Volume 53 (2022)
Volume 52 (2021)
Volume 51 (2020)
Volume 50 (2019)
Volume 49 (2018)
Volume 48 (2017)
Volume 47 (2016)
Volume 46 (2015)
Volume 45 (2014)
Volume 44 (2013)
Volume 43 (2012)
Volume 42 (2011)
Volume 41 (2010)
Volume 40 (2009)
Volume 39 (2009)
A comprehensive study of the prevalence of canine parvovirus (CPV-2) in Iran and ‎phylogenetic comparison of dominant Iranian CPV-types with other global types ‎based on VP2 gene ‎

Reza Faraji; Ardeshir Nejati Javaremi; Mostafa Sadeghi; Reza Miraei Ashtiani; Hamid Reza Mozhgani

Volume 52, Issue 1 , June 2021, , Pages 11-21

http://dx.doi.org/10.22059/ijas.2020.308036.653795

Abstract
  Nowadays one of the major challenges facing herders, dog owners, or working dog training centers is canine parvovirus (CPV-2). The virus has split into several types over the years since it discovered and resulted to genetic and amino acid changes that threaten a wide range of carnivorous around the ...  Read More

The effect of using cow genomic information in reference population on the accuracy ‎of genomic estimated breeding values in Iranian Holstein cattle

Mohammad Reza Mansourian; Seyed Reza Miraei Ashtiani; Ardeshir Nejati Javaremi; Mahdi Sargolzaei

Volume 51, Issue 4 , March 2021, , Pages 299-311

http://dx.doi.org/10.22059/ijas.2021.314919.653811

Abstract
  Accurate genomic evaluation depend on large reference population with reliable performance information such as predicted breeding value (PBVs). The aim of this study was to identify the most appropriate reference population to predict the genomic breeding value for Iran Holstein dairy breeding programs. ...  Read More

Genome-wide association study for milk production and somatic cell score traits in ‎Iranian Holstein cattle

Rostam Pahlavan; Mohammad Moradi Shahre Babak; Ardeshir Nejati Javaremi; Rostam Abdollahi Arpanahi

Volume 51, Issue 3 , December 2020, , Pages 221-229

http://dx.doi.org/10.22059/ijas.2020.308210.653796

Abstract
  The main objective of dairy farmers is to maximize their profit. Increased incidence of mastitis in farms is one of the health problems, causing in serious economic losses as a consequence of treatment costs and reduction of production and longevity. The objective of this study was to evaluate the genetic ...  Read More

Study of the correlation among milk production traits, its components and the breeding value of these traits with predicted methane using volatile fatty acids in Iranian Holstein cattle

Ali Jalil Sarghale; Mohammad Moradi Shahre Babak; Hossein Moradi Shahrbabak; Ardeshir Nejati Javaremi; Mahdi Saatchi

Volume 50, Issue 1 , August 2019, , Pages 1-10

http://dx.doi.org/10.22059/ijas.2017.230439.653526

Abstract
  The methane production from ruminant production system was estimated to reach 250-500 L per animal per day which has been reported to contribute up to 8-10 % of global warming during the next 50-100 years. The aim of this study was to investigate the correlation among methane emission (predicted by volatile ...  Read More

Searching causal structure among calving traits in first-parity Holstein cattles of Iran

Morteza Sattaei Mokhtari; Mohammad Moradi Shahrebabak; Ardeshir Nejati Javaremi; Guilherme J. M. Rosa

Volume 49, Issue 1 , June 2018, , Pages 1-9

http://dx.doi.org/10.22059/ijas.2017.226874.653505

Abstract
  In this research the causal structure among calving traits of 29950 first-parity Holstein cattles of Iran including calving difficulty (CD), birth weight of calves (BW) and gestation length (GL) was revealed applying data collected by Iranian Animal Breeding in 131 herds from 1995 to 2004 by Inductive ...  Read More

Impact of genotype imputation and density of markers on the accuracy of genomic prediction

Nahid Parna; Ardeshir Nejati Javaremi; Mostafa Sadeghi; Rostam Abdollahi Arpanahi

