List of Articles محمود وطن خواه

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  1 - Phenotypic and Genetic Analysis of Lori-Bakhtiari Lamb's Longevity Up to Yearling Age for Autosomal and Sex-Linked Chromosomes
  آ. سالمی م. وطن خواه ب. اسدی
  The data set used in this study contained 8793 records of lamb's longevity (days) from 320 sires and 2349 dams collected during 1989 to 2014, from the Lori-Bakhtiari flock at Shooli station in Shahrekord, Iran. Genetic parameters (partitioned into autosomal, sex-linked More

  The data set used in this study contained 8793 records of lamb's longevity (days) from 320 sires and 2349 dams collected during 1989 to 2014, from the Lori-Bakhtiari flock at Shooli station in Shahrekord, Iran. Genetic parameters (partitioned into autosomal, sex-linked and maternal) and breeding values of cumulative lamb's longevity from birth up to yearling age (at 1, 2, 3, 6, 9 and 12 months) were estimated using restricted maximum likelihood procedure. The results showed that the overall mean of the cumulative longevity of lamb up to yearling (12 months of age) was 295.87 days. The effect of fixed factors; year and month of birth, sex of lamb, age of dam, lamb birth weight as quadratic covariate and dam body weight as linear covariate were significant (P<0.05) on lamb's longevity. The heritability estimates of lamb's longevity were low and ranged from 0.01 to 0.08 for autosomal, 0.01 for sex-linked and 0.02 to 0.03 for maternal additive genetic effects. The estimates of autosomal, sex-linked and maternal genetic correlations of lamb's longevity in different ages were high. The pearson and spearman correlation coefficients between autosomal breeding values and sex-linked breeding values in lamb's longevity at different ages were 0.15 to 0.46 and 0.11 to 0.43 respectively. Thus, lamb's longevity up to yearling can be improved by farm management practices and improving environmental factors at first. Genetic analysis using linear models which able to estimate breeding values in direct (autosomal and sex-linked chromosomes separately) and maternal effects, could be more effective to improve longevity in lambs. Manuscript profile
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  2 - Phenotypic and Genetic Analysis of Lori-Bakhtiari Lamb's Weight at Different Ages for Autosomal and Sex-Linked Genetic Effects
  م. مراونی م. وطن‌خواه س. عیدی‌وندی
  The data set used in this study contained 8793 records of lamb's weight (kg) from 320 sires and 2349 dams collected during 1989 to 2014 from the Lori-Bakhtiari flock at Shooli station in Shahrekord, Iran. Non-genetic factors and genetic parameters (partitioned into auto More

  The data set used in this study contained 8793 records of lamb's weight (kg) from 320 sires and 2349 dams collected during 1989 to 2014 from the Lori-Bakhtiari flock at Shooli station in Shahrekord, Iran. Non-genetic factors and genetic parameters (partitioned into autosomal, sex-linked and maternal) of lamb's weight at different ages were estimated using without and with sex-linked genetic effects models. The results showed that the overall mean of lamb’s weight were 5.01, 28.93, 41.42, 51.33 and 56.52 kg at birth, weaning, 6, 9 and 12 months of age, respectively. The effect of fixed factors; year and month of birth, age of dam, sex of lamb, type of birth; dam body weight and age of lamb (days) as linear covariate were significant (P Manuscript profile
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  3 - Economic Opportunity Survey of Small Dairy Farms in the Southwest Part of Iran
  M. Vatankhah M. Faraji A.A. Gharadaghi A.R. Aghashahi
  In this study 495 smallholder dairy farms in 52 villages of different township in southwestern province of Iran (Chaharmohal and Bakhtiari province) included 1321 lactating cows and 2811 total mature cows (lactating and dry) during winter 2009 to summer 2010 were used t More

  In this study 495 smallholder dairy farms in 52 villages of different township in southwestern province of Iran (Chaharmohal and Bakhtiari province) included 1321 lactating cows and 2811 total mature cows (lactating and dry) during winter 2009 to summer 2010 were used to estimate economic opportunities insmallholder dairy farms. Questionnaire survey was used to collect data from last year information, recorded information, direct recording during visit the farm and interview with the small holder farmers. The economic opportunity is the amount of additional revenue that could be obtained if farmers could improve various productivity indexes to meet reasonable targets. The total of economic opportunities per farm per year estimated as 2009.68 US $ included 1354.85 US $ (57.94% total) for average daily milk produce per cow, 475.52 US $ (26.07% total) for average lactation length, 75.04 US $ (4.00% total) for average age at first calving, 37.52 US $ (8.98% total) for average calf production interval and 66.75 US $ (3.00% total) for average calf mortality, respectively. The considerable variation observed for economic opportunities, percent of total and total of economic opportunities in different townships, seasons, breeds and size of herds. Thus, increasing the average daily milk production per cow and averagelactation length, as well as decreasing average age at first calving and average calf production interval could affect profit and productivity. Manuscript profile
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  4 - Phenotypic and Genetic Factors Affecting on Reproductive Lifetime of Lori-Bakhtiari Ewes
  م. وطن خواه
  In this study phenotypic and genetic factors affecting the reproductive efficiency of Lori-Bakhtiari ewes were determined using 8202 reproductive records of 2478 ewes collected at Shooli research station in the southwestern part of Iran (Shahrekord) during 1989 to 2012. More

