The Experts below are selected from a list of 252 Experts worldwide ranked by ideXlab platform
James N Derr - One of the best experts on this subject based on the ideXlab platform.
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detection of mitochondrial dna from Domestic Cattle in bison on santa catalina island
Animal Genetics, 2007Co-Authors: A. B. Vogel, Natalie D Halbert, James N Derr, K. Tenggardjaja, Suzanne Edmands, Dennis HedgecockAbstract:Summary In 1924, 14 American bison (Bison bison) were introduced to Santa Catalina Island, California and sporadically supplemented thereafter with additional animals. To reduce the herd and its impact on native vegetation, over 2000 animals have been exported during the past four decades. Today, the herd is estimated to contain around 250 individuals. Genetic analysis was performed on 98 animals removed from the island in 2004. Forty-four samples (45%) had Domestic Cattle mitochondrial DNA (mtDNA), 12 (12%) had previously reported bison haplotypes and 42 (43%) had a new haplotype differing by one base pair from a previously reported bison haplotype. A complement of five restriction enzymes was found to be useful in identifying bison with Domestic Cattle mtDNA.
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Detection of mitochondrial DNA from Domestic Cattle in bison on
2007Co-Authors: A. B. Vogel, Natalie D Halbert, James N Derr, K. Tenggardjaja, Suzanne Edmands, Dennis HedgecockAbstract:Summary In 1924, 14 American bison (Bison bison) were introduced to Santa Catalina Island,California and sporadically supplemented thereafter with additional animals. To reduce theherd and its impact on native vegetation, over 2000 animals have been exported during thepast four decades. Today, the herd is estimated to contain around 250 individuals. Geneticanalysis was performed on 98 animals removed from the island in 2004. Forty-four samples(45%) had Domestic Cattle mitochondrial DNA (mtDNA), 12 (12%) had previously reportedbison haplotypes and 42 (43%) had a new haplotype differing by one base pair from apreviously reported bison haplotype. A complement of five restriction enzymes was found tobe useful in identifying bison with Domestic Cattle mtDNA.Keywords American bison, Bison, Bovidae, genetics, introgression, mtDNA.The census size of American Bison (Bison bison) droppedfrom millions of individuals in 1800 to
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A Comprehensive Evaluation of Cattle Introgression into US Federal Bison Herds
Journal of Heredity, 2006Co-Authors: Natalie D Halbert, James N DerrAbstract:Geneticintrogression,especiallyfrominterspecieshybridization,isasignificantthreattospeciesconservationworldwide.Inthis study, 11 US federal bison populations were comprehensively examined for evidence of both mitochondrial and nuclear Domestic Cattle (Bos taurus) introgression. Mitochondrial introgression was examined using established polymerase chain reaction methodsandconfirmedthroughanalysisofD-loop sequences.Nuclear introgression wasassessedin14chromosomalregions through examination of microsatellite electromorph and sequence differences between bison and Domestic Cattle. Only one populationwasidentifiedwithDomesticCattlemitochondrialDNAintrogression.Incontrast,evidenceofnuclearintrogression wasfoundin7(63.6%)oftheexaminedpopulations.Historicaccountsofbisontransfersamongpopulationswerecorroborated with evidence of introgressed DNA transmission. While neither nuclear nor mitochondrial Domestic Cattle introgression was detectedinbisonfromGrandTeton NationalPark,Sully’sHillNationalGamePreserve,WindCaveNationalPark,orYellowstone National Park, adequate sample sizes were available only from the last 2 populations to allow for statistical confidence (.90%)innuclearintrogressiondetectionlimits.Theidentificationofgeneticallyuniqueandundisturbedpopulationsiscritical to species conservation efforts, and this study serves as a model for the genetic evaluation of interspecies introgression.
