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Professor, Animal Breeding and Genetics Animal Science Department |
Tel: (352) 392-7564 |
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Selected Presentations
Education
Employment
ANS 6386 (S) -
Advanced Animal Breeding [ANIMAL
BREEDING NOTES]
ANS 6905 (F, S, SS) - Problems in Animal Science
ANS 7979 (F, S, SS) - Advanced Research
ANS 7980 (F, S, SS) - Research for Doctoral Dissertation
Development of models
and procedures to improve the predictive ability and the accuracy of genetic
evaluation, selection and mating strategies of straightbred and crossbred
animals in national and international multibreed populations for individual
traits and for functions of traits under various environmental conditions.
Research covers
methodological, computational, biological, and applied aspects of genetic
evaluation and estimation of genetic parameters in multibreed populations. Models and procedures are validated using
national and international experimental and field multibreed data sets.
Hatch Research
Project: FLA-ANS-04263 “Improvement of
Beef Cattle in Multibreed Populations: Phase IV”.
PRJ-172 “Dairy Breed
Research and Development at the Suwanvajokkasikit Research and Development
Center, Kamphangsaen, Thailand”.
PRJ-204 “Genetic
evaluation of animals in Bos taurus x Bos indicus multibreed populations of
beef cattle in
PRJ-471 “Genetic
Improvement of Bolivian Criollo Cattle”.
PRJ-505
“Characterization of genetic, environmental, and economic factors affecting net
profits of dairy farmers in
PRJ-975 “Genetic
improvement of swine for reproduction, production, and health traits raised in
tropical environments”.
PRJ-1351 “Genetic
improvement and crossbreeding for beef and dairy cattle in Colombia”.
Refereed
- Rhone, J. A., S.
Koonawootrittriron, and M. A. Elzo.
2008. Record
keeping, genetic selection, educational experience and farm management
effects on average milk yield per cow, milk fat percentage, bacterial
score and bulk tank somatic cell count of dairy farms in the Central
region of Thailand. Trop. Anim.
Health Prod. DOI: 10.1007/s11250-008-9141-6.
- Rhone, J. A., S.
Koonawootrittriron, and M. A. Elzo.
2008. A
survey of decision making practices, educational experiences, and economic
performance of two dairy farm populations in Central Thailand. Trop. Anim. Health Prod. DOI: 10.1007/s11250-007-9123-0.
- Rhone, J. A., R.
Ward, A. de Vries, S. Koonawootrittriron,
and M. A. Elzo. 2007.
Comparison
of two milk pricing systems and their effect on milk price and milk
revenue of dairy farms in the Central region of Thailand. Trop. Anim. Health Prod. DOI:
10.1007/s11250-007-9109-y.
- Rhone, J. A., S.
Koonawootrittriron, and M. A. Elzo.
2007. Factors
affecting milk yield, milk fat, bacterial score, and bulk tank somatic
cell count of dairy farms in the central region of Thailand. Trop. Anim. Health Prod. DOI:
10.1007/s11250-007-9074-5.
- Elzo, M. A.
2006. Genetic evaluation of
animals in multibreed cattle populations using linear models. Latin-Amer. Arch. Anim. Prod.
14:154-160 [Spanish]
- Reyes, A. de los, M. A. Elzo, A. C. Sanches,
R. B. Lobo, and L. A. F. Becerra. 2006. Effect of sire × maternal grandsire
interactions on (co)variance estimates and genetic trends for pre-weaning
growth traits in Brazilian Nellore cattle. Brazilian Anim. Sci. 7:365-371. [Portuguese]
- Elzo, M. A., D. O. Rae, S. E. Lanhart, J. G. Wasdin,
W. P. Dixon, and J. L. Jones.
2006. Factors associated with
ELISA scores for paratuberculosis in an Angus-Brahman multibreed herd of
beef cattle. J. Anim. Sci. 84:41-48.
- Elzo, M. A., and A. de los Reyes Borjas. 2004.
Perspectives for multibreed genetic evaluation of cattle in
- Elzo, M. A., A. Jara, and N. Barria. 2004.
