Genetic and morphological characterisation of the Ankole Longhorn cattle in the African Great Lakes region

Ndumu, Deo Birungi; Baumung, Roswitha; Hanotte, Olivier; Wurzinger, María; Okeyo, M; Han, Jin‐Hee; Kibogo, H.; Sölkner, Johann

doi:10.1051/gse:2008014

Cited by 14 publications

(16 citation statements)

References 26 publications

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“…This may be related to varying sensitivity of the two distance estimates, although both methods were able to separate the southern WAD goats from their northern counterparts. A similar finding was reported in Ankole cattle [49] where the results of morphological analyses were not in concordance with the molecular genetic relationship results. The authors attributed this to the fact that microsatellites loci are selectively neutral whereas morphological traits are under selection.…”

Section: Discussionsupporting

confidence: 86%

Morphological and microsatellite DNA diversity of Nigerian indigenous sheep

Agaviezor

Peters

Adefenwa

et al. 2012

J Animal Sci Biotechnol

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BackgroundSheep is important in the socio-economic lives of people around the world. It is estimated that more than half of our once common livestock breeds are now endangered. Since genetic characterization of Nigerian sheep is still lacking, we analyzed ten morphological traits on 402 animals and 15 microsatellite DNA markers in 384 animals of the 4 Nigerian sheep breeds to better understand genetic diversity for breeding management and germplasm conservation.ResultsMorphological traits of Uda and Balami were significantly (P < 0.05) higher than Yankasa, which were both higher than West African Dwarf (WAD) sheep. Stepwise discriminant analysis showed tail length, rump height, chest girth, ear length and chest depth as the most discriminating variables for classification. Mahalanobis distances show the least differentiation between Uda and Balami and the largest between WAD and Balami sheep. While 93.3% of WAD sheep were correctly assigned to their source genetic group, 63.9% of Yankasa, 61.2% of Balami and 45.2% of Uda were classified correctly by nearest neighbour discriminant analysis. The overall high Polymorphism Information Content (PIC) of all microsatellite markers ranged from 0.751 to 0.927 supporting their use in genetic characterization. Expected heterozygosity was high for all loci (0.783 to 0.93). Mean heterozygote deficiency across all populations (0.171 to 0.534) possibly indicate significant inbreeding (P < 0.05). Mean values for FST, FIT and FIS statistics across all loci were 0.088, 0.394 and 0.336 respectively. Yankasa and Balami are the most closely related breeds (DA = 0.184) while WAD and Balami are the farthest apart breeds (DA = 0.665), which is coincident with distance based on morphological analysis and population structure assessed by STRUCTURE.ConclusionsThese results suggest that within-breed genetic variation in Nigerian sheep is higher than between-breeds and may be a valuable tool for genetic improvement and conservation. The higher genetic variability in Yankasa suggests the presence of unique ancestral alleles reflecting the presence of certain functional genes which may result in better adaptability in more agro-ecological zones of Nigeria. These genetic characteristics are potentially useful in planning improvement and conservation strategies in Nigerian indigenous sheep.

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Section: Discussionsupporting

confidence: 86%

Morphological and microsatellite DNA diversity of Nigerian indigenous sheep

Agaviezor

Peters

Adefenwa

et al. 2012

J Animal Sci Biotechnol

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“…These include horn shape and size (e.g. Ankole and Kuri) (Rege et al, 2006; Ndumu et al, 2008 ; Kugonza et al, 2011 ; Terefe et al, 2015 ). In addition to physical features, non-visible traits such as disease resistance, climatic stress resistance and productivity traits also differ among breeds.…”

Section: Characteristics Of African Indigenous Cattlementioning

confidence: 99%

- Invited Review - African Indigenous Cattle: Unique Genetic Resources in a Rapidly Changing World

