Browsing Department of Animal Science by Issue Date
Now showing items 1-20 of 65
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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 ... -
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 ... -
Environmental effects on variation in growth and reproductive performance of Boran cattle in ASAL of Kenya
(Inter-African Bureau for Animal Resources, 2006)Environmental effects on variation in growth and reproductive performance of Boran cattle in ASAL of Kenya. -
Genetic parameters for growth and reproductive traits in the Kenya Boran cattle.
(Instituto Prociência, 2006)see more details (WW), 12-month weight, 18-month weight and 24-month weight were 0.36, 0.40, 0.38, 0.21 and 0.17, respectively while estimates for age at first calving age at first calving Subject Category: Properties -
The effect of supplementing urea treated maize stover with Tithonia, Calliandra and Sesbania to growing goats
(2006)A study was conducted to compare the effects of feeding Tithonia diversifolia (Tithonia) with Calliandra calothyrsus (Calliandra) and Sesbania sesban (Sesbania) tree legume forages as protein supplements to a basal ... -
Genetic parameters for weaning weight of Kenyan Boran cattle accounting for direct-maternal genetic covariances
(South African Society for Animal Science, 2006)Genetic parameters were estimated for weaning weight (WW) in Kenya Boran cattle using animal models that assumed non-zero direct-maternal genetic covariance. In addition to the direct and maternal genetic effects, maternal ... -
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 ... -
Evaluation of nutritive value and palatability by goats and sheep of selected browse foliages from semiarid area of Kenya
(Blackwell Publishing Asia, 2008-08-01)The feeding value of five browse foliages (Acacia brevispica, Acacia mellifera, Berchemia discolor, Zizyphus mucronata and Maerua angolensis) grown in semiarid area of Kenya were evaluated. Their chemical composition ... -
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 ... -
NON-GENETIC SOURCES OF VARIATION IN LACTATION CURVE TRAITS OF DAIRY CATTLE IN KENYA
(2010)Lactation curves are a graphical representation of the milk production profile of a cow from parturition to drying up. They provide information about the productivity of the cow and offer a means of explaining features ... -
VARIANCE COMPONENTS AND GENETIC PARAMETER ESTIMATES UNDER VARYING DEFINITIONS OF CONTEMPORARY GROUPS
(KARI, 2010)A total of 19 385 test day (TD) milk yield records were used to determine the effect of contemporary group (CG) on estimates of variance components and genetic parameters for test day milk yield (TMY) data of Sahiwal ... -
Genetic Relationship between Lactation Curve Traits in Dairy Cattle
(2010)Dairy cattle selection strategy in Kenya prefers cows with good 305-day lactation milk yield (TMY) in previous parity. This has improved milk production although increased incidences of physiological disorders and ... -
Effect of yeast supplementation on in vitro ruminal degradability of selected browse species from Kenya
(World Food Ltd, 2010-04-01)Journal of Food, Agriculture & Environment, Vol.8 (2), April 2010 553 www.world-food.net Journal of Food, Agriculture & Environment Vol.8 (2): 553-557. 2010 WFLPublisher Science and Technology Meri-Rastilantie 3 B, ... -
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 ... -
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 ... -
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 ...