Genetic
Parameters and Trends in the Chilean Multibreed Dairy Cattle Population. J. Dairy Sci. 87:1506-1518.
- Reyes Borjas A. de los, M. A. Elzo, R.
B. Lôbo, and L. A. F. Bezerra. 2003. Effects of
Selection of Young Nellore Bulls for Scrotal Circumference on Growth
Traits of Their Progenies.
Livest. Res. Rural Devel. 15(10).
Available (Spanish): http://www.cipav.org.co/lrrd/lrrd15/10/reye1510b.htm.
- Reyes Borjas A. de los, M. A. Elzo, R.
B. Lôbo, L. A. F. Bezerra, and C. de U. Magnabosco. 2003.
Genetic
Variability of Alternative Measures of Scrotal Circumference in Nellore
Cattle. Livest. Res. Rural
Devel. 15(10). Available (Spanish): http://www.cipav.org.co/lrrd/lrrd15/10/reye1510a.htm.
- Koonawootrittriron, S., M. A. Elzo,
and S. Tumwasorn. 2002. Multibreed Genetic
Parameters and Predicted Genetic Values for First Lactation 305-d Milk
Yield, Fat Yield, and Fat Percentage in a Bos taurus ´ Bos indicus Multibreed
Dairy Population in Thailand. Thai J. Agric. Sci. 35:339-360.
[htm][pdf]
- Koonawootrittriron, S., M. A. Elzo,
S. Tumwasorn, and K. Nithichai.
2002. Estimation of
Covariance Components and Prediction of Additive Genetic Effects for First
Lactation 305-d Milk and Fat Yields in a Thai Multibreed Dairy
Population. Thai J. Agric. Sci.
35:245-258. [htm][pdf]
- Koonawootrittriron, S., M. A. Elzo,
S. Tumwasorn, and W. Sintala.
2001. Prediction of 100-d and
305-d milk yields in a multibreed dairy herd in
- Koonawootrittriron, S., M. A. Elzo,
S. Tumwasorn, and W. Sintala.
2001. Lactation curves and
prediction of daily and accumulated milk yields in a multibreed dairy herd
in
- Elzo, M. A., G. Martinez, F. Gonzalez, and H. Huertas. 2001. Additive,
Nonadditive, and Total Genetic Variation and Genetic Predictions for
Growth Traits in the Sanmartinero-Zebu Multibreed Herd of La Libertad.
J. CORPOICA 3(2):51-64.
- Vargas, C. A., M. A. Elzo, C. C.
Chase, and T. A. Olson. 2000. Genetic parameters
and relationships between hip height and weight in Brahman cattle. J. Anim. Sci. 78:3045-3052.
- Vargas, C. A., T. A. Olson, C. C. Chase,
A. C. Hammond, and M. A. Elzo. 1999. Influence of frame
size and body condition score on performance of Brahman cattle. J.
Anim. Sci. 77:3140 –3149.
- Manrique, C., M. A. Elzo, W. O.
Odenya, L. R. McDowell, and L. D. Wakeman. 1998. Changes in the
prediction of genetic values for weaning weight due to the use of
nutritional traits in multibreed evaluations. J. CORPOICA 2(2):49-56.
- Vargas, C. A., T. A. Olson, M. A. Elzo,
C. C. Chase, Jr., and P. J. Chenoweth. 1998. Estimation of
genetic parameters for scrotal circumference, age at puberty in heifers,
and hip height in Brahman cattle. J. Anim. Sci.
76:2536-2541.
- Elzo, M. A., and D. L. Wakeman. 1998. Covariance components and
prediction for additive and nonadditive preweaning growth genetic effects
in an Angus-Brahman multibreed herd. J. Anim. Sci. 76:1290-1302.
- Elzo, M. A., C. Manrique, and G. Ossa. 1997. Genetic evaluation of Criollo cattle and
their crossbreds in Colombia. J. CORPOICA 2:34-44.
- Manrique, C., M. A. Elzo, W. O.
Odenya, L. R. McDowell, and D. L. Wakeman. 1997. Prediction of
additive and nonadditive effects for weight at weaning using a multibreed
animal evaluation procedure. J. CORPOICA 2(1):17-21.
