Classifying camel breeds using geometric morphometrics: A case study in Kuwait

Alhajeri, Bader H.; Alaqeely, Randa; Alhaddad, Hasan

doi:10.1016/j.livsci.2019.103824

Cited by 17 publications

(10 citation statements)

References 46 publications

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“…Multivariate discriminant analyses of morphological traits have been reported, in several previous morphometric studies, to be effective for a precise and objective discrimination of different population of cattle [22][23][24][25][26][27][28], goat [29][30][31][32][33][34], sheep [16,[35][36][37], horses [38] and camel [39].…”

Section: Introductionmentioning

confidence: 99%

Use of multivariate analysis as a tool in the morphological characterization of the main indigenous bovine ecotypes in northeastern Algeria

et al. 2021

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Sustainability in livestock farming requires monitoring of autochthonous breeds which are well adapted to the local environment. The morphometric measurements seem to be the first approach which can provide useful information on the suitability of animal genetic resources for selection. In this work, thirteen morphometric variables were used for the phenotypic characterization of 130 adult autochthones cattle randomly selected from 30 local farms in Guelma. There were cases from four commonly accepted and traditional ecotypes: Guelmois, Cheurfa, Sétifien and Fawn. The results showed several and significant positive correlations between the different variables. Correlations were analyzed using Varimax orthogonal rotation PCA and three factors were extracted, which explain more than 75% of the total variation in the four ecotypes. Stepwise discriminant analysis showed that 6 of the 13 variables had discriminatory power to define the phenotypic profile of the ecotypes. Canonical discriminant analysis indicated that the Sétifien ecotype is separate from the other three ecotypes. Mahalanobis distances were significant between the different ecotypes except for the distance between the Guelmois and Fawn ecotypes. The cross-validation procedure assigned 91.42% of the Sétifien animals to their genetic group, while the percentages of animals assigned to the Cheurfa, Guelmois and Fawn ecotypes were 80.00%, 65.71% and 53.33% respectively. The multivariate approach has proven to be effective in differentiating the four ecotypes, with clear morphological differences from the Sétifien ecotype that may benefit from a genetic improvement program for more sustainable genetic resources preservation.

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Section: Introductionmentioning

confidence: 99%

Use of multivariate analysis as a tool in the morphological characterization of the main indigenous bovine ecotypes in northeastern Algeria

et al. 2021

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“…The mitochondrial relationships within the six Mezayen camel-types indicate that: (1) Majaheem camels are different from the rest of the Mezayen camel-types (i.e., Malaween), (2) Maghateer camels, which is a name given to different camel groups depending on their location and tribal ownership, appears to be more diverse than all other Mezayen types, and (3) Malaween camel-types are generally similar. These findings were supported by a study on dromedary camel torso using geometric morphometric methods (Alhajeri et al, 2019). The uniqueness of Majaheem camels, and its separation from the other Mezayen types agrees with the phenotypic differences that may prevent interbreeding and gene flow (Alhaddad and Alhajeri, 2019).…”

Section: Mezayen Dromedary Camel-typesmentioning

confidence: 55%

Mitochondrial Sequence Variation, Haplotype Diversity, and Relationships Among Dromedary Camel-Types

et al. 2021

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Dromedary camels are outstanding livestock that developed efficient abilities to tolerate desert conditions. Many dromedary camel-types (i.e., named populations) exist but lack defined specific breed standards, registries, and breeders’ governing organizations. The breed status of dromedary camel-types can partly be assessed by exploring mitochondrial DNA (mtDNA) variation. Accordingly, this study aimed to examine the breed status and the inter-population relationships of dromedary camel-types by analyzing sequence variation in the mtDNA control region and in three coding genes [cytochrome b, threonine, and proline tRNA, and part of the displacement loop (D-loop)] (867 bp region). Tail hair samples (n = 119) that represent six camel-types from Kuwait were collected, extracted, sequenced, and compared to other publicly available sequences (n = 853). Within the sequenced mitochondrial region, 48 polymorphic sites were identified that contributed to 82 unique haplotypes across 37 camel-types. Haplotype names and identities were updated to avoid previous discrepancies. When all sequences were combined (n = 972), a nucleotide diversity of 0.0026 and a haplotype diversity of 0.725 was observed across the dromedary-types. Two major haplogroups (A and B) were identified and the B1 haplotype was predominant and found in almost all dromedary-types whereas the A haplotypes were more abundant in African regions. Non-metric multidimensional scaling revealed an increased similarity among Arabian Peninsula “Mezayen” camel-types, despite their defining coat colors. The relationships among dromedary camel-types can partly be explained by mtDNA. Future work aimed at a deeper understanding of camel-type breed status should focus on a high number of nuclear markers.

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“…It is globally important to assess the level of phenotypic variation in camel populations. This paves the way for proper documentation of the available gene pools that will permit the selection of elite animals for the production of superior individuals ( Alhajeri et al, 2019 ; Ehsaninia et al, 2020 ; Atigui et al, 2021 ). Body weight (kg) and twenty linear body measurements (cm) of African camels varied among the different breeds/ecotypes, and between sexes.…”

Section: Quantitative Traitsmentioning

confidence: 99%

Exploiting morphobiometric and genomic variability of African indigenous camel populations-A review

et al. 2022

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Camels (Camelus dromedarius) in Africa are adapted to arid and the semi-arid environmental conditions, and are valuable for meat, milk and fiber production. On account of the growing demand for camels in this continent, there is a need for knowledge on their phenotypic and genetic diversity. This is fundamental to sustainable herd management and utilization including the design of appropriate breeding and conservation strategies. We reviewed studies on the phenotypic and genetic characterization, breeding objectives, systems of production, productive and reproductive performances, and pathways for the sustainable rearing and use of camels in Africa. The morphological and genetic diversity, productive and reproductive abilities of African camels suggest the existence of genetic variations that can be utilized for breeds/ecotypes’ genetic improvement and conservation. Possible areas of intervention include the establishment of open nucleus and community-based breeding schemes and utilization of modern reproductive technologies for the genetic improvement of milk and meat yields, sustainable management of rangelands, capacity building of the pastoralists and agro-pastoralists, institutional supports, formation of centralized conservation centres and efficient and effective marketing systems.

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Classifying camel breeds using geometric morphometrics: A case study in Kuwait

Cited by 17 publications

References 46 publications

Use of multivariate analysis as a tool in the morphological characterization of the main indigenous bovine ecotypes in northeastern Algeria

Use of multivariate analysis as a tool in the morphological characterization of the main indigenous bovine ecotypes in northeastern Algeria

Mitochondrial Sequence Variation, Haplotype Diversity, and Relationships Among Dromedary Camel-Types

Exploiting morphobiometric and genomic variability of African indigenous camel populations-A review

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