Volume 49, Issue 1 , June 2018, , Pages 73-81

http://dx.doi.org/10.22059/ijas.2018.227090.653506

Abstract
  Using SNP markers information and genomic evaluation approach, predicting the genetic merit of individuals without phenotypic records is now possible. However, using high-density panels for genomic evaluation of all individuals is not economically feasible. To achieve high genomic prediction accuracy ...  Read More

Effects of different strategies for selection of animals as reference population on the accuracy of genomic evaluation for moderate heritability traits in dairy cattle

Azade Boustan; Elham Rezvannejad; Ardeshir Nejati Javaremi; Reza Seyedsharifi

Volume 48, Issue 1 , June 2017, , Pages 1-9

http://dx.doi.org/10.22059/ijas.2017.118008.653285

Abstract
  An important question about genomic evaluation is the effectiveness of using superior animals as reference population, on the accuracy of estimated breeding values of selection candidates. In this research, the accuracy of genomic evaluation is selecting superior animals as reference population (strategy1) ...  Read More

The pattern of linkage disequilibrium in three native Iranian sheep breeds

Somayeh Barani; Mohammad Moradi-Shahrbabak; Ardeshir Nejati-Javaremi; Mohammad Hosein Moradi; Mohsen Gholizadeh; Majid Khansefid

Volume 48, Issue 1 , June 2017, , Pages 11-18

http://dx.doi.org/10.22059/ijas.2017.221876.653485

Abstract
  Understanding the pattern of linkage disequilibrium (LD) in different populations provides useful information for genomic selection (GS), genome wide association studies (GWAS) and identification of genetic architecture of traits by estimating the persistence of LD phase between markers and quantitative ...  Read More

Genome-wide evaluation of effective population size in some Iranian sheep breeds using linkage disequilibrium information

Mohammad Hossein Moradi; Amir Hossein Farahani; Ardeshir Nejati-Javaremi

Volume 48, Issue 1 , June 2017, , Pages 39-49

http://dx.doi.org/10.22059/ijas.2017.213736.653464

Abstract
  The aim of the present study was to estimate the effective population size (Ne) in some Iranian sheep breeds using genome wide SNP data. A total of 217 animal samples consisting of 45, 37, 34, 35, 45 and 11 samples from Zel, Afshari, Moghani, Qezel, Lori-Bakhtiari and a wild-type of Iranian sheep breeds, ...  Read More

A Study of the Effect of Using Dense Markers Close to the Known Loci of Trait Affecting Genes on Genomic Evaluation Accuracy

Azadeh BOOSTAN; Ardeshir NEJATI-JAVAREMI; Mahammad MORADI SHAHRBABAK; Mehdi SAATCHI

Volume 44, Issue 1 , June 2015, , Pages 53-60

http://dx.doi.org/10.22059/ijas.2013.32131

Abstract
  Throughout the present study the effect of using markers close to genes affecting a trait, ascompared with the use of all the markers of a genome, and also the effect of on increase in thenumber of reference groups, on the accuracy of a genetic evaluation, was investigated. Genomicevaluation was done ...  Read More

A Study of the Relationship between TLR4 Gene and Clinical Mastitis in Holstein Dairy Cows in Iran

M. BAGHERI; R MIRAIE- ASHTIANI; M MORADI-SHAHRBABAK; A PAKDEL; A NEJATI-JAVAREMI

Volume 44, Issue 2 , August 2013, , Pages 141-148

http://dx.doi.org/10.22059/ijas.2013.35563

Abstract
  The Toll-like Receptor 4 (TLR4) is an innate immune protein on cell surfaces that identifies Lipopolysaccharide (LPS) of gram-negative bacteria. Genetic markers associated with innate responses during mastitis could help in selection of cattle to improve disease resistance. The objective of this study ...  Read More

Economic Aspects of Mature Body Weight and Age at First Calving in Holstein Dairy Cattle of Iran

ali sadeghi; mohamad moradi shahre babak; ardashir nejati javaremi; seyed reza mirayi ashtiani; piter arimer; temti jan bern; mahdi taghi nejad

