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Abbas Safari Navid Ghavi Hossein-Zadeh Abdol Ahad Shadparvar Rostam Abdollahi Arpanahi 《Tropical animal health and production》2018,50(4):707-714
The aim of current study was to review breeding progress and update information on genetic strategies in Iranian buffaloes. Iranian buffalo is one of the vital domestic animals throughout north, north-west, south and south-west of Iran with measurable characteristics both in milk and meat production. The species plays an important role in rural economy of the country due to its unique characteristics such as resistance to diseases and parasites, having long productive lifespan and showing higher capability of consuming low-quality forage. In Iran, total production of milk and meat devoted to buffaloes are 293,000 and 24,700 tons, respectively. Selection activities and milk yield recording are carrying out by the central government through the Animal Breeding Centre of Iran. The main breeding activities of Iranian buffaloes included the estimation of genetic parameters and genetic trends for performance traits using different models and methods, estimation of economic values and selection criteria and analysis of population structure. Incorporating different aspects of dairy buffalo management together with improved housing, nutrition, breeding and milking, is known to produce significant improvements in buffalo production. Therefore, identifying genetic potential of Iranian buffaloes, selection of superior breeds, improving nutritional management and reproduction and developing the education and increasing the skills of practical breeders can be useful in order to enhance the performance and profitability of Iranian buffaloes. 相似文献
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Hesam Amou Posht-e- Masari Abdol Ahad Shadparvar Navid Ghavi Hossein-Zadeh Mohammad Hossein Hadi Tavatori 《Tropical animal health and production》2013,45(5):1259-1263
The objective of this study was to estimate genetic parameters for reproductive traits in Shall sheep. Data included 1,316 records on reproductive performances of 395 Shall ewes from 41 sires and 136 dams which were collected from 2001 to 2007 in Shall breeding station in Qazvin province at the Northwest of Iran. Studied traits were litter size at birth (LSB), litter size at weaning (LSW), litter mean weight per lamb born (LMWLB), litter mean weight per lamb weaned (LMWLW), total litter weight at birth (TLWB), and total litter weight at weaning (TLWW). Test of significance to include fixed effects in the statistical model was performed using the general linear model procedure of SAS. The effects of lambing year and ewe age at lambing were significant (P?<?0.05). Genetic parameters were estimated using restricted maximum likelihood procedure, under repeatability animal models. Direct heritability estimates were 0.02, 0.01, 0.47, 0.40, 0.15, and 0.03 for LSB, LSW, LMWLB, LMWLW, TLWB, and TLWW, respectively, and corresponding repeatabilities were 0.02, 0.01, 0.73, 0.41, 0.27, and 0.03. Genetic correlation estimates between traits ranged from ?0.99 for LSW–LMWLW to 0.99 for LSB–TLWB, LSW–TLWB, and LSW–TLWW. Phenotypic correlations ranged from ?0.71 for LSB–LMWLW to 0.98 for LSB–TLWW and environmental correlations ranged from ?0.89 for LSB–LMWLW to 0.99 for LSB–TLWW. Results showed that the highest heritability estimates were for LMWLB and LMWLW suggesting that direct selection based on these traits could be effective. Also, strong positive genetic correlations of LMWLB and LMWLW with other traits may improve meat production efficiency in Shall sheep. 相似文献
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1. The objectives of the current study were to investigate the effect of incidence rate (5%, 10%, 20%, 30% and 50%) of ascites syndrome on the expression of genetic characteristics for body weight at 5 weeks of age (BW5) and AS and to compare different methods of genetic parameter estimation for these traits.2. Based on stochastic simulation, a population with discrete generations was created in which random mating was used for 10 generations. Two methods of restricted maximum likelihood and Bayesian approach via Gibbs sampling were used for the estimation of genetic parameters. A bivariate model including maternal effects was used. The root mean square error for direct heritabilities was also calculated.3. The results showed that when incidence rates of ascites increased from 5% to 30%, the heritability of AS increased from 0.013 and 0.005 to 0.110 and 0.162 for linear and threshold models, respectively.4. Maternal effects were significant for both BW5 and AS. Genetic correlations were decreased by increasing incidence rates of ascites in the population from 0.678 and 0.587 at 5% level of ascites to 0.393 and ?0.260 at 50% occurrence for linear and threshold models, respectively.5. The RMSE of direct heritability from true values for BW5 was greater based on a linear-threshold model compared with the linear model of analysis (0.0092 vs. 0.0015). The RMSE of direct heritability from true values for AS was greater based on a linear-linear model (1.21 vs. 1.14).6. In order to rank birds for ascites incidence, it is recommended to use a threshold model because it resulted in higher heritability estimates compared with the linear model and that BW5 could be one of the main components of selection goals. 相似文献