  In this study phenotypic and genetic factors affecting the reproductive efficiency of Lori-Bakhtiari ewes were determined using 8202 reproductive records of 2478 ewes collected at Shooli research station in the southwestern part of Iran (Shahrekord) during 1989 to 2012. Reproductive efficiency over all consecutive lambing opportunities were calculated by adding the total reproductive efficiency traits per ewe joined for all of the parturition opportunities. Reproductive traits included in the current study were: number of parity (NP), total number of lambs born (TNLB), total number of lambs weaned (TNLW), total of lambs birth weight (TLBW), total of lambs weaning weight (TLWW), total of lambs weaning weight per kg ewe body weight (TLWW/EBW) and total of lambs weaning weight per kg metabolic ewe body weight (TLWW/MEBW). The data set analyzed with multi-trait animal model included the fixed effects of birth year of ewe, number of parturition in ewe's lifetime, ewe body weight as covariate and random effects direct additive genetic and residual. The overall mean of NP, TNLB, TNLW, TLBW, TLWW, TLWW/EBW and TLWW/MEBW were 3.31, 3.31, 3.21, 16.51 kg, 87.31 kg, 1.51 and 4.16, respectively. The effect of non-genetic factors were significant for all investigated traits in this study (P<0.01). The heritability estimates were medium (0.30) for NP and low (0.08 to 0.11) for other reproductive efficiency traits. The estimates of genetic and phenotypic correlations between the traits were high (0.72 to 0.99) or medium to high (0.57 to 0.99). Thus, improving environmental effects could make significant improvements in reproductive efficiency traits at first. The low to medium heritability estimate and high genetic correlations obtained between reproductive efficiency traits in ewe's lifetime and high phenotypic standard deviation from them indicated that improvement by selection of all of traits, especially NP can be improved TLWW as net reproductive efficiency trait in Lori-Bakhtiari ewes. Manuscript profile
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  5 - Defining Economic Values of Important Traits in One Hump Camel in Desert Areas Rearing System
  م. وطن خواه ع. شفیع نادری م.ر. مفیدی ع.ا. قره داغی م.ع. عباسی
  In this study production, reproduction, population, management and economic parameters resulted from recording of 7 flocks with size 57 to 400 and 721 heads of camels in a cycle of reproduction, during three years from 2011 to 2013 were used to find out of the economic More

  In this study production, reproduction, population, management and economic parameters resulted from recording of 7 flocks with size 57 to 400 and 721 heads of camels in a cycle of reproduction, during three years from 2011 to 2013 were used to find out of the economic values of important traits in one hump camel in desert areas rearing system. The economic traits that appeared in profit equation were durability, reproduction and production traits. The economic values, economic weights and the relative importance of traits estimated by increasing one unit and one genetic standard deviation of each trait, using maximizing profit, maximizing efficiency and minimizing cost situations. The results showed that from total annual revenue in each camel (294.10 US$), 66% accounted for sale of calf and 34% resulted from the sale of culling camels. The total annual cost in each camel (72.95 US$), feed, labour and management, facilities, drug and treatment and interest of investment accounted by 40.23%, 34.49%, 7.18%, 1.42% and 16.67%, respectively. The average annual profit and profit to cost ratio in each camel were equal to 221.15 US$ and 3.03, respectively. Relative importance of different group of traits for average of the herds were 58.44% for durability traits (survival rate in camel 14.31%, survival rate in calf to weaning age 34.74% and longevity of camel 9.39%), 24.33% for reproduction traits (conception rate 14.31%, calving interval -8.99%, and age at first calving -1.03%) and 17.23% for production traits (calf weaning weight 13.60%, weight of female replacement -1.09% and weight of camel 2.53%). Relative importance of durability traits resulted from maximizing efficiency and minimizing cost decrease steadily and added to the relative importance of reproduction and production traits. The estimated relative importance of different traits got in this study, could be used to form multiple trait selection indices to one hump camel breeding programs in desert areas rearing system. Manuscript profile
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  6 - Relationship between Immunoglobulin Concentrations in the Ewe's Serum and Colostrum, and Lamb's Serum in Lori-Bakhtiari Sheep
  M. Vatankhah
  In this study 71 head of conceiving ewe and their progeny (91 head) from the flock of Lori-Bakhtiari sheep (360 head), in Sholi Station were randomly selected to determine the relationship between the immunoglobulin (IgG) concentration in the ewe's serum and colostrum, More

  In this study 71 head of conceiving ewe and their progeny (91 head) from the flock of Lori-Bakhtiari sheep (360 head), in Sholi Station were randomly selected to determine the relationship between the immunoglobulin (IgG) concentration in the ewe's serum and colostrum, and lamb's serum. Ewe blood sample, colostrum of ewe and blood of the lamb was taken 2 weeks before parturition, 1 to 8 hours after parturition and 36 hours after birth of lamb, respectively. The serum of samples was extracted and then IgG (mg/mL) was measured in samples based on single radial immunodiffusion test and total serum protein (gr/L) based on quantitative zinc sulfate turbidity method. Results showed that the overall mean of IgG were 21.33, 48.48 and 7.86 mg/mL for blood serum of ewe, serum colostrum of ewe and blood serum of the lamb and total serum protein were 71.98, 114.48 and 65.77 g/L, respectively. The effects of age of ewe, type of parturition, gender of lamb, body condition score and body weight of ewe on considered immunity traits were not significant (P>0.05). The correlation coefficients between IgG in serum of blood and serum of colostrum in ewe and serum of blood in lamb were medium to high (0.35 to 0.75) and significant (P<0.05). The regression coefficients of IgG concentration in lamb's serum on values in ewe's serum at 2 weeks before parturition was highly significant (P<0.01) and shows that IgG content in lamb's serum increase by 0.18 units per increasing one unit in IgG content in ewe's serum. Therefore, the level of IgG in lamb's serum could be affected by the IgG concentrations in ewe’s serum and colostrum. Also, the level of IgG in lamb's serum could be enhanced by improving the level of IgG concentration in ewe's serum at two weeks before lambing. Manuscript profile