized and mated in a main (RS x WAD), reciprocal (WAD x RS) and pure line (RS x RS and WAD x WAD) fashion. A total of 74 progenies were generated from the matings and were evaluated for 12week growth performance. As part of the ranking procedure, a selection index was constructed based on two major body components namely body weight (BWT) and heart girth (HGT) to objectively determine the genetic worth of the growing pure and crossbred progenies of Red Sokoto and West African Dwarf kids. The results showed that average body weight (BWT) of RS x RS (5.29±0.13kg) and RS x WAD (5.14±0.21kg) buck kids were similar but significantly (P< 0.05) heavier than that of their WAD x RS (4.84 + 0.17kg) and WAD x WAD (4.79 + 0.17kg) counterparts. The performance of crossbred RS x WAD compared to WAD x RS and WAD x WAD buck kids indicate that the main crossbred kids sired by Red Sokoto bucks but nursed by WAD dams received superior sets of genes from their large-sized sire. The RS x WAD buck kids in particular, had significantly longer body length (BLT), height-at-withers (HWT) and HGT than WAD x RS and WAD x WAD kids. The phenotypic and genetic correlations of BWT and HGT in both sexes for the different genotypes were high and positive which were indicative of the nature of association between these conformation traits in goats. Heritability estimates (h2) for BWT and HGT in males and females kids ranged from 0.31 – 0.36 versus 0.28 – 0.30, respectively in most of the growing kids. The relative economic values (REV) of chosen traits were generally higher for male kids compared to their female counterparts. Phenotypic variances for BWT and HGT in male and female kids ranged from 0.65 – 0.80. The selection index values were highest in male and female kids of RS x RS, followed by RS x WAD, while WAD x RS kids ranked low and WAD x WAD kids ranked the least. Thus, indicating that selection and improvement of growth traits in these pure and crossbred kids would be in favour of the RS x RS and RS x WAD individuals.

Live weight changes during lactation and its relationship with milk off-take and yield in West African Dwarf and Red Sokoto goats intensively managed within the humid zone of Nigeria

2021 ◽  
Vol 33 (1) ◽  
pp. 145-150
Author(s):  
M. N. Bemji ◽  
O. A. Osinowo ◽  
M. O. Ozoje ◽  
A. M. Adebambo ◽  
A. B. J. Aina
Keyword(s):  
Milk Yield ◽  
Weight Change ◽  
Live Weight ◽  
West African ◽  
Weight Changes ◽  
Humid Zone ◽  
West African Dwarf ◽  
Body Weights ◽  
Intensively Managed ◽  
Year 2000

This study focused on changes in doe live weight during lactation in West African dwarf (WAD) and Red Sokoto (RS) goats intensively managed within the humid zone of South-western Nigeria. The data analysed was based on 202 weekly records. from  17 lactations of 8 WAD and 9 RS goats from year 2000-2002. Mean live weight for RS does (21.16+0.34 kg) was higher (P<0.001) than the estimate (18.15+0.34 kg) for WAD does. Live weight decreased (P>0.05) from parturition up to fourth week and increased (P> 0.05) thereafter till the 12th week of lactation. There was no significant interaction between breed and week of lactation. Cumulative mean weight changes of 0.16+4119 kg for WAD and 0.38+0.22 kg for RS were not significantly different, Does had higher (P<0.001) body weights during the late- wet and early-dry seasons than during late-thy and early-wet seasons.. Live weight increased .significantly (P<0.001) with parity of doe, the trend being maintained with regards to cumulative weight change. Does that suckled male kids were less superior in body weights. This was reflected by a negative cumulative weight change. Live weight was positively con-elated with milk yield (rp = 0.24; P<0.05,4 estimated at 270.61+13.48 ml and 281.98+ 13. 17 ml respectively for RS and WAD goats (P>0.05). Corresponding values for milk off-take were (.14.09+3.64 and 16,45+3.56 ml; P>0.05), Milk off-take was lowly correlated with live weight (rp= 0_06; P>0.05) while its relationship with milk yield was positive and significant (rp= 0.40: P<0.001).

scholarly journals AN ANALYSIS OF PREWEANING BODY WEIGHTS IN WEST AFRICAN DWARF GOATS AND THEIR CROSSES

2021 ◽  
Vol 22 (2) ◽  
pp. 125-129
Author(s):  
M. O. Ebozoje ◽  
L. O Ngere ◽  
I. C Nwosu
Keyword(s):  
Production Efficiency ◽  
West African ◽  
Average Weight ◽  
West African Dwarf ◽  
First Order ◽  
West African Dwarf Goats ◽  
Body Weights ◽  
Daily Gain ◽  
Dwarf Goats ◽  
Birth Type

preweaning performance  record  of  seventy six West African dwarf (WAD) and WADX Red Sokoto (RS) half-bred kids were compared for production efficiency. Average weight at birth was 1.31±0.01kg for WAD kids and 1.44 ±0.01kg for haltbreds. At 90 days and 150 days of age, WAD kids weighed 4.87 :0.04 and 5.88±0.04kg respectively, while the Red Sokoto halfbred weighed 6.06±0.05kg at 90 days and 7.02±0.04kg at 150 days respectively. On the average, pre-weaning daily gain was 303Wday for the WAD kids and 37g/day for half bred kids between birth and 150 days of age. Genotype (P<0.01) and sex (P < 0.05) significantly affected weights at birth, 90 days and 150 days of age. Birth type (P< 0.01) significantly affected weights only at birth. However, season of birth and all first order interactions did not affect weights at any age.