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Hajar Eftekhari Babs Surujlal Vahid Shadparvar 《Journal Of Agricultural & Food Information》2013,14(4):274-289
The aim of this study was to identify rice supervising agents' educational needs in the field of multifunctional agriculture in Guilan Province, Iran. The statistical population included rice supervising agents in Guilan Province in 2014 (N = 169), of which 106 people were randomly sampled. The data collection tool was a research-designed questionnaire which was filled out by respondents using the self-reporting method. Results showed that among production functions of agriculture, rice supervising agents had a high need to be trained in the functions of “the production of raw material for rural handicrafts,” “the production of animal feed,” and “the production of medicinal herbs for medical and pharmaceutical purposes.” Participants' needs for training in nonproduction functions of agriculture were ranked by the Friedman test; results indicated a great need for education in the environmental functions of agriculture and a lesser need for education in its economic functions. 相似文献
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Safari Abbas Shadparvar Abdol Ahad Ghavi Hossein-Zadeh Navid Abdollahi-Arpanahi Rostam 《Tropical animal health and production》2019,51(5):1209-1214
Tropical Animal Health and Production - Iranian buffalo plays a critical role in supplying a portion of the income and the necessities of the rural population. The first step to design a breeding... 相似文献
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Amirshaghaghi A Ghabili K Shoja MM Kooshavar H 《Pakistan journal of biological sciences: PJBS》2008,11(6):942-945
The present study was conducted on a group of Iranian mothers with icteric newborn in order to identify any wrong knowledge and improper practices related to the neonatal jaundice. Such an estimate of knowledge and practices of mothers may be required for implementing the educational programs on which the preventive measures of kernicterus are principally thought to be depended. Between June 2004 and February 2007, 1666 mothers with icteric newborn hospitalized at a single center were enrolled. A questionnaire was used to assess the participants' knowledge and practice of neonatal jaundice. A knowledge score was calculated based on the responses. The mean knowledge score was 3.38 +/- 1.23 (out of 6). About 77% of the mothers had moderate-to-high level of knowledge of neonatal jaundice. Approximately one-third of the mothers consulted a physician within 24 h of appearance of jaundice and 13.8% declared that they waited and managed their children with traditional remedies until they sought medical advices. Furthermore, 32.2% of the mothers discontinued feeding their icteric offspring with colored foods and colostrums. Hence, 42.8% of the mothers acted weakly with regard to their icteric offspring. The health care workers were the participants' major source of information about neonatal jaundice. The present study determined a fairly adequate knowledge of Iranian mothers about the neonatal jaundice with incomparable level of related practices. The findings of this study should be considered seriously by the local health centers and the medical professionals to provide consistent information about jaundice and its causes for the parents. 相似文献
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Maryam Shekari Kayvan Etebari Abdolahad Shadparvar 《Pesticide biochemistry and physiology》2008,91(1):66-74
Methanolic extract of Artemisia annua L., a weed collected around paddy fields in north of Iran, was investigated for its toxic effects on: feeding, growth, fecundity, fertility including the biochemical characteristics of elm leaf beetle Xanthogaleruca luteola Mull. The toxicity tests indicate that insecticidal effect was 2.4-fold higher in 3rd instar larvae than in adults. The LC50 was 48% and 43.77% of a methanolic leaf extract at 24 and 48 h, respectively. The feeding deterrence was highest at 10% concentration and lowest at 0.625% for 3rd instar larvae and adults during the first 24 h and decreased thereafter. Larval duration significantly increased at higher concentrations. Larval treatment with 10% methanolic extract resulted in deformed adults (adultoids) with drastic changes in gross morphology of female reproductive system. Food digestion and assimilation significantly decreased in adults. Larval duration and adult fecundity and fertility were also significantly reduced. Twenty-four hours after treating 3rd instar larva with the extract the levels of glucose, protein, urea, uric acid, α-amylase, alkaline phosphatase, alanine amino transferase and aspartate amino transferase significantly changed. However, at 48 h the extract lost its potency. The extract did not effect the level of cholesterol in treated larva. These results indicate that Artemisia annua L. extract contains inhibitors of key metabolic pathways that may be useful in future control of the elm leaf beetle. 相似文献
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