School of Biological and Physical Science: Recent submissions
Now showing items 601-620 of 954
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Identification of QTL for Striga hermonthica Resistance Using Backcross Population Derived from a Cross between Oryza sativa (cv. Nipponbare) and O. rufipogon
(Canadian Center of Science and Education, 2015-02-01)The obligate root hemiparasite, Striga hermonthica (Del.) Benth., native to sub-Saharan Africa causes serious economic constraint to cereal production. Studies on Striga spp. interactions with rice are desirable as it is ... -
The use of phytochemical composition of fifty (50) selected plants found in the university botanic garden, Maseno, Kenya to show
(Research gate, 2015-08-02)Qualitative phytochemical analysis of 50 plants, five each from 10 selected families is presented. The ten plant families were selected based on their high plant frequency of occurrence within the botanic garden. The ... -
Patterns of CO2 exchange and productivity of the herbaceous vegetation and trees in a humid savanna in western Kenya
(Springer Netherlands, 2015-10-01)Factors governing the dynamics between woody and herbaceous vegetation in the savanna are of ecological interest since they determine ecosystem productivity and stability. Field measurements were conducted in a humid savanna ... -
Soil properties along a gradient from hillslopes to the savanna plains in the Lambwe Valley, Kenya
(Elsevier, 2015-12-01)Changes in land use and management strongly affect the physical and chemical properties of soils and their ecological functions. Especially, regions in East Africa have experienced dramatic land use changes in the past, ... -
Carpet characteristics of eichhornia crassipes [mart.] solms (water hyacinth) in the Winam gulf (lake victoria, Kenya)
(Journal of Asian Scientific Research, 2017)The occurrence and spread of the water hyacinth (Eichhornia crassipes [Mart.] Solms), in the Winam gulf has created numerous attributes to the human population that live around the lake, thereby making its control a priority. ... -
Effect of nitrogen application on the expression of drought-induced root plasticity of upland NERICA rice
(Taylor & Francis, 2019-04-03)This study evaluated the effect of three N fertilization levels 60 (low), 120 (medium), and 180 (high) kg N ha−1 and soil moisture content gradients created by a line-source sprinkler on the expression of plasticity in ... -
Interactive influence of rainfall manipulation and livestock grazing on species diversity of the herbaceous layer community in a humid savannah in Kenya
(Elsevier, 2019-06-01)Changes in rainfall regime and grazing pressure affect vegetation composition and diversity with ecological implications for savannahs. The savannah in East Africa has experienced increased livestock grazing and rainfall ... -
Sap Flow Dynamics and Responses to Grazing and Seasonal Changes in Soil Moisture for Acacia Ancistroclada and Comberatum Molle in a Kenyan Savanna
(Research Square, 2020-08-07)The Kenyan savanna, which is dominated by Acacia ancistroclada and Comberatum molle, has experienced notable changes in rainfall patterns and increased livestock grazing. A significant decrease in trees spread from 5 % to ... -
Variation for adaptability to dryland conditions in sorghum
(African Crop Science Society, 1996)African Crop Science Journal Vol.5. No.2, pp.127-138 1997 Variation for adaptability to dryland conditions in sorghum G.O. OMANYA, P.O. AYIECHO and J.O. NYABUNDI Code Number: CS96049 Sizes of Files: Text: 33.9K Graphics: ... -
Isozyme variation among Amaranthus cultivars.
(Discovery and Innovation, 1996)Electrophoretic variation of esterase (Est), peroxidase (Per), phosphoglucoisomerase [glucose-6-phosphate isomerase] (Pgi) and phosphoglucomutase (Pgm) was studied in seven Amaranthus populations, namely, Jumla, F1 Jumla, ... -
Genetic diversity among isolates of Colletotrichum kahawae causing coffee berry disease
(Association Scientifique Internationale du Café (ASIC) 17th Colloque, Montpellier, France, 1997)En este trabajo, aislamientos de una conidia de/Colletotrichum kahawae/, se sometieron a un análisis genético usando pruebas de patogenicidad y marcadores de proteínas, isoenzimas y RAPD. Para comparar, se incluyeron las ... -
SUSTAINABLE AGRICULTURE FOR FOOD, ENERGY AND INDUSTRY pp669-675 1998 James & James (Science Publishers) Ltd Changes in nitrogen related characters in German spring barley
(James & James Science Publishers, 1998)High costs of fertiliser and environmental implications like ground water pollution are causing a concern to the use of nitrogen. Therefore, the efficient use of nitrogen fertiliser is an important goal in plant breeding ... -
Effect of infection level of sesame (sesamum indicum L.) seed by alternaria sesami on severity of alternaria leaf spot
(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998)Alternaria sesami infection in sesame seed samples collected from farmers in Busia, Kakamega and Siaya districts of Kenya was detected by oat meal agar method. Infection levels in seed samples varied from 8.96% in Kakamega ... -
Hybrid performance of sorghum and its relationship to morphological and physiological traits under variable drought stress in Kenya
(Blackwell Publishing Ltd, 1998-07-01)Sorghum, Sorghum bicolor L. Moench, is grown mostly in semi‐arid climates where unpredictable drought stress constitutes a major production constraint. To investigate hybrid performance at different levels of drought stress, ... -
Evidence of antibiosis resistance to the spotted stemborer, Chilo partellus (Swinhoe) in a maize (Zea mays L.) population
(Cambridge University Press, 1998-09)S2 line and S2 test-cross recurrent selection procedures were initiated to improve the resistance of a maize (Zea mays L.) population to the spotted stemborer, Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae). Thirty-five ... -
Evaluation of an advanced breeding population of arabica coffee
(COLLOQUE SCIENTIFIQUE INTERNATIONAL SUR LE CAFE, 1999)An advanced breeding population of Coffea arabica comprising 32 multiple cross families were preselected in the laboratory for resistance to coffee berry disease (CBD) and evaluated in the field for yield, quality and ... -
Some Pathogenic Bacteria Associated With Fresh and Smoked Nile Perch (Lates Niloticus) In Luanda Market, Vihiga County (Kenya).
(2017-07)Luanda market is located in Luanda town, Kenya. It lies 0° 0' 0" N and 34° 35' 0" E. While the Nile perch (Lates niloticus) a fresh water fish species introduced in Lake Victoria from the family latidae, order perciforme ... -
Allelopathic effects of Mexican sunflower [Tithonia diversifolia (Hemsl) A. Gray] on germination and growth of Spiderplant
(2012)Allelopathy refers to both beneficial and harmful effects of one plant on another plant by the release of chemicals from plant parts through leaching, root exudation, volatilization, residue decomposition and other processes ... -
Growth changes of seven Amaranthus (spp) during the vegetative and reproductive stages of development as influenced by variations in soil water deficit
(International Journal of Research and Innovations in Earth Science, 2015)Soil water deficit is a principal a biotic factor that limits plant growth and development in dry areas. Insufficient moisture contributes to soil water deficit and some negative effects on Amaranthus (spp) such as reduced ... -
Allelopathic potential of mexican sunflower [tithonia diversifolia (hemsl) a. Gray] on germination and growth of cowpea seedlings (vigna sinensis l.)
(2015)Allelopathy is a common among plants. Allelopathic substances affect seed germination, plant growth and development or even affect chlorophyll synthesis by the plant leaves. Tithonia diversifolia contains allelochemicals that ...