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conservation genomics disequilibrium mapping of Domestic Cattle chromosomal segments in north american bison populations
Molecular Ecology, 2005Co-Authors: Natalie D Halbert, Todd J Ward, Robert D Schnabel, Jeremy F Taylor, James N DerrAbstract:Introgressive hybridization is one of the major threats to species conservation, and is often induced by human influence on the natural habitat of wildlife species. The ability to accurately identify introgression is critical to understanding its importance in evolution and effective conservation management of species. Hybridization between North American bison ( Bison bison ) and Domestic Cattle ( Bos taurus ) as a result of human activities has been recorded for over 100 years, and Domestic Cattle mitochondrial DNA was previously detected in bison populations. In this study, linked microsatellite markers were used to identify Domestic Cattle chromosomal segments in 14 genomic regions from 14 bison populations. Cattle nuclear introgression was identified in five populations, with an average frequency per population ranging from 0.56% to 1.80%. This study represents the first use of linked molecular markers to examine introgression between mammalian species and the first demonstration of Domestic Cattle nuclear introgression in bison. To date, six public bison populations have been identified with no evidence of mitochondrial or nuclear Domestic Cattle introgression, providing information critical to the future management of bison genetic resources. The ability to identify even low levels of introgression resulting from historic hybridization events suggests that the use of linked molecular markers to identify introgression is a significant development in the study of introgressive hybridization across a broad range of taxa.
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validation of 15 microsatellites for parentage testing in north american bison bison bison and Domestic Cattle
Animal Genetics, 2000Co-Authors: Robert D Schnabel, Todd J Ward, James N DerrAbstract:Fifteen bovine microsatellites were evaluated for use in parentage testing in 725 bison from 14 public populations, 178 bison from two private ranches and 107 Domestic Cattle from five different breeds. The number of alleles per locus ranged from five to 16 in bison and from five to 13 in Cattle. On average, expected heterozygosity, polymorphism information content (PIC) and probability of exclusion values were slightly lower in bison than in Cattle. A core set of 12 loci was further refined to produce a set of multiplexed markers suitable for routine parentage testing. Assuming one known parent, the core set of markers provides exclusion probabilities in bison of 0·9955 and in Cattle of 0·9995 averaged across all populations or breeds tested. Tests of Hardy-Weinberg and linkage equilibrium showed only minor deviations. This core set of 12 loci represent a powerful and efficient method for determining parentage in North American bison and Domestic Cattle.
Todd J Ward - One of the best experts on this subject based on the ideXlab platform.
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conservation genomics disequilibrium mapping of Domestic Cattle chromosomal segments in north american bison populations
Molecular Ecology, 2005Co-Authors: Natalie D Halbert, Todd J Ward, Robert D Schnabel, Jeremy F Taylor, James N DerrAbstract:Introgressive hybridization is one of the major threats to species conservation, and is often induced by human influence on the natural habitat of wildlife species. The ability to accurately identify introgression is critical to understanding its importance in evolution and effective conservation management of species. Hybridization between North American bison ( Bison bison ) and Domestic Cattle ( Bos taurus ) as a result of human activities has been recorded for over 100 years, and Domestic Cattle mitochondrial DNA was previously detected in bison populations. In this study, linked microsatellite markers were used to identify Domestic Cattle chromosomal segments in 14 genomic regions from 14 bison populations. Cattle nuclear introgression was identified in five populations, with an average frequency per population ranging from 0.56% to 1.80%. This study represents the first use of linked molecular markers to examine introgression between mammalian species and the first demonstration of Domestic Cattle nuclear introgression in bison. To date, six public bison populations have been identified with no evidence of mitochondrial or nuclear Domestic Cattle introgression, providing information critical to the future management of bison genetic resources. The ability to identify even low levels of introgression resulting from historic hybridization events suggests that the use of linked molecular markers to identify introgression is a significant development in the study of introgressive hybridization across a broad range of taxa.
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validation of 15 microsatellites for parentage testing in north american bison bison bison and Domestic Cattle
Animal Genetics, 2000Co-Authors: Robert D Schnabel, Todd J Ward, James N DerrAbstract:Fifteen bovine microsatellites were evaluated for use in parentage testing in 725 bison from 14 public populations, 178 bison from two private ranches and 107 Domestic Cattle from five different breeds. The number of alleles per locus ranged from five to 16 in bison and from five to 13 in Cattle. On average, expected heterozygosity, polymorphism information content (PIC) and probability of exclusion values were slightly lower in bison than in Cattle. A core set of 12 loci was further refined to produce a set of multiplexed markers suitable for routine parentage testing. Assuming one known parent, the core set of markers provides exclusion probabilities in bison of 0·9955 and in Cattle of 0·9995 averaged across all populations or breeds tested. Tests of Hardy-Weinberg and linkage equilibrium showed only minor deviations. This core set of 12 loci represent a powerful and efficient method for determining parentage in North American bison and Domestic Cattle.