- Elzo, M. A. 1996. Unconstrained procedures for the
estimation of positive definite covariance matrices using restricted
maximum likelihood in multibreed populations. J. Anim. Sci. 74:317-328.
- Odenya, W. O., M. A.
Elzo, C. Manrique, L. R. McDowell, and D. L. Wakeman. 1992.
Genetic
and environmental factors affecting serum macrominerals and weights in an
Angus-Brahman multibreed herd: II.
Heritabilities of and genetic, environmental and phenotypic
correlations among serum calcium, phosphorus and magnesium and weight at
weaning. J. Anim. Sci.
70:2065-2071.
- Odenya, W.O., M. A.
Elzo, C. Manrique, L. R. McDowell, and D. L. Wakeman. 1992.
Genetic
and environmental factors affecting serum macrominerals and weights in an
Angus-Brahman multibreed herd: I.
Additive and nonadditive group genetic effects of serum calcium,
phosphorous and magnesium and weight at weaning. J. Anim. Sci. 70:2072-2077.
- Elzo, M. A. 1990.
Covariances
among sire × breed group of dam interaction effects in multibreed sire evaluation
procedures. J. Anim. Sci.
68:4079-4099.
- Elzo, M. A. 1990.
Recursive
procedures to compute the inverse of the multiple trait additive genetic covariance
matrix in inbred and noninbred multibreed populations. J. Anim. Sci. 68:1215-1228.
- Elzo, M. A., E. J.
Pollak, and R. L. Quaas. 1987. Genetic trends due to
bull usage in the Simmental population. J. Anim. Sci. 64:983-991.
- Elzo, M. A., and G. E.
Bradford. 1985. Multibreed sire
evaluation across countries. J.
Anim. Sci. 60:953-963.
- Elzo, M. A., and T. R.
Famula. 1985. Multibreed sire
evaluation within a country. J.
Anim. Sci. 60:942-952.
Proceedings
- Elzo, M. A. 2007. Multibreed genetic evaluation of bovine
livestock. Rev. Col. Cienc. Pec.
20:504-507. [Spanish]
- Reyes, A. de los, M. A.
Elzo, L. A. Fries, V. M. Roso, and R. Carvalheiro. 2006. Non-genetic,
additive and non-additive genetic effects for animal model analyses of
weaning weights in a Nellore x Hereford multibreed population in Brazil. Paper 03-77 in Proc. 8th
World Cong. Genet. Appl. Livest. Prod.,
- Elzo, M. A, D. O. Rae, S. E.
Lanhart, J. G. Wasdin, W. P. Dixon, and J. L. Jones. 2006.
Association
between reproduction and preweaning growth traits and ELISA scores for
paratuberculosis in an Angus-Brahman multibreed herd of beef cattle. Paper 03-36 in Proc. 8th
World Cong. Genet. Appl. Livest. Prod.,
- Reyes, A. de los, M. A. Elzo, V. M.
Roso, L. A. Fries, and R. Carvalheiro.
2006. Non-genetic effects for the composition
of contemporary groups on birth to weaning growth of a
- Reyes, A. de los, M. A. Elzo, A. C. Sanches,
R. B. Lobo, and L. A. F. Becerra. 2005. Inclusion of sire × maternal grandsire
interaction on models for (co)variance estimation and genetic evaluation
of pre-weaning growth traits in
- Koonawootrittriron, S., M.
Elzo, P. Sopanarat, S. Tumwasorn, T. Tongprapi, C. Chaimongkol, and K.
Nithichai. 2004. A Case Study on Phenotypic and Genetic
Trends for First Lactation Productions of a Multibreed Dairy Population in
- Koonawootrittriron, S., P.
Sopanarat, M. Elzo, and S. Tumwasorn. 2003. Breeding value for first lactation milk
yield in dairy cattle under Thai environmental conditions. Pages 40-48 in Proc. 7th
Conf. on Dairy and Beef Cattle Production of the Rajamangala Institute of
Technology,
- Koonawootrittriron, S., M.
