The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Saeid Naderi - One of the best experts on this subject based on the ideXlab platform.
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large scale mitochondrial dna analysis of the Domestic Goat reveals six haplogroups with high diversity
PLOS ONE, 2007Co-Authors: Saeid Naderi, Hamid Reza Rezaei, Pierre Taberlet, Stephanie Zundel, Seyedabbas Rafat, Hamidreza Naghash, Mohamed A A Elbarody, O ErtugrulAbstract:Background. From the beginning of Domestication, the transportation of Domestic animals resulted in genetic and demographic processes that explain their present distribution and genetic structure. Thus studying the present genetic diversity helps to better understand the history of Domestic species. Methodology/Principal Findings. The genetic diversity of Domestic Goats has been characterized with 2430 individuals from all over the old world, including 946 new individuals from regions poorly studied until now (mainly the Fertile Crescent). These individuals represented 1540 haplotypes for the HVI segment of the mitochondrial DNA (mtDNA) control region. This large-scale study allowed the establishment of a clear nomenclature of the Goat maternal haplogroups. Only five of the six previously defined groups of haplotypes were divergent enough to be considered as different haplogroups. Moreover a new mitochondrial group has been localized around the Fertile Crescent. All groups showed very high haplotype diversity. Most of this diversity was distributed among groups and within geographic regions. The weak geographic structure may result from the worldwide distribution of the dominant A haplogroup (more than 90% of the individuals). The large-scale distribution of other haplogroups (except one), may be related to human migration. The recent fragmentation of local Goat populations into discrete breeds is not detectable with mitochondrial markers. The estimation of demographic parameters from mismatch analyses showed that all groups had a recent demographic expansion corresponding roughly to the period when Domestication took place. But even with a large data set it remains difficult to give relative dates of expansion for different haplogroups because of large confidence intervals. Conclusions/Significance. We propose standard criteria for the definition of the different haplogroups based on the result of mismatch analysis and on the use of sequences of reference. Such a method could be also applied for clarifying the nomenclature of mitochondrial haplogroups in other Domestic species.
O Ertugrul - One of the best experts on this subject based on the ideXlab platform.
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large scale mitochondrial dna analysis of the Domestic Goat reveals six haplogroups with high diversity
PLOS ONE, 2007Co-Authors: Saeid Naderi, Hamid Reza Rezaei, Pierre Taberlet, Stephanie Zundel, Seyedabbas Rafat, Hamidreza Naghash, Mohamed A A Elbarody, O ErtugrulAbstract:Background. From the beginning of Domestication, the transportation of Domestic animals resulted in genetic and demographic processes that explain their present distribution and genetic structure. Thus studying the present genetic diversity helps to better understand the history of Domestic species. Methodology/Principal Findings. The genetic diversity of Domestic Goats has been characterized with 2430 individuals from all over the old world, including 946 new individuals from regions poorly studied until now (mainly the Fertile Crescent). These individuals represented 1540 haplotypes for the HVI segment of the mitochondrial DNA (mtDNA) control region. This large-scale study allowed the establishment of a clear nomenclature of the Goat maternal haplogroups. Only five of the six previously defined groups of haplotypes were divergent enough to be considered as different haplogroups. Moreover a new mitochondrial group has been localized around the Fertile Crescent. All groups showed very high haplotype diversity. Most of this diversity was distributed among groups and within geographic regions. The weak geographic structure may result from the worldwide distribution of the dominant A haplogroup (more than 90% of the individuals). The large-scale distribution of other haplogroups (except one), may be related to human migration. The recent fragmentation of local Goat populations into discrete breeds is not detectable with mitochondrial markers. The estimation of demographic parameters from mismatch analyses showed that all groups had a recent demographic expansion corresponding roughly to the period when Domestication took place. But even with a large data set it remains difficult to give relative dates of expansion for different haplogroups because of large confidence intervals. Conclusions/Significance. We propose standard criteria for the definition of the different haplogroups based on the result of mismatch analysis and on the use of sequences of reference. Such a method could be also applied for clarifying the nomenclature of mitochondrial haplogroups in other Domestic species.
Hamid Reza Rezaei - One of the best experts on this subject based on the ideXlab platform.