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identification of Domestic Cattle hybrids in wild Cattle and bison species a general approach using mtdna markers and the parametric bootstrap
Animal Conservation, 1999Co-Authors: Todd J Ward, Scott K. Davis, Joseph P Bielawski, J W Templeton, James N DerrAbstract:Many species are currently undergoing reductions in population size due to widespread habitat loss and expanding human activities. Because interspecific hybridization is often a consequence of population decline and fragmentation, identification of individuals or populations with hybrid ancestry is an increasingly important issue in conservation biology. In many wild Cattle and bison species, the problem of natural hybridization has been compounded by indiscriminate crossbreeding with Domestic Cattle for the purpose of improving Domesticated stocks. Therefore, a genetic test using the polymerase chain reaction was developed so that wild Cattle and bison with Domestic Cattle mitochondrial DNA (mtDNA) haplotypes could be rapidly identified. Using this genetic test, Domestic Cattle mtDNA haplotypes were detected in Bos grunniens (yak), Bison bonasus (European bison), and 6 out of the 15 (40%) Bison bison (North American bison) populations tested. In total, 30 out of the 572 (5.2%) North American bison tested, were found to have Domestic Cattle mtDNA. The hybrid origin of these mtDNA haplotypes was verified in a phylogenetic analysis using the parametric bootstrap. These results are discussed in terms of their implications for the conservation status and future management of wild Cattle and bison species.
Takashi Amano - One of the best experts on this subject based on the ideXlab platform.
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polymorphisms in the bovine hemoglobin beta gene provide evidence for gene flow between wild species of bos bibos and Domestic Cattle in southeast asia
Animal Science Journal, 2011Co-Authors: Kazuaki Tanaka, Takashi Amano, Tatsuya Takizawa, Tashi Dorji, Hideyuki Mannen, Yoshizane Maeda, Yoshio Yamamoto, Takao NamikawaAbstract:The electrophoretic variation in bovine hemoglobin-beta (HBB) is one of the most investigated genetic markers. The presence of a unique HBB variant, HBBX, in Southeast Asian Cattle has been reputed as a sign of gene-flow from wild bovine species. In this study, we analyzed the DNA sequences of HBB genes in Domestic and wild bovine species to verify this belief. Isoelectric focusing of HBB chain revealed that the HBBX in Domestic Cattle had dimorphism and was separated into HBBX1 and HBBX2. The HBBX1 had the same DNA sequence of the common HBB variant in gayal (Bos gaurus frontalis), while some of the HBBX2 were identical with that of Cambodian banteng (Bos javanicus birmanicus). As a result, we confirmed that the bovine HBB variants can be a good indicator of introgression between wild and Domestic Cattle. The HBBX1 was always predominant to HBBX2 in the continental populations, suggesting that the gaur had contributed to the gene pool of Domestic Cattle in this region much more than the banteng. On the other hand, the mitochondrial DNA analysis could not detect gene-flow from wild species. Autosomal markers that can trace the phylogeny between alleles are suitable for the assessment of bovine interspecific introgression.
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Polymorphisms in the bovine hemoglobin‐beta gene provide evidence for gene‐flow between wild species of Bos (Bibos) and Domestic Cattle in Southeast Asia
Animal Science Journal, 2010Co-Authors: Kazuaki Tanaka, Takashi Amano, Tatsuya Takizawa, Tashi Dorji, Hideyuki Mannen, Yoshizane Maeda, Yoshio Yamamoto, Takao NamikawaAbstract:The electrophoretic variation in bovine hemoglobin-beta (HBB) is one of the most investigated genetic markers. The presence of a unique HBB variant, HBBX, in Southeast Asian Cattle has been reputed as a sign of gene-flow from wild bovine species. In this study, we analyzed the DNA sequences of HBB genes in Domestic and wild bovine species to verify this belief. Isoelectric focusing of HBB chain revealed that the HBBX in Domestic Cattle had dimorphism and was separated into HBBX1 and HBBX2. The HBBX1 had the same DNA sequence of the common HBB variant in gayal (Bos gaurus frontalis), while some of the HBBX2 were identical with that of Cambodian banteng (Bos javanicus birmanicus). As a result, we confirmed that the bovine HBB variants can be a good indicator of introgression between wild and Domestic Cattle. The HBBX1 was always predominant to HBBX2 in the continental populations, suggesting that the gaur had contributed to the gene pool of Domestic Cattle in this region much more than the banteng. On the other hand, the mitochondrial DNA analysis could not detect gene-flow from wild species. Autosomal markers that can trace the phylogeny between alleles are suitable for the assessment of bovine interspecific introgression.