Elzo, S. Tumwasorn, and K. Nithichai.
2003. Prediction of Additive
Genetic Effects for First Lactation 305-d Milk and Fat Yield in a Thai
Multibreed Dairy Population. Pages 261-271 in Proc. 41st
- Jara, A., D. Casanova, M. Elzo, and
N. Barria. 2002.
(Co)Variance
components for first lactation milk yield at three production and
variability levels in Argentinian dairy cows. Proc. 7th World Cong. Genet.
Appl. Livest. Prod. CD-ROM Communication No 18-14.
- Elzo, M. A., G. Martinez, D. L. Wakeman, W. P. Dixon,
and J. G. Wasdin. 2002. Nonadditive
genetic variability in Bos taurus-Bos indicus multibreed herds of
beef cattle. Proc. 7th
World Cong. Genet. Appl. Livest. Prod. CD-ROM Communication No
17-18.
- Elzo, M. A., D. D. Johnson, D. L. Wakeman, R. L.
West, J. G. Wasdin, and W. P. Dixon.
2002. What Amount of Brahman
Influence Will Meet The Targets of Branded Beef Programs? Pages 25-41 in Proc. 50th
Annual
- Jara, A., M. A. Elzo, and N.
Barria. 2001. A Bayesian approach to estimate
variance components in a heteroskedastic additive genetic model. II. A
Simulation Study. XVII Meeting
of the Latin American Association of Animal Production. Evaluation and Characterization of
Animal Genetic Resources G43:1936-1939.
- Jara, A., M. A. Elzo, and N.
Barria. 2001. A Bayesian approach to estimate
variance components in a heteroskedastic additive genetic model. I.
Theoretical aspects. XVII
Meeting of the Latin American Association of Animal Production. Evaluation and Characterization of
Animal Genetic Resources G36:1964-1967.
- Elzo, M. A. 2000. Multibreed Evaluation - Theory and
Application.
Proc. 7th
Genetic Prediction Workshop,
- Elzo, M. A., G. Martinez, and C. Manrique.
1999. Multibreed genetic evaluation and its application to Criollo cattle
breeding programs. Pages 150-158 in Proc. Census and Characterization of
Colombian and Criollo Cattle Production Systems Agricultural Colombian
Institute,
- Elzo, M. A., G. Martinez, F. Gonzalez, and H. Huertas. 1999. Variability and genetic
predictions for beef traits in the Colombian Sanmartinero-Zebu multibreed
herd of La Libertad. Pages 54-81 in Proc. International Conference on
Genetic Characterization and Production Potential of the Sanmartinero
Criollo Cattle Agricultural Colombian Institute,
- Elzo, M. A., D. L. Wakeman, and W. P. Dixon.
1998. Genetic variability and sire evaluation
for additive and nonadditive preweaning growth genetic effects in and
Angus-Brahman multibreed population. Proc. 6th World Conf.
Genet. Appl. Livest. Prod. 23:93-96.
- Elzo, M. A., C. Manrique, G. Ossa, and O.
Acosta. 1996.
Use of multibreed animal models for the
genetic evaluation of animals in tropical production conditions. Pages 1-12 in Proc. 3rd
Iberoamerican Congress on Criollo and Native Breeds,
- West, R. L., M. A. Elzo, and D. L.
Wakeman. 1995. Effects of breed composition on carcass and
meat traits. Pages 150-154 in Proc. Beef Cattle Short Course,
- Elzo, M. A., S.
Koonawootrittriton, and S. Tumwasorn. 2002.
National Genetic Improvement Programs: Challenges and Rewards. Animal Breeding Mimeo Series, No. 59,
Animal Science Dept., University of Florida, Gainesville, p 1-11. [htm][pdf]
- Elzo, M. A. 2002.
Evolution of Genetic Improvement Practices in Domestic Animal
Populations. Animal Breeding Mimeo
Series, No. 58, Animal Science Dept., University of Florida, Gainesville,
p 1-29. [htm][pdf]
- Elzo, M. A., D.
