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Dive into the research topics where Gideon Nyamasyo is active.

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Featured researches published by Gideon Nyamasyo.


Journal of Apicultural Research | 2017

Mitochondrial DNA (mtDNA) markers reveal low genetic variation and the presence of two honey bee races in Uganda’s agro-ecological zones

Patrice Kasangaki; Gideon Nyamasyo; Paul N. Ndegwa; Robert Kajobe; Christopher Angiro; Agapitus Kato; Charles Masembe

As plant pollinators, honey bees (Apis mellifera) play a very important role in agricultural and non agricultural crop production. In addition, honey bee products are of nutritional, medicinal, cosmetic and economic value to society. With the current changing trends in Uganda’s farming systems, it is important to determine the level of genetic variation, and extent of differentiation in the honey bee population. This will be crucial for a successful honey bee management system for improved productivity and conservation of the honey bees in the different agro-ecological zones of Uganda. To achieve this, we investigated the genetic variation in honey bees from ten agro-ecological zones of Uganda by sequencing the intergenic region of the Mitochondrial DNA (mtDNA) COI-COII. We observed high haplotype diversity (Hd > 0.530) within a majority of the agro-ecological zones except the Southern Highland agro-ecological zone (Hd = 0.154). Both the population structure and the phylogenetic analyses revealed the presence of two honey bee races (A. m. adansonii and A. m. scutellata) in Uganda. A. m. adansonii is more widespread in the agro-ecological zones in the northern and eastern parts of Uganda while A. m. scutellata is more spread in the southern and western parts of the country. This is the first exhaustive population genetics research on bees in Uganda, and provides results that are useful to the beekeeping industry for effective management of the honey bee population. These results should be considered while planning beekeeping activities in the country.


Tropical and Subtropical Agroecosystems | 2009

MACROFAUNA DIVERSITY AND ABUNDANCE ACROSS DIFFERENT LAND USE SYSTEMS IN EMBU, KENYA

Fred Ayuke; Nancy Karanja; Edward Muya; Musombi Kibberenge; Joseph Mungatu; Gideon Nyamasyo


Tropical and Subtropical Agroecosystems | 2011

Pest status of bean stem maggot (Ophiomyia spp.) and black bean aphid (Aphis fabae) in Taita District, Kenya

Willis Ochillo; Gideon Nyamasyo


Tropical and Subtropical Agroecosystems | 2009

Soil macrofauna community structure across land use systems of Taita, Kenya

Nancy Karanja; F.O. Ayuke; Edward Muya; Musombi Kibberenge; Gideon Nyamasyo


Tropical and Subtropical Agroecosystems | 2011

ABUNDANCE AND DIVERSITY OF SOIL MITES (ACARI) ALONG A GRADIENT OF LAND USE TYPES IN TAITA TAVETA, KENYA

Cris Maribie; Gideon Nyamasyo; Paul N. Ndegwa; Joseph Mungatu; Jan Lagerlöf; M. Gikungu


Tropical and Subtropical Agroecosystems | 2009

COLLEMBOLA DENSITY AND DIVERSITY ALONG A GRADIENT OF LAND- USE TYPES IN EMBU DISTRICT, EASTERN KENYA

Jamleck Muturi; J. P. Mbugi; J. M. Mueke; Jan Lagerlöf; Joseph Mungatu; Gideon Nyamasyo; M. Gikungu


Tropical and Subtropical Agroecosystems | 2009

COLLEMBOLA RICHNESS AND DIVERSITY ALONG A LAND-USE INTENSITY GRADIENT IN TAITA, KENYA

Jamleck Muturi; J.P Mbugi; J. M. Mueke; Jan Lagerlöf; Joseph Mungatu; Gideon Nyamasyo; M. Gikungu


Tropical and Subtropical Agroecosystems | 2011

Effect of integrated soil fertility management interventions on the abundance and diversity of soil Collembola in Embu and Taita Districts, Kenya

Jamleck Muturi; John Mbugi; John Mueke; Jan Lagerlöf; J.K. Mung'atu; Gideon Nyamasyo; M. Gikungu


Tropical and Subtropical Agroecosystems | 2011

8.Maribie, C.W.; Nyamasyo, G.H.N.; Ndegwa, P.N.; Lagerl, F, J.; Gikungu, M. (2011). Abundance and diversity of soil mites (acari) along a gradient of land use types in Taita Taveta, Kenya.

C.W. Maribie; Gideon Nyamasyo; Paul N. Ndegwa; Lagerl, F, J; M. Gikungu


Tropical and Subtropical Agroecosystems | 2010

Collembola Richness And Diversity Along A Gradient Of Land-use Intensity And Soil Abiotic Factors In Taita, Kenya

Jamleck Muturi; J.P Mbugi; J Mueke; Jan Langerlof; Joseph Mungatu; Gideon Nyamasyo; Mary Gikungu

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Joseph Mungatu

Swedish University of Agricultural Sciences

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Jan Lagerlöf

Swedish University of Agricultural Sciences

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J.K. Mung'atu

Jomo Kenyatta University of Agriculture and Technology

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