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large scale mitochondrial dna analysis of the Domestic Goat reveals six haplogroups with high diversity
PLOS ONE, 2007Co-Authors: Saeid Naderi, Hamid Reza Rezaei, Pierre Taberlet, Stephanie Zundel, Seyedabbas Rafat, Hamidreza Naghash, Mohamed A A Elbarody, O ErtugrulAbstract:Background. From the beginning of Domestication, the transportation of Domestic animals resulted in genetic and demographic processes that explain their present distribution and genetic structure. Thus studying the present genetic diversity helps to better understand the history of Domestic species. Methodology/Principal Findings. The genetic diversity of Domestic Goats has been characterized with 2430 individuals from all over the old world, including 946 new individuals from regions poorly studied until now (mainly the Fertile Crescent). These individuals represented 1540 haplotypes for the HVI segment of the mitochondrial DNA (mtDNA) control region. This large-scale study allowed the establishment of a clear nomenclature of the Goat maternal haplogroups. Only five of the six previously defined groups of haplotypes were divergent enough to be considered as different haplogroups. Moreover a new mitochondrial group has been localized around the Fertile Crescent. All groups showed very high haplotype diversity. Most of this diversity was distributed among groups and within geographic regions. The weak geographic structure may result from the worldwide distribution of the dominant A haplogroup (more than 90% of the individuals). The large-scale distribution of other haplogroups (except one), may be related to human migration. The recent fragmentation of local Goat populations into discrete breeds is not detectable with mitochondrial markers. The estimation of demographic parameters from mismatch analyses showed that all groups had a recent demographic expansion corresponding roughly to the period when Domestication took place. But even with a large data set it remains difficult to give relative dates of expansion for different haplogroups because of large confidence intervals. Conclusions/Significance. We propose standard criteria for the definition of the different haplogroups based on the result of mismatch analysis and on the use of sequences of reference. Such a method could be also applied for clarifying the nomenclature of mitochondrial haplogroups in other Domestic species.
B A Dehority - One of the best experts on this subject based on the ideXlab platform.
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rumen ciliate protozoa of Domestic sheep ovis aries and Goat capra aegagrus hircus in kyrgyzstan
Fems Microbiology Letters, 2016Co-Authors: Gozde Gurelli, Savas Canbulat, Nurbek Aldayarov, B A DehorityAbstract:Species composition and concentration of rumen ciliate protozoa were investigated in the rumen contents of 14 Domestic sheep and 1 Goat living in Bishkek, Kyrgyzstan. This is the first report on rumen ciliates from ruminants living in Kyrgyzstan. In sheep 12 genera, 28 species and 12 morphotypes were detected, whereas in Goat 8 genera, 12 species and 4 morphotypes were detected. The density of ciliates in sheep was (28.1 ± 20.0) × 104 cells mL−1 and in Goat was 37.0 × 104 cells mL−1. Dasytricha ruminantium, Isotricha prostoma, Entodinium simulans and Ophryoscolex caudatus were major species (100%) in sheep, and for the first time, Diplodinium rangiferi was detected in a Domestic Goat.
S Lagaye - One of the best experts on this subject based on the ideXlab platform.
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endogenous jsrv like proviruses in Domestic cattle analysis of sequences and transcripts
Virology, 2007Co-Authors: V. A. Morozov, S Lagaye, A V MorozovAbstract:Abstract Jaagsiekte retrovirus is an exogenous (exJSRV) beta-retrovirus with a simple genome. It causes lower airway epithelial cell tumors in small ruminants. Endogenous (enJSRV) counterparts of exJSRV are present in different copy numbers in numerous Bovidae family members. This work has focused on enJSRV in Simmental (Germany) and Limousine (France) beef breeds of Domestic cattle and Domestic Goat. Of the enJSRV sequences in cattle, the orf-x sequences were about 99% identical, the LTR sequences were about 97% identical and the env sequences were nearly 95% identical to the corresponding endogenous sequences in sheep. A significant polymorphism of the proviral sequences between the cattle breeds was noted. Clonal analyses of the amplicons suggest two enJSRV proviruses in cattle genome. The endogenous sequences revealed in Goat were closer to enzootic nasal tumor virus (ENTV) from Goat rather than to enJSRV from sheep. The expression of enJSRV in cattle was partial ( env only) and detected exclusively in bone marrow.