D. Johnson, D. L. Wakeman, R. L. West, W. P. Dixon, and J. G. Wasdin. 2002.
Means and numbers
of progeny by sire ´ breed-group-of-dam subclass
for calf survival, reproduction, growth, and carcass traits in the
Angus-Brahman multibreed herd of the University of Florida. Animal Breeding Mimeo Series, No. 57,
Animal Science Dept., University of Florida, Gainesville, p 1-205.
- Elzo, M. A., D.
D. Johnson, D. L. Wakeman, R. L. West, W. P. Dixon, and J. G. Wasdin. 2002.
Means and numbers
of progeny by breed-group-of-sire ´
breed-group-of-dam subclass for calf survival, reproduction, growth, and
carcass traits in the Angus-Brahman multibreed herd of the University of
Florida. Animal Breeding Mimeo
Series, No. 56, Animal Science Dept., University of Florida, Gainesville,
p 1-17.
- Elzo, M. A.
2002. Multibreed Connectedness
Program CSET (version 11/21/2001).
Animal Breeding Mimeo Series, No. 54, University of
- Elzo, M. A. 2002.
Multibreed
Editing Program EDPED (version 11/15/2001). Animal Breeding Mimeo Series, No. 53,
University of
- Elzo, M. A. 2002.
Manual for MREMLEM
(version 12/15/2001): A program for the estimation of covariance
components, genetic parameters, and genetic predictions of additive and
nonadditive intra and interbreed genetic effects in multibreed
populations. Animal Breeding
Mimeo Series, No. 52, University of
- Elzo, M. A. 2001.
Discussion on the Current Situation of Animal Genetic Improvement
and Its Prospects for the Future.
Animal Breeding Mimeo Series, No. 43, University of
- Peña, R. E., M.
A. Elzo, and F. Rojas. 1999. Genetic Characterization of Criollo
Cattle in Bolivia: II. Sire Usage and Genetic Trends for Pre
and Postweaning Growth Traits.
Animal Breeding Mimeo Series, No. 31, Animal Science Dept.,
University of Florida, Gainesville, p 1-41.
- Peña, R. E., M.
A. Elzo, and F. Rojas. 1998. Genetic Characterization of
Criollo Cattle in Bolivia: I. Genetic Parameters for Pre and
Postweaning Growth Traits.
Animal Breeding Mimeo Series, No. 30, Animal Science Dept.,
University of Florida, Gainesville, p 1-29.
- Elzo, M. A., and
J. P. Hobert. 1999. Derivation of the Standard
Error of Multibreed Restricted Maximum Likelihood Estimates of Covariance
Components Computed Using an Expectation-Maximization Algorithm. Animal Breeding Mimeo Series, No. 29,
Animal Science Dept., University of Florida, Gainesville, p 1-12.
- Elzo, M. A., R.
L. West, D. L. Wakeman, and W. P. Dixon.
1996. Reproduction, growth, and
carcass traits in the Angus-Brahman multibreed herd of the University of
Florida. Animal Breeding Mimeo
Series, No. 22, Animal Science Dept., University of Florida, Gainesville,
p 1-24.
- Manrique, C.*,
M. A. Elzo, W. O. Odenya*, L. R. McDowell, and D. L.
Wakeman. 1992. Changes in additive and
nonadditive genetic evaluation for weight during preweaning growth using a
multibreed animal evaluation procedure. Animal Breeding Mimeo Series, No. 15,
Animal Science Dept., University of Florida, Gainesville, p 1-17.
- Manrique, C.*,
M. A. Elzo, W. O. Odenya*, L. R. McDowell, and D. L.
Wakeman. 1992. Changes in additive and
nonadditive genetic variances of weights and macrominerals during
preweaning growth. Animal
Breeding Mimeo Series, No. 14, Animal Science Dept., University of
Florida, Gainesville, p 1-16.
- Manrique, C.*,
M. A. Elzo, W. O. Odenya*, L. R. McDowell, and D. L.
Wakeman. 1992. Changes in the relative
importance of additive and nonadditive group genetic effects for weights
and macrominerals for preweaning growth. Animal Breeding Mimeo Series, No. 13,
Animal Science Dept., University of Florida, Gainesville, p 1-30.