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phylogenies using mtdna and sry provide evidence for male mediated introgression in asian Domestic Cattle
Animal Genetics, 2003Co-Authors: Yoshiaki Kikkawa, Toyoyuki Takada, Koh Nomura, Takao Namikawa, Hiromichi Yonekawa, Takashi AmanoAbstract:Summary Using nucleotide sequences of the mitochondrial DNA (mtDNA) cytochrome b and SRY genes, we examined the genetic status of two major groups of Domestic Cattle, the humpless taurine (Bos taurus) and humped zebu (B. indicus), using 10 Cattle populations in Asia. Several sequence polymorphisms specific for each major group were found, although the frequency of these polymorphisms varied in each population. Six major mtDNA-SRY composite types were observed. The Mishima, Mongolian, Korean, Chinese Yellow and Sri Lanka Cattle populations had a full match between the mtDNA and SRY sequences, specifically the taurine/taurine type or zebu/zebu type. A non-match type (zebu/taurine type) was found at a high frequency in the Bangladesh (83.4%) and Nepal populations (83.3%). Our results suggest that these non-match type populations developed from genetic hybridization of different strains. Also, the Domestication history of modern Asian Domestic Cattle could be explained by male-mediated introgression. Additionally, our results suggest the occurrence of introgression of mtDNA from other Bibos or Poephagus species into native Cattle populations. The existence of other mtDNA-SRY composite types, such as the Bali-zebu and yak-zebu types in Indonesia (85.7%) and Nepal (16.7%), respectively, suggests that genetic introgression also occurred from other genera into Domestic Cattle during the process of Domestication.
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Phylogenies using mtDNA and SRY provide evidence for male‐mediated introgression in Asian Domestic Cattle
Animal Genetics, 2003Co-Authors: Yoshiaki Kikkawa, Toyoyuki Takada, Koh Nomura, Takao Namikawa, Hiromichi Yonekawa, Sutopo, Takashi AmanoAbstract:Summary Using nucleotide sequences of the mitochondrial DNA (mtDNA) cytochrome b and SRY genes, we examined the genetic status of two major groups of Domestic Cattle, the humpless taurine (Bos taurus) and humped zebu (B. indicus), using 10 Cattle populations in Asia. Several sequence polymorphisms specific for each major group were found, although the frequency of these polymorphisms varied in each population. Six major mtDNA-SRY composite types were observed. The Mishima, Mongolian, Korean, Chinese Yellow and Sri Lanka Cattle populations had a full match between the mtDNA and SRY sequences, specifically the taurine/taurine type or zebu/zebu type. A non-match type (zebu/taurine type) was found at a high frequency in the Bangladesh (83.4%) and Nepal populations (83.3%). Our results suggest that these non-match type populations developed from genetic hybridization of different strains. Also, the Domestication history of modern Asian Domestic Cattle could be explained by male-mediated introgression. Additionally, our results suggest the occurrence of introgression of mtDNA from other Bibos or Poephagus species into native Cattle populations. The existence of other mtDNA-SRY composite types, such as the Bali-zebu and yak-zebu types in Indonesia (85.7%) and Nepal (16.7%), respectively, suggests that genetic introgression also occurred from other genera into Domestic Cattle during the process of Domestication.
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analysis of genetic diversity of Domestic Cattle in east and southeast asia in terms of variations in restriction sites and sequences of mitochondrial dna
Biochemical Genetics, 1995Co-Authors: Yoshiaki Kikkawa, Takashi Amano, Hitoshi SuzukiAbstract:There are three major groups of Domestic Cattle in East and Southeast Asia: European Cattle, Zebu Cattle, and Bali Cattle. Ten restriction enzymes were used to analyze restriction site variants in the mitochondrial DNA (mtDNA) in 178 individuals belonging to these three groups of Cattle. The results indicate that each of the three groups has mtDNA with a specific haplotype. The sequence of the mitochondrial gene for cytochrome b in representative haplotypes of Zebu and Bali Cattle was determined and was compared with that of European Cattle in the literature. We calculated 51 pairwise nucleotide sequence differences between European and Zebu Cattle and 91 between European and Bali Cattle. Our results suggest that ancestral populations of Asiatic Domestic Cattle may have diverged into two lineages—Bali and European plus Zebu—more than 3 million years ago, and then the European and Zebu groups diverged more than 1 million years or so before Domestication occurred.
Robert D Schnabel - One of the best experts on this subject based on the ideXlab platform.
