ORIGINAL PAPER
An evaluation of maternal influences on growth traits: the Zandi sheep breed of Iran as an example
 
More details
Hide details
1
Department of Animal Breeding and Genetics, Animal Science, Research Institute of Iran, Karaj 31585, Iran
2
Department of Animal Science, University of Zanjan, Tabriz road, Zanjan 45195, Iran
CORRESPONDING AUTHOR
F. Ghafouri-Kesbi   

Department of Animal Breeding and Genetics, Animal Science, Research Institute of Iran, Karaj 31585, Iran
Publication date: 2008-10-27
 
J. Anim. Feed Sci. 2008;17(4):519–529
 
KEYWORDS
ABSTRACT
An animal model was used to estimate direct and maternal genetic parameters for birth weight (BW), weaning weight (WW), 9-month weight (W9) and yearling weight (YW) for a population of Zandi sheep. The magnitude of estimates of these parameters was used to evaluate the importance of direct and maternal influences on body weight at various stages of Zandi lambs’ life. Results confirmed the potential maternal influences to change pattern of body weight’s heritability with age. Maternal influences were significant for early growth traits. The importance of maternal influences diminished with age, although for W9 and YW those effects did not disappear completely. In contrast to variation due to maternal effects, the variance of direct effects increased from birth to a year of age. Estimates of maternal breeding values averaged by year of birth decreased throughout the experiment for both BW and WW. It was concluded that for more precise designing selection programs and, in consequence, increasing efficiency of selection, inclusion of maternal effects as well as direct-maternal genetic covariance into the model, especially for early growth traits, is necessary.
 
CITATIONS (13):
1.
A genetic study on sexual dimorphism of bodyweight in sheep
Farhad Ghafouri-Kesbi, Ghodratollah Rahimi Mianji, Zarbakht Ansari Pirsaraei, Seyed Hasan Hafezian, Hasan Baneh, Bijan Soleimani
Animal Production Science
 
2.
Estimation of genetic parameters for body weight traits and pelt quality score in Iranian Karakul sheep
Seyed Ziaeddin Mirhoseini, Jalal Zare, Navid Ghavi Hossein-Zadeh, Hassan Khanzadeh, Alireza Seidavi, Vito Laudadio, Cataldo Dario, Vincenzo Tufarelli, Maria Selvaggi
Small Ruminant Research
 
3.
Estimation of genetic parameters for growth-related traits and evaluating the results of a 27-year selection program in Baluchi sheep
Mohsen Gholizadeh, Farhad Ghafouri-Kesbi
Small Ruminant Research
 
4.
Direct and maternal (co)variance components, genetic parameters, and annual trends for growth traits of Makooei sheep in Iran
Hossein Mohammadi, Mohammad Moradi Shahrebabak, Mahmood Vatankhah, Hossein Moradi Shahrebabak
Tropical Animal Health and Production
 
5.
Estimation of genetic parameters and maternal effects for body weight at different ages in D’man sheep
I. Boujenane, A. Chikhi, M. Ibnelbachyr, F.Z. Mouh
Small Ruminant Research
 
6.
Genetic analysis of growth rate and Kleiber ratio in Zandi sheep
Farhad Ghafouri-Kesbi, Mokhtar Ali Abbasi, Fazlollah Afraz, Mohammad Babaei, Hasan Baneh, Rostam Abdollahi Arpanahi
Tropical Animal Health and Production
 
7.
Estimates of genetic parameters and genetic trends for pre-weaning growth traits in Sardi sheep
I. Boujenane, I.T. Diallo
Small Ruminant Research
 
8.
Variance components and genetic parameters of growth traits and Kleiber ratio in Muzaffarnagari sheep
Ajoy Mandal, M. Karunakaran, D.K. Sharma, Hasan Baneh, P.K. Rout
Small Ruminant Research
 
9.
Genetic analysis of average daily gain in Baluchi sheep
Mohsen Gholizadeh, Farhad Ghafouri-Kesbi
Meta Gene
 
10.
Evaluation of models for estimation of genetic parameters and maternal effects for early growth traits of Iranian Baluchi sheep
M.A. Abbasi, R. Abdollahi-Arpanahi, A. Maghsoudi, R. Vaez Torshizi, A. Nejati-Javaremi
Small Ruminant Research
 
11.
Statistical models for genetic evaluation of some first kidding and lifetime traits of the Egyptian Zaraibi goats
Sherif A. Moawed, Nazem. A. Shalaby
Small Ruminant Research
 
12.
Autosomal and sex-linked (co)variance components and genetic parameters for growth traits of Iranian Zandi sheep
Ali Mohammadi, Meysam Latifi
Tropical Animal Health and Production
 
13.
Estimates of (co)variance components and genetic parameters for pre-weaning body weight traits and Kleiber ratio in Sangsari sheep breed
Jamshid Ehsaninia
Italian Journal of Animal Science
 
ISSN:1230-1388