- Odenya, W. O.*,
M. A. Elzo, C. Manrique*, L. R. McDowell, and D. L.
Wakeman. 1992. Heritabilities of and
genetic, environmental and phenotypic correlations among serum potassium
and sodium and weight at weaning in an Angus-Brahman multibreed herd. Animal Breeding Mimeo Series, No. 12,
Animal Science Dept., University of Florida, Gainesville, p 1-15.
- Odenya, W.O.*,
M. A. Elzo, C. Manrique*, L. R. McDowell, and D. L.
Wakeman. 1992. Additive and nonadditive
group genetic effects of serum potassium and sodium and weight at weaning
in an Angus-Brahman multibreed herd.
Animal Breeding Mimeo Series, No. 11, Animal Science Dept.,
University of Florida, Gainesville, p 1-19.
- Koonawootrittriron, S., M.
Elzo, T. suwanasopee, P. Sopanarat, S. Prasanpanich, C. Chaimongkol, T.
Tongprapi, and T. Ralukmun. 2008. D.P.O. Sire & Dam
Summary 2007. Dairy Promotion Organization, Ministry of Agriculture
and Cooperatives of
Invited
- Elzo, M. A. 2007.
Genetic improvement of cattle for beef and milk. Int. Sem. Lipids and Their Impact on
Anim. Prod. and Human Health, Medellín, Colombia, October 30-31,
2007. [Spanish]
- Elzo, M. A. 2007.
Genetic evaluation in bovine multibreed populations. 9th Nat. and 2nd
Int. Conf. Res. Livest. Sci., Medellín, Colombia, November 1-3, 2007. [Spanish]
- Elzo, M. A. 2006.
Basic
concepts of applied genetics.
- Elzo, M. A. , D.
O. Rae, S. E. Lanhart, J. G. Wasdin, W. P. Dixon, J. L. Jones, and J. D.
Driver. 2006. Does subclinical paratuberculosis have
effect on economically important traits in beef cattle? Thirty Fifth
- Elzo, M. A. , D.
O. Rae, S. E. Lanhart, J. G. Wasdin, W. P. Dixon, and J. L. Jones. 2005.
Genetic
Analysis of ELISA Scores for Paratuberculosis in Beef Cattle.
- Elzo, M. A. , S.
Koonawootrittriron, and S. Tumwasorn.
2005. Current
Situation and Future Prospects for National Genetic Evaluation of Cattle
in Thailand.
- Elzo, M. A. , S.
Koonawootrittriron, and S. Tumwasorn.
2002. National Genetic
Improvement Programs: Challenges
and Rewards.
- Elzo, M. A. 2002.
Evolution
of Genetic Improvement Practices in Domestic Animal Populations.
- Elzo, M. A.
2002. Phenotypic and Genetic
Aspects of Meat Quality. 36th
International Conference on Livestock in the
Tropics,
- Elzo, M. A.
2002. What Amount
of Brahman Influence Will Meet The Targets of Branded Beef Programs? 50th Annual
- Elzo, M. A. 2000.
Multibreed
Animal Evaluation and Its Application to the Thai Environment. Marouy Hotel,
- Elzo, M. A. 1999.
Multibreed
Evaluation - Theory and Application.
Seventh Genetic Prediction Workshop,
- Elzo, M. A. 1999.
Multibreed genetic evaluation and its
application to Criollo cattle breeding programs. Conference on Census and
Characterization of Colombian and Criollo Livestock Production Systems,
- Elzo, M. A. 1999.
Conservation, Genetic Improvement, and
Strategic Use of Sanmartinero Criollo Cattle in Piedemonte and Altillanura
Farms. Conference on the Genetic
Characterization and Productive Potential of the Sanmartinero Criollo
Cattle",
- Elzo, M. A. 1998.
Genetic evaluation of dairy sires in
different environments. Tenth
National Congress of Veterinary Medicine,
Regular
- Koonawootrittriron, S., M. A. Elzo,
and T. Suwanasopee. 2007. Genetic trends for dairy traits in the
Holstein x Other Breeds multibreed dairy cattle population in tropical
central