Volume 43, Issue 2 , September 2012, , Pages 269-278

http://dx.doi.org/10.22059/ijas.2012.28535

Abstract
  The aim followed in the present study was to investigate the economic aspects of , and to derive Economic Weights (EWs) for Mature Body Weight (MBW) as well as for age at First Calving (AFC) in Holstein dairy cattle of Iran. Economic values (EVs) for traits were estimated using trait-by-trait bio-economic ...  Read More

Using Principal Components of the Additive Genetic Random Regression Coefficients Matrix to Modify Lactation Curve of Holstein Dairy Cattle in Iran

hossein mehrabn; ardashiri nejati; seyed reza mirayi ashtiani; hasan mehrbani yegane; venolia ibanz

Volume 43, Issue 1 , June 2012, , Pages 123-130

http://dx.doi.org/10.22059/ijas.2012.24916

Abstract
  The objective of this study was to investigate the effect of principal components (PC) of the regression coefficients (co)variance matrix on the lactation curve, and on the formation of selection index to modify the curve, based on these PC’s, and as well to estimate additive genetic and phenotypic ...  Read More

Estimation of Economic Values and Financial Losses Associated with Dystocia for Holstein Dairy Cattle of Iran

Ali Sadeghi-Sefidmazgi; Mohammad Moradi Shahrbabak; Ardeshir Nejati Javaremi; Seyed Reza Miraei Ashtiyani; P. R. Eymer

Volume 42, Issue 4 , March 2012, , Pages 345-353

Abstract
  The financial losses, absolute and net economic values (EVs) for direct (DCD) and Maternal Calving Difficulty (MCD) were estimated using a bioeconomic model and taking into account the categorical nature of the trait. The effects of dystocia on other traits were estimated. But because of low reliability ...  Read More

A Study of The Effect of Individual and Family Selection on the Increase Body and Breast Weights in Japanese Quail

m. khaldari; a. pakdel; h. mehrbani yeganeh; ardeshir nejati

Volume 43, Issue 4 , February 2012, , Pages 531-537

http://dx.doi.org/10.22059/ijas.2013.30274

Abstract
  The current study was conducted to investigate the effect of short-term selection in Japanese quail for its 4-week body and breast weights. Two selected lines, one for selection of body weight based upon in. breeding values (line 1) and another for breast weight based on between family selections (line ...  Read More

Estimation of Genetic Parameters for Test Day Records of Milk Yield in Holstein Dairy cattle of Iran

Mohammad Razmkabir; Mohammad Moradi Shahrbabak; Abbas Pakdel; Ardeshir Nejati Javaremi

Volume 42, Issue 2 , October 2011, , Pages 171-178

Abstract
  Test day records of first lactation Holstein cows from 1996 to 2008 were obtained from Animal Breeding Center of Iran and used in this research. Data consisted of 872125 test-day milk records of 95816 cows from 59 herds. (Co)Variance components and genetic parameters were estimated using random regression ...  Read More

Effect of Calving Difficulty on Milk Production, Fertility and Estimation of Economic Value for Direct and Maternal Calving Difficulties

Heydar Ghiasi; Ardeshir Nejati javaremi; Abbas Pakdel; Hassan Mehrbani yeganeh

Volume 42, Issue 1 , July 2011, , Pages 57-64

Abstract
  Economic data and performance records from 10 Iranian Holstein dairy cattle herds, as well as milk production and fertility records from Iranian Center of Animal Breeding and Animal Production Improvment were used to estimate the effect of calving difficulty on milk production, fertility and as well ...  Read More

An Estimation of the Response to Selection, and Realized Heritability for Four and Five Weeks of Age Body Weight in Japanese Quail

Homa Arabi; Mohammad Moradi Shahrbabak; Ardeshir Nejati Javaromi

Volume 41, Issue 4 , March 2011, , Pages 373-380

Abstract
  In the present research, divergent selection for Japanese quail body weight at four and five weeks of age was performed in five generations to estimate the response to selection and realized heritability. The average body weight was significantly (p  Read More

An Estimation of Discounted Genetic Expressions of Dairy Traits in Iranian Holstein Herds

