Browsing Department of Botany by Issue Date
Now showing items 1-20 of 229
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The rate of outcrossing in grain amaranths
(Blackwell Publishing Ltd, 1991-09-01)Studies of intra specific and inter specific out crossing rates were carried out for grain amaranths using two populations of A. hypochondriacus (populations 1008 and 1024) and two populations of A. cruentus (populations ... -
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 ... -
valuation for resistance to the spotted stem borer, Chilo Partellus, in a maize (zea mays L.) population. Maize Production Technology for the Future: Challenges and Opportunities. Proceedings of the Eastern and Southern Africa Regional Maize Conference, 6; Addis Ababa (Ethiopia); 21-25 Sep 1998.
(Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)., 1999)AGenetic variability and predicted responses to S2 and testcross selection methods were studied in an open-pollinated variety resistant to the spotted stem borer,(Chilo partellus Swinhoe). Evaluation after one cycle of ... -
Effect of plant age on sesame infection by Alternaria leaf spot
(African Crop Science Society (Uganda), 1999)The effect of plant growth of sesame (Sesamum indicum L.) on development of seed infection by Alternaria leaf spot, and seed infection by Alternaria sesami, was monitored in plants of sesame accession SPS SIK 110. Increase ... -
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 ... -
Rainfed Rice Production and there Germplasm Development in Kenya
(U.S. Department of Energy Office of Scientific and Technical Information, 1999-07-01)ice (Oryza Sativa L.) has been grown in Kenya for several centuries and during this time has been locally selected by farmers for adaptation in the dry climate of Kenya highlands and coastal region. this history of selection ... -
The Effect of Organic and Inorganic Sources of Fertiliser on Growth and Yield of Brassica Oleraceae var. Acephala DC
(1999-07-01)Kale (Brassica oleraceae var. Acephala D.C.) cultivar, collard green was planted in the field between October 1997 and March 1998 in the experimental plots at Maseno University college in Western Kenya. The experiment was ... -
Severity of Alternaria Leaf Spot and Seed Infection by Alternaria sesami (Kawamura) Mohanty and Behera, as Affected by Plant Age of Sesame (Sesamum indicum L.)
(Blackwell Publishing Ltd, 1999-07-01)Alternaria leaf spot incited by Alternaria sesami , was monitored to determine the effect of plant age on disease severity and seed infection by A. sesami in plots containing sesame accession SPS SIK 110 plants of five ... -
Reaction of Some Coffea arabica Genotypes to Strains of Colletotrichum kahawae, the Cause of Coffee Berry Disease
(Blackwell Publishing Ltd, 2000-01-01)Pathogenicity tests were performed on 11 genotypes of Coffea arabica using single‐isolate suspensions of Colletotrichum Kahawae obtained from 90 monoconidial isolates. The objective of this study was to estimate the ... -
Infection of sesame seed by Alternaria sesami (Kawamura) Mohanty and Behera and severity of Alternaria leaf spot in Kenya
(Taylor & Francis Group, 2000-01-01)Infection levels of Alternaria sesami in sesame (Sesamum indicum L.) seeds collected from farmers in western districts of Kenya were detected using the oatmeal agar plate method. Infection levels varied from 9% in Kakamega ... -
Yield and Yield Stability of Four Population Types of Grain Sorghum in a Semi‐Arid Area of Kenya
(Crop Breeding, Genetics & Cytology, 2000-03-01)Sorghum [Sorghum bicolor (L.) Moench] is widely grown in semi‐arid tropics where local farmers depend on the adaptability of their rainfed crops to unpredictable drought and other stress factors. To investigate the effects ... -
Yield improvement of Kenyan sesame varieties
(University of Nairobi, 2001)In an effort to improve the yield of Kenyan sesame cultivars the seeds of three cultivars, SPS SIK6, SIK 096 and SPS SIK 50/1 were subjected to 300Gy, 400Gy and 600Gy of gamma rays. A first batch of seeds were subjected ... -
Understanding yields in alley cropping maize (Zea Mays L.) and Cassia siamea Lam. under semi-arid conditions in Machakos, Eastern Kenya
(IOS Press, 2001-01-01)Six seasons of experiments in Machakos, Kenya, revealed that above about 150 mm of rainfall, maize yields per row in alley cropped "replacement" agroforestry (AF) plots, of Cassia siamea Lam. and maize (Zea mays, cv. ... -
Resistance of Coffea arabica cv. Ruiru 11 tested with different isolates of Colletotrichum kahawae, the causal agent of coffee berry disease
(Springer Netherlands, 2001-08-01)Seven single conidia isolates of Colletotrichum kahawae varying in pathogenicity were used to inoculate hybrid progenies from 66 crosses ofCoffea arabica cv. Ruiru 11. The objective of this study was to investigate the ...
