Said I. Ng’ang’a

ORCID: 0000-0003-1319-0117
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About
Contact & Profiles
Research Areas
  • Genetic and phenotypic traits in livestock
  • Genetic Mapping and Diversity in Plants and Animals
  • Animal Disease Management and Epidemiology
  • Animal Genetics and Reproduction
  • Livestock and Poultry Management
  • Livestock Farming and Management
  • Vector-Borne Animal Diseases
  • Genetic diversity and population structure
  • Primate Behavior and Ecology
  • HIV Research and Treatment
  • Cancer-related molecular mechanisms research
  • interferon and immune responses
  • Lipid metabolism and biosynthesis
  • Animal Diversity and Health Studies
  • Effects of Environmental Stressors on Livestock
  • Wildlife Ecology and Conservation
  • Animal Nutrition and Physiology
  • Rangeland Management and Livestock Ecology
  • Animal Ecology and Behavior Studies

Ludwig-Maximilians-Universität München
2021-2024

Queen Mary University of London
2021-2024

Kunming Institute of Zoology
2019-2023

Chinese Academy of Sciences
2019-2023

University of Chinese Academy of Sciences
2022

Kunming University
2021

The phenotypic diversity of African cattle reflects adaptation to a wide range agroecological conditions, human-mediated selection preferences, and complex patterns admixture between the humpless Bos taurus (taurine) humped indicus (zebu) subspecies, which diverged 150-500 thousand years ago. Despite extensive admixture, all possess taurine mitochondrial haplotypes, even populations with significant zebu biparental male uniparental nuclear ancestry. This has been interpreted as result...

10.1016/j.isci.2022.104672 article EN cc-by iScience 2022-06-26

Indigenous chickens at the Swahili coast and other traditional migratory corridors in Kenya represent important populations that are inconclusively characterized. Using a comprehensive dataset of Kenyan indigenous additional mined data from 8 African 5 Asian countries, we performed univariate multivariate assessments to uncover underlying phenotypic morphometric variability. expressed differentiation several qualitative quantitative traits, both among different counties coast, coastal,...

10.3382/ps/pez097 article EN cc-by-nc-nd Poultry Science 2019-03-09

Guenons (tribe Cercopithecini) are the most widely distributed nonhuman primate in tropical forest belt of Africa and show considerable phenotypic, taxonomic, ecological diversity. However, genomic information for species within this group is still lacking. Here, we present a high-quality de novo genome (total 2.90 Gb, contig N50 equal to 22.7 Mb) mona monkey (Cercopithecus mona), together with resequencing data 13 individuals sampled across Nigeria. Our results showed differentiation...

10.1093/molbev/msaa248 article EN cc-by Molecular Biology and Evolution 2020-09-24

Criollo cattle, the descendants of animals brought by Iberian colonists to Americas, have been subject natural and human-mediated selection in novel tropical agroecological zones for centuries. Consequently, these breeds evolved distinct characteristics such as resistance diseases exceptional heat tolerance. In addition European taurine (

10.1098/rsos.231388 article EN cc-by Royal Society Open Science 2024-03-01

Cattle are considered to be the most desirable livestock by small scale farmers. In Africa, although comprehensive genomic studies have been carried out on cattle, genetic variations in indigenous cattle from Nigeria not fully explored. this study, genome-wide analysis based genotyping-by-sequencing (GBS) of 193 Nigerian was used reveal new insights history West African and their adaptation tropical environment, particularly sub-Saharan region. RESULTS: The GBS data were evaluated against...

10.1186/s12864-022-08512-w article EN cc-by BMC Genomics 2022-04-15

The African cattle provide unique genetic resources shaped up by both diverse tropical environmental conditions and human activities, the assessment of their diversity will shade light on mechanism remarkable adaptive capacities. We therefore analyzed samples from Nigeria using maternal paternal DNA markers. Nigerian can be assigned to 80 haplotypes based mitochondrial (mtDNA) D-loop sequences haplotype was 0.985 + 0.005. network showed two major matrilineal clustering: dominant cluster...

10.7717/peerj.10607 article EN cc-by PeerJ 2021-03-05

Abstract Bos taurus (taurine) and indicus (indicine) cattle diverged at least 150,000 years ago and, since that time, substantial genomic differences have evolved between the two lineages. During last millennia, genetic exchange in Africa has resulted a complex tapestry of taurine-indicine ancestry, with most populations exhibiting varying levels admixture. Similarly, there are several Southern European also show evidence for historical gene flow from indicine cattle, highest which found...

10.1101/2024.06.20.599852 preprint EN cc-by-nc-nd bioRxiv (Cold Spring Harbor Laboratory) 2024-06-20

<title>Abstract</title> <italic>Bos taurus</italic> (taurine) and indicus</italic> (indicine) cattle diverged at least 150,000 years ago and, since that time, substantial genomic differences have evolved between the two lineages. During last millennia, genetic exchange in Africa has resulted a complex tapestry of taurine-indicine ancestry, with most populations exhibiting varying levels admixture. Similarly, there are several Southern European also show evidence for historical gene flow from...

10.21203/rs.3.rs-4622059/v1 preprint EN cc-by Research Square (Research Square) 2024-07-31

The phenotypic diversity of African cattle reflects adaptation to a wide range agroecological conditions, human-mediated selection preferences, and complex patterns admixture between the humpless Bos taurus (taurine) humped indicus (zebu) subspecies, which diverged 150-500 thousand years ago. Despite extensive admixture, all possess taurine mitochondrial haplotypes, even populations with significant zebu biparental male uniparental nuclear ancestry. This has been interpreted as result...

10.2139/ssrn.4055643 article EN SSRN Electronic Journal 2022-01-01

SUMMARY The phenotypic diversity of African cattle reflects adaptation to a wide range agroecological conditions, human-mediated selection preferences, and complex patterns admixture between the humpless Bos taurus (taurine) humped indicus (zebu) subspecies, which diverged 150-500 thousand years ago. Despite extensive admixture, all possess taurine mitochondrial haplotypes, even populations with significant zebu biparental male uniparental nuclear ancestry. This has been interpreted as...

10.1101/2021.08.26.457829 preprint EN cc-by-nc-nd bioRxiv (Cold Spring Harbor Laboratory) 2021-08-27

ABSTRACT Criollo cattle, descendants of animals brought by Iberian colonists to the Americas, have been subject centuries natural and human-mediated selection in novel tropical agroecological zones. Consequently, these breeds evolved distinct characteristics such as resistance disease exceptional heat tolerance. In addition European taurine ( Bos taurus ) ancestry, it has proposed that gene flow from African Asian indicine indicus cattle shaped ancestry cattle. this study, we analysed...

10.1101/2023.09.10.556512 preprint EN cc-by-nc-nd bioRxiv (Cold Spring Harbor Laboratory) 2023-09-10
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