Ali Sadeghi Sefidmazgi; Ardeshir Nejati-Javaremi; Mohammad Moradi-Shahrbabak; Seyed Reza Miraei Ashtiani; Peter R AYMER

Volume 42, Issue 3 , January 2011, , Pages 189-197

Abstract
  The objective of this study was to assess the Discounted Genetic Expressions (DGEs) for different categories of animal traits as regards Holstein cattle of Iran. Using discounted gene-flow principles, DGEs per calf born were estimated for self replacing females and also for their sires. In the situation ...  Read More

Economic Values of Reproduction, Growth and Carcass Composition Traits in Lori-Bakhtiari Sheep

MohammadAli Talebi; Seyed Reza Miraei Ashtiani; Mohammad Moradi Shahrbabak; Ardeshir Nejati Javaromi

Volume 41, Issue 3 , December 2010, , Pages 203-210

Abstract
  In this study, production, reproduction, managerial, and economic parameters obtained from data recorded for Lori-Bakhtiari flock of sheep (500 heads of breeding ewe) stationed at the sheep's Breeding Station, were employed to determine the relative economic values of and breeding objectives for an annual ...  Read More

The Feasibility of Nonlinear Models to Describe the Milk Somatic Cell Score of Iranian Holstein Cows throughout Different Lactation Periods

Abbas Pakdel; Marziyeh Heydari Tabar; Ardeshir Nejati Javaromi

Volume 41, Issue 2 , September 2010

Abstract
  The main objective of the present study was to explore the feasibility of nonlinear mixed models to describe the Somatic Cell Score (SCS) lactation curves and to compare the fit of four nonlinear vs. two linear models when applied to SCS lactation records in Iranian Holstein cows. The Animal Breeding ...  Read More

A Comparison of Different Functions for the Description of Lactation Curve in Different Periods of Lactation of Holstein Cows using Test Day Records

Azadeh Boustan; Mohamad Moradi ShahrBabak; Ardeshir Nejati Javaromi

Volume 41, Issue 1 , May 2010

Abstract
  Test day milk records of a Holstein dairy farm collected during years 2004 to 2006 on 142 cows in the 1st lactation vs. 140 cows in the 2nd lactation were used in this research. There were real milk yields of cows available in each part of lactation in this farm making it possible to compare functions ...  Read More

Effect of Rapeseed Oil on Performance and Carcass Characteristics of Holstein Male Calves

mehdi eftekhari; kamran rezayazdi; ali nikkhah; ardeshir nejati javaremi

Volume 40, Issue 2 , September 2009

Abstract
  Twenty-four Holstein male calves (BW=217±57kg) were employed to evaluate the effects of rapeseed oil supplementation on growth, carcass as well as on meat quality and fatty acid content of longissimus thoracis muscle in a completely randomized design. The calves were divided into three groups and allocated ...  Read More

The Effect of Adjustment for Production Trait Records on Estimation of Variance Components and Genetic Evaluation in Iranian Holstein Cattle

bakhtiyar amini; mohammad moradi shahr babak; ardeshir nejati javaremi; mohammad bagher sayad nejad

Volume 40, Issue 2 , September 2009

Abstract
  Adjusted milk yield for 305 days and two milking times along with actual first lactation records of 187138 Holstein cows were used to find out the effect of record adjustment on variance components estimation and on genetic evaluation. Records had been gathered by the Animal Breeding Center of Iran during ...  Read More

Effects of Monensin and Propylene Glycol on Milk Production, Milk Composition and some Blood Metabolites in Holstein Lactating Cows

heshmat-o-lah bahrami yekdangi; kamran rezayazdi; mehdi dehghan banadaki; ardeshir nejati javaremi

Volume 40, Issue 2 , September 2009

Abstract
  The effects of Monesin and propylene glycol on feed intake, milk production, and composition as well as some blood metabolites of 16 primiparous and multiparous Holstein lactating cows (60±30 Days In Milk (DIM), milk production of 33±3 Kg/day) were evaluated. Cows were experimentally in a arranged ...  Read More