School of Agriculture and Food Security: Recent submissions
Now showing items 201-220 of 427
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Estimates of genetic Parameters for growth of Kenya Boran cattle using Random Regression models
(2006)Data consisting of 18 884 weight records collected from 1 273 Boran cattle from birth to 24months of age were used to estimate genetic parameters for growth of Boran cattle using random regression (RR) models under ... -
Beef production in the arid and semi-arid lands of Kenya: constraints and prospects for research and development
(SAGE Publications, 2006-09)Most of Kenya (80%) is classified as arid and semi-arid. The climatic conditions in these regions are so harsh for crops that only livestock production can thrive. These regions provide the bulk of beef consumed in the ... -
Genetic evaluation of milk yield of Bos taurus dairy breeds in Kenya
(2006-11-12)The objective of this study was to quantify the rate of genetic progress in 305-d milk yield (MY) in Bos taurus dairy cattle breeds. The Bos taurus breeds considered were Holstein Friesian (F), Ayrshire (A), Jersey (J) and ... -
Estimation of maternal covariance components for growth traits in the Sahiwal cattle
(2007)Maternal influence on growth of artificially reared Sahiwal cattle was investigated using data from the National Sahiwal Stud (NSS). Growth records on animals born from 1973 to 2004 were used for the analysis. The ... -
Genetic evaluation of growth of Kenya Boran cattle using random regression models
(Springer Netherlands, 2007-10-01)Data consisting of 18 884 weight records collected from 1273 Boran cattle from birth to 24 months of age were used to estimate covariance functions and genetic parameters for growth of Boran cattle using random regression ... -
Direct and maternal (co) variance components and genetic parameters for growth and reproductive traits in the Boran cattle in Kenya
(Springer Netherlands, 2009-06-01)Direct and maternal (co)variance components and genetic parameters were estimated for growth and reproductive traits in the Kenya Boran cattle fitting univariate animal models. Data consisted of records on 4502 animals ... -
Genetic evaluation of growth of Dorper sheep in semi-arid Kenya using random regression models
(Elsevier, 2010-10-01)Data consisting of 8922 weight records from 2642 Dorper sheep from 20 to 380 days of age spanning 1981–1996 were used to model the growth trajectory using random regression (RR) and estimate genetic parameters. The independent ... -
Factors that influence the efficiency of beef and dairy cattle recording system in Kenya: A SWOT–AHP analysis
(Springer Netherlands, 2011-01-01)Animal recording in Kenya is characterised by erratic producer participation and high drop-out rates from the national recording scheme. This study evaluates factors influencing efficiency of beef and dairy cattle recording ... -
Genetic relationship between lactation curve traits in the first three parities of dairy cattle
(2014-10-07)In Kenya, selection of dams for the national contract mating scheme is based on 305-day lactation milk yield (TMY) performance across parities. At farm level, only cows that had good TMY performance in previous parity are ... -
The past, present and future genetic improvement of indigenous chicken of Kenya
(Organización de las Naciones Unidas para la Agricultura y la Alimentación (FAO), 2014)Genetic improvement of farm animals encompasses both mating and selection for desired traits and indigenous chicken genetic resources are no exception. In Kenya, previous attempts to genetically improve indigenous chicken ... -
Modelling of lactation curves of dairy cows based on monthly test day milk yield records under inconsistent milk recording scenarios
(Cambridge University Press, 2011-11-01)The objective of this study was to describe the lactation curve of dairy cattle in Kenya using a suitable lactation function in order to facilitate inclusion of partial lactations in national dairy cattle evaluation and ... -
A participatory approach to the evaluation of the efficiency of animal recording practices based on institutional analysis and development framework
(Cambridge University Press, 2011-02-01)Animal recording is an interactive process that involves several practices. The efficiency of the process is essential to ensure the utility of outcomes necessary for sustainable participation. Most evaluation approaches ... -
Preliminary selection results for body weight in indigenous chicken in Kenya
(2015)Body weight at 12 weeks of age records of 443 indigenous chicken, progeny of 44 sires were used to estimate preliminary results of selection for growth in indigenous chicken in Kenya after two generations of selection. ... -
Intensive livestock recording for sustainable breeding programs and adaptation strategy to climate change
(206)The hypothesis that, intensive recording is needed for sustainable breeding programs in developing countries in the face of climate change was tested.Using stochastic simulation, genetic gain realised by breeding strategies ... -
1683 Genome-wide association analysis of residual feed intake and milk yield in dairy goats
(Oxford University Press, 2016-10-01)Interest in both dairy and meat goat production in the US has been increasing, and there is tremendous opportunity for genetic progress in traits that are easy to measure (e.g., milk yield) and those that are more difficult ... -
Variation and Repeatability of Natural Antibodies Against Keyhole Limpet Hemocyanin of Indigenous Chicken of Kenya
(2016-10-21)The immune system is designed to provide protection to the body by combating a plethora of pathogenic micro-organisms. Identifying animals with a natural ability to make superior immune responses reduces disease occurrences, ... -
Genetic and phenotypic parameters for feed efficiency in indigenous chicken in Kenya
(Elsevier, 2018-01-01)This study aims to determine the genetic and phenotypic parameters of net feed efficiency (NFE) traits namely Residual feed intake (RFI), residual gain (RG), and residual intake and gain (RIG) along the growth curve of ... -
Characterisation of physical egg qualities in indigenous chicken under free range system of production in Western Kenya
(2018)The study was conducted with the aim of characterizing the indigenous chicken (IC) egg production system to determine management practices and how they impact on external egg qualities. Opportunity was taken to identify ... -
Attitude of indigenous chicken farmers towards agricultural insurance in Nyanza, Kenya
(Academic Journals, 2018-05-30)Indigenous chicken (IC) contribute significantly to income and food security of rural communities. However, the IC are kept in systems that are characterised by high risk conditions such as diseases, predation, inadequate ... -
Adaptation of Smallholder Dairy Farmers in South Western Kenya to the Effects of Climate Change
(Scientific Research Publishing, 2019-07-25)Despite great potential, Kenyan smallholder dairying faces diminishing land sizes, high input costs, poor extension contacts, non-responsive price policies, and new pests and diseases. Climate change will worsen the ...