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conservation genomics disequilibrium mapping of Domestic Cattle chromosomal segments in north american bison populations
Molecular Ecology, 2005Co-Authors: Natalie D Halbert, Todd J Ward, Robert D Schnabel, Jeremy F Taylor, James N DerrAbstract:Introgressive hybridization is one of the major threats to species conservation, and is often induced by human influence on the natural habitat of wildlife species. The ability to accurately identify introgression is critical to understanding its importance in evolution and effective conservation management of species. Hybridization between North American bison ( Bison bison ) and Domestic Cattle ( Bos taurus ) as a result of human activities has been recorded for over 100 years, and Domestic Cattle mitochondrial DNA was previously detected in bison populations. In this study, linked microsatellite markers were used to identify Domestic Cattle chromosomal segments in 14 genomic regions from 14 bison populations. Cattle nuclear introgression was identified in five populations, with an average frequency per population ranging from 0.56% to 1.80%. This study represents the first use of linked molecular markers to examine introgression between mammalian species and the first demonstration of Domestic Cattle nuclear introgression in bison. To date, six public bison populations have been identified with no evidence of mitochondrial or nuclear Domestic Cattle introgression, providing information critical to the future management of bison genetic resources. The ability to identify even low levels of introgression resulting from historic hybridization events suggests that the use of linked molecular markers to identify introgression is a significant development in the study of introgressive hybridization across a broad range of taxa.
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validation of 15 microsatellites for parentage testing in north american bison bison bison and Domestic Cattle
Animal Genetics, 2000Co-Authors: Robert D Schnabel, Todd J Ward, James N DerrAbstract:Fifteen bovine microsatellites were evaluated for use in parentage testing in 725 bison from 14 public populations, 178 bison from two private ranches and 107 Domestic Cattle from five different breeds. The number of alleles per locus ranged from five to 16 in bison and from five to 13 in Cattle. On average, expected heterozygosity, polymorphism information content (PIC) and probability of exclusion values were slightly lower in bison than in Cattle. A core set of 12 loci was further refined to produce a set of multiplexed markers suitable for routine parentage testing. Assuming one known parent, the core set of markers provides exclusion probabilities in bison of 0·9955 and in Cattle of 0·9995 averaged across all populations or breeds tested. Tests of Hardy-Weinberg and linkage equilibrium showed only minor deviations. This core set of 12 loci represent a powerful and efficient method for determining parentage in North American bison and Domestic Cattle.
Takao Namikawa - One of the best experts on this subject based on the ideXlab platform.
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polymorphisms in the bovine hemoglobin beta gene provide evidence for gene flow between wild species of bos bibos and Domestic Cattle in southeast asia
Animal Science Journal, 2011Co-Authors: Kazuaki Tanaka, Takashi Amano, Tatsuya Takizawa, Tashi Dorji, Hideyuki Mannen, Yoshizane Maeda, Yoshio Yamamoto, Takao NamikawaAbstract:The electrophoretic variation in bovine hemoglobin-beta (HBB) is one of the most investigated genetic markers. The presence of a unique HBB variant, HBBX, in Southeast Asian Cattle has been reputed as a sign of gene-flow from wild bovine species. In this study, we analyzed the DNA sequences of HBB genes in Domestic and wild bovine species to verify this belief. Isoelectric focusing of HBB chain revealed that the HBBX in Domestic Cattle had dimorphism and was separated into HBBX1 and HBBX2. The HBBX1 had the same DNA sequence of the common HBB variant in gayal (Bos gaurus frontalis), while some of the HBBX2 were identical with that of Cambodian banteng (Bos javanicus birmanicus). As a result, we confirmed that the bovine HBB variants can be a good indicator of introgression between wild and Domestic Cattle. The HBBX1 was always predominant to HBBX2 in the continental populations, suggesting that the gaur had contributed to the gene pool of Domestic Cattle in this region much more than the banteng. On the other hand, the mitochondrial DNA analysis could not detect gene-flow from wild species. Autosomal markers that can trace the phylogeny between alleles are suitable for the assessment of bovine interspecific introgression.