Mwai

Hanotte

Kwon

et al. 2015

Asian Australas. J. Anim. Sci

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247

208

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At least 150 indigenous African cattle breeds have been named, but the majority of African cattle populations remain largely uncharacterized. As cattle breeds and populations in Africa adapted to various local environmental conditions, they acquired unique features. We know now that the history of African cattle was particularly complex and while several of its episodes remain debated, there is no doubt that African cattle population evolved dramatically over time. Today, we find a mosaic of genetically diverse population from the purest Bos taurus to the nearly pure Bos indicus. African cattle are now found all across the continent, with the exception of the Sahara and the river Congo basin. They are found on the rift valley highlands as well as below sea level in the Afar depression. These unique livestock genetic resources are in danger to disappear rapidly following uncontrolled crossbreeding and breed replacements with exotic breeds. Breeding improvement programs of African indigenous livestock remain too few while paradoxically the demand of livestock products is continually increasing. Many African indigenous breeds are endangered now, and their unique adaptive traits may be lost forever. This paper reviews the unique known characteristics of indigenous African cattle populations while describing the opportunities, the necessity and urgency to understand and utilize these resources to respond to the needs of the people of the continent and to the benefit of African farmers.

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“…Informações fenotípicas também são fundamentais para a caracterização de recursos genéticos, particularmente no caso de raças exóticas ou em risco de extinção (Ndumu et al 2008).…”

Section: Fundamentação Teóricaunclassified

Obtenção de dados biométricos de bovinos para validação de modelos corporais tridimensionais

Silva¹,

Lôbo²,

Fidelis³

2019

PIC

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uso das tecnologias tridimensionais em ciência animal ainda é incipiente, mas existe um grande potencial de aplicações na pecuária, particularmente como estratégia para realização de biometria e caracterização fenotípica eliminando a subjetividade e contornando as limitações dos métodos convencionais. A técnica de luz estruturada, nesse caso, é uma ferramenta que teve por objetivo capturar modelos corporais tridimensionais para, a partir destes, obter dados biométricos em animais de produção. O estudo foi realizado na Fazenda Sucupira da Embrapa Recursos Genéticos e Biotecnologia, localizada em Brasília, DF. O experimento foi realizado entre os meses de agosto de 2018 e julho de 2019. Foram usados bovinos das raças Nelore, Pantaneiro e Curraleiro. Foi feito um acompanhamento dos animais Nelore do primeiro ao décimo segundo mês de vida, para se comparar os dados obtidos dos animais em diferentes períodos de vida. Foi utilizado o sensor iSense conectado a um iPad Air com o aplicativo Structure para fazer as imagens 3D, sendo editadas no software MeshLab para análise das imagens, limpeza das mesmas e para adquirir medidas biométricas. Também foram coletadas medidas biométricas manuais com auxílio de uma fita específica e uma balança para bovinos. Foi observado que as imagens 3D obtidas dos animais mais jovens e menores apresentou algumas distorções e imperfeições, devido ao menor tamanho dos animais. O dispositivo de luz estruturada se mostrou uma boa escolha para trabalhar com seres vivos, visto que possui bom custo benefício não é tão preciso, não havendo interferência de pequenos movimentos dos animais. Entretanto, ainda se fazem necessários mais estudos na área para comprovar a eficiência desta tecnologia para o uso no campo, como uma alternativa às coletas de dados manuais, além de estudos buscando correlacionar as características fenotípicas captadas com o sensor com características produtivas a fim de aplicar a tecnologia no melhoramento genético

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Genetic and morphological characterisation of the Ankole Longhorn cattle in the African Great Lakes region

Cited by 14 publications

References 26 publications

Morphological and microsatellite DNA diversity of Nigerian indigenous sheep

Morphological and microsatellite DNA diversity of Nigerian indigenous sheep

- Invited Review - African Indigenous Cattle: Unique Genetic Resources in a Rapidly Changing World

Obtenção de dados biométricos de bovinos para validação de modelos corporais tridimensionais

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