scholarly journals Morphological characteristics of goat breeds in Nigeria using discriminant analysis approach

2021 ◽  
Vol 48 (5) ◽  
pp. 30-40
Author(s):  
E. A. Rotimi ◽  
A. M. Aliyu ◽  
A. Aruwayo
Keyword(s):  
Body Weight ◽  
Discriminant Analysis ◽  
Morphological Characteristics ◽  
West African ◽  
The Body ◽  
West African Dwarf ◽  
West African Dwarf Goats ◽  
Poids Corporel ◽  
Split Sample ◽  
Dwarf Goats

Information on morphological characteristics is a prerequisite to sustainable breed classification and conservation for proper management and utilization. The present study aimed to identify morphological characteristics that best classify the Sahel, Sokoto Red and West African Dwarf goats of Nigeria. A total of 584 goats of both sexes; Sahel (N = 163), Sokoto Red (N = 171) and West African Dwarf (N = 250) were randomly sampled and used for this study. The body parameters measured included body weight (BWT), height at wither (HW), body length (BL), paunch girth (PG), heart girth (HG) and ear length (EL). Multivariate technique of discriminant analysis procedure of SPSS 20.0 statistical package was used to classify the Sahel, Sokoto Red and West African Dwarf goats into their original breed. Accuracy of the classification was checked using cross-validation (leave-one-out, jack-knife or split-sample) procedure. Results showed that the mean body weight (kg) of Sokoto Red was significantly (P<0.05) higher than those of Sahel and West African Dwarf goats (23.596, 17.117 and 14.800 respectively). Highest correlation values were recorded between body weight and height at withers (0.777) in Sahel, body weight and paunch girth (0.707) in Sokoto Red and body weight and heart girth (0.797) in West African Dwarf goats. The discriminant analysis on body weight and the linear body measurements revealed that paunch girth and height at withers were the most discriminating variables and clearly separated and classified the three goat breeds into their breeds of origin. The discriminant function obtained correctly classified 99.0% of individuals from the sample of known goat populations. The classification accuracy of the function was cross-validated using the split sample method, and indicated a 99.0% success rate (97.5%, 100.0% and 99.2% of Sahel, Sokoto Red and West African Dwarf goats respectively). It was concluded that there was a clear separation between Barcha and Atlas goats. It was concluded that discriminant tool may be used successfully in the field to classify Sahel, Sokoto Red and West African Dwarf in the field, however there is need to complement this with molecular characterization using DNA marker for better conservation and improvement programme of indigenous goat genetic resources.   L'information sur les caractéristiques morphologiques est une condition préalable à la classification et à la conservation durables des races pour une gestion et une utilisation appropriées. Cet étude visait à identifier les caractéristiques morphologiques qui classent le mieux les chèvres sahéliennes, rouges de Sokoto et naines d'Afrique de l'Ouest du Nigeria. Un total de 584 chèvres des deux sexes ; Sahel (N = 163), Sokoto Red (N = 171) et West African Dwarf (N = 250) ont été échantillonnés au hasard et utilisés pour cette étude. Les paramètres corporels mesurés comprenaient le poids corporel (PC), la hauteur au garrot (HG), lalongueur du corps (BL), la circonférence de la panse (CP), la circonférence du cœur (CC) et la longueur des oreilles (LO). La technique multivariée de la procédure d'analyse discriminante du progiciel statistique SPSS 20.0 a été utilisée pour classer les chèvres sahéliennes, rouges de Sokoto et naines d'Afrique de l'Ouest dans leur race d'origine. L'exactitude de la classification a été vérifiée à l'aide d'une procédure de validation croisée (en laisser un, un couteau ou un échantillon divisé). Les résultats ont montré que le poids corporel moyen (kg) de Sokoto Red était significativement (P<0,05) supérieur à celui des chèvres naines du Sahel et d'Afrique de l'Ouest (23,596, 17,117 et 14,800 respectivement). Les valeurs de corrélation les plus élevées ont été enregistrées entre le poids corporel et la hauteur au garrot (0,777) au Sahel, le poids corporel et la circonférence de la panse (0,707) chez le Sokoto Red et le poids corporel et la circonférence cardiaque (0,797) chez les chèvres naines d'Afrique de l'Ouest. L'analyse discriminante sur le poids corporel et les mesures corporelles linéaires ont révélé que la circonférence de la panse et la hauteur au garrot étaient les variables les plus discriminantes et ont clairement séparé et classé les trois races caprines dans leurs races d'origine. La fonction discriminante obtenue a correctement classé 99,0 % des individus de l'échantillon de populations caprines connues. La précision de la classification de la fonction a été contre-validée à l'aide de la méthode de l'échantillon divisé et a indiqué un taux de réussite de 99,0 % (respectivement 97,5 %, 100,0 % et 99,2 % des chèvres sahéliennes, rouges de Sokoto et naines d'Afrique de l'Ouest). Il a été conclu qu'il y avait une nette séparation entre les chèvres Barcha et Atlas. Il a été conclu que l'outil discriminant peut être utilisé avec succès sur le terrain pour classer le Sahel, le rouge de Sokoto et le nain d'Afrique de l'Ouest sur le terrain, mais il est nécessaire de le compléter par une caractérisation moléculaire à l'aide d'un marqueur ADN pour une meilleure conservation et un programme d'amélioration de la génétique caprine indigène. Ressources.

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