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Polymorphisms in the bovine hemoglobin‐beta gene provide evidence for gene‐flow between wild species of Bos (Bibos) and Domestic Cattle in Southeast Asia
Animal Science Journal, 2010Co-Authors: Kazuaki Tanaka, Takashi Amano, Tatsuya Takizawa, Tashi Dorji, Hideyuki Mannen, Yoshizane Maeda, Yoshio Yamamoto, Takao NamikawaAbstract:The electrophoretic variation in bovine hemoglobin-beta (HBB) is one of the most investigated genetic markers. The presence of a unique HBB variant, HBBX, in Southeast Asian Cattle has been reputed as a sign of gene-flow from wild bovine species. In this study, we analyzed the DNA sequences of HBB genes in Domestic and wild bovine species to verify this belief. Isoelectric focusing of HBB chain revealed that the HBBX in Domestic Cattle had dimorphism and was separated into HBBX1 and HBBX2. The HBBX1 had the same DNA sequence of the common HBB variant in gayal (Bos gaurus frontalis), while some of the HBBX2 were identical with that of Cambodian banteng (Bos javanicus birmanicus). As a result, we confirmed that the bovine HBB variants can be a good indicator of introgression between wild and Domestic Cattle. The HBBX1 was always predominant to HBBX2 in the continental populations, suggesting that the gaur had contributed to the gene pool of Domestic Cattle in this region much more than the banteng. On the other hand, the mitochondrial DNA analysis could not detect gene-flow from wild species. Autosomal markers that can trace the phylogeny between alleles are suitable for the assessment of bovine interspecific introgression.
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phylogenies using mtdna and sry provide evidence for male mediated introgression in asian Domestic Cattle
Animal Genetics, 2003Co-Authors: Yoshiaki Kikkawa, Toyoyuki Takada, Koh Nomura, Takao Namikawa, Hiromichi Yonekawa, Takashi AmanoAbstract:Summary Using nucleotide sequences of the mitochondrial DNA (mtDNA) cytochrome b and SRY genes, we examined the genetic status of two major groups of Domestic Cattle, the humpless taurine (Bos taurus) and humped zebu (B. indicus), using 10 Cattle populations in Asia. Several sequence polymorphisms specific for each major group were found, although the frequency of these polymorphisms varied in each population. Six major mtDNA-SRY composite types were observed. The Mishima, Mongolian, Korean, Chinese Yellow and Sri Lanka Cattle populations had a full match between the mtDNA and SRY sequences, specifically the taurine/taurine type or zebu/zebu type. A non-match type (zebu/taurine type) was found at a high frequency in the Bangladesh (83.4%) and Nepal populations (83.3%). Our results suggest that these non-match type populations developed from genetic hybridization of different strains. Also, the Domestication history of modern Asian Domestic Cattle could be explained by male-mediated introgression. Additionally, our results suggest the occurrence of introgression of mtDNA from other Bibos or Poephagus species into native Cattle populations. The existence of other mtDNA-SRY composite types, such as the Bali-zebu and yak-zebu types in Indonesia (85.7%) and Nepal (16.7%), respectively, suggests that genetic introgression also occurred from other genera into Domestic Cattle during the process of Domestication.
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Phylogenies using mtDNA and SRY provide evidence for male‐mediated introgression in Asian Domestic Cattle
Animal Genetics, 2003Co-Authors: Yoshiaki Kikkawa, Toyoyuki Takada, Koh Nomura, Takao Namikawa, Hiromichi Yonekawa, Sutopo, Takashi AmanoAbstract:Summary Using nucleotide sequences of the mitochondrial DNA (mtDNA) cytochrome b and SRY genes, we examined the genetic status of two major groups of Domestic Cattle, the humpless taurine (Bos taurus) and humped zebu (B. indicus), using 10 Cattle populations in Asia. Several sequence polymorphisms specific for each major group were found, although the frequency of these polymorphisms varied in each population. Six major mtDNA-SRY composite types were observed. The Mishima, Mongolian, Korean, Chinese Yellow and Sri Lanka Cattle populations had a full match between the mtDNA and SRY sequences, specifically the taurine/taurine type or zebu/zebu type. A non-match type (zebu/taurine type) was found at a high frequency in the Bangladesh (83.4%) and Nepal populations (83.3%). Our results suggest that these non-match type populations developed from genetic hybridization of different strains. Also, the Domestication history of modern Asian Domestic Cattle could be explained by male-mediated introgression. Additionally, our results suggest the occurrence of introgression of mtDNA from other Bibos or Poephagus species into native Cattle populations. The existence of other mtDNA-SRY composite types, such as the Bali-zebu and yak-zebu types in Indonesia (85.7%) and Nepal (16.7%), respectively, suggests that genetic introgression also occurred from other genera into Domestic Cattle during the process of Domestication.