[Objective] The sequences of mitochondrial DNA D-loop region of Xinjiang Goose with three different colors of plumage were analyzed in order to study the genetic diversity of Xinjiang Goose, as well as the phylogeny a...[Objective] The sequences of mitochondrial DNA D-loop region of Xinjiang Goose with three different colors of plumage were analyzed in order to study the genetic diversity of Xinjiang Goose, as well as the phylogeny and evolution. [Method] Ten geese were selected randomly from the core populations of grey-, mosaic- and white-plumaged Xinjiang Goose respectively with a total number of thirty as experi- mental materials, of which the blood samples were collected from the largest vein under the wing (brachial vein) for DNA extraction. Sequences of mitochondrial DNA D-loop regions were determined using DNA sequencing technology to analyze the polymorphism. In addition, the genetic distances among different populations were estimated through the comparison with the reference sequences. [Resull] The con- tents of A, G, C and T nucleotides in the D-loop region of Xinjiang Goose were 28.85%, 17.05%, 25.38% and 28.72%, respectively. The average haplotype diversity and nucleotide diversity of Xinjiang Goose were 0.583 and 0.056. Xinjiang Goose and Greylag Goose were clustered into the same group. [Conclusion] The results showed that Xinjiang Geese with three different colors of plumage all descend from Greylag Goose (Anser anser).展开更多
Conogethes punctiferalis(Guenée)(Lepidoptera: Crambidae) was originally considered as one species with fruit-feeding type(FFT) and pinaceae-feeding type(PFT), but it has subsequently been divided into tw...Conogethes punctiferalis(Guenée)(Lepidoptera: Crambidae) was originally considered as one species with fruit-feeding type(FFT) and pinaceae-feeding type(PFT), but it has subsequently been divided into two different species of Conogethes punctiferalis and Conogethes pinicolalis. The relationship between the two species was investigated by phylogenetic reconstruction using maximum-likelihood(ML) parameter estimations. The phylogenetic tree and network were constructed based upon sequence data from concatenation of three genes of mitochondrial cytochrome c oxidase subunits I, II and cytochrome b which were derived from 118 samples of C. punctiferalis and 24 samples of C. pinicolalis. The phylogenetic tree and network showed that conspecific sequences were clustering together despite intraspecific variability. Here we report the results of a combined analysis of mitochondrial DNA sequences from three genes and morphological data representing powerful evidence that C. pinicolalisand C. punctiferalis are significantly different.展开更多
Present study describes the results of an efficient protocol for the isolation of good quality DNA from human saliva. The protocol includes collection of saliva in sterile specimen tubes, followed by the cell lysis. A...Present study describes the results of an efficient protocol for the isolation of good quality DNA from human saliva. The protocol includes collection of saliva in sterile specimen tubes, followed by the cell lysis. After formation of cell lysate, proteins wereextracted by phenol chloroform treatment for purification of DNA. The purified DNA was precipitated by adding equal volume of isopropanol to the treated supernatant. After isolation DNA pellet was washed with 70% ethanol, air-dried and was suspended in 30 pL of double distilled water. Best quality of DNA was extracted from the saliva samples and the PCR product was amplified for hyper-variable regions (HVI& HV2) of the mitochondrial DNA. The genes were cleaned with GeneAll gel elution kit (Gel SV) (Cat. No. 102-10) and sequenced accordingly. The DNA isolation protocol presented here is recommended for the isolation, best quality and yield of DNA from the human saliva.展开更多
The brown marmorated stink bug, <i><span style="font-family:Verdana;">Halyomorpha halys</span></i><span style="font-family:Verdana;"> (Stal) (Hemiptera: Pentatomidae) ...The brown marmorated stink bug, <i><span style="font-family:Verdana;">Halyomorpha halys</span></i><span style="font-family:Verdana;"> (Stal) (Hemiptera: Pentatomidae) is an invasive species native to East Asia that has spread across Asia, Europe</span><span style="font-family:Verdana;">,</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> and North America. </span><i><span style="font-family:Verdana;">H. halys </span></i><span style="font-family:Verdana;">causes damages to various grains, fruits, and vegetables, which is exemplified by the significant damage to the hazelnut harvest in Georgia (during 2016). This report describes the first attempted genetic study of the spread of </span><i><span style="font-family:Verdana;">H. halys</span></i><span style="font-family:Verdana;"> in Georgia. The first main goal of this research was to identify the haplotype of an invasive population in Georgia. For this purpose, the mitochondrial cytochrome c oxidase I subunit (</span><i><span style="font-family:Verdana;">COI</span></i><span style="font-family:Verdana;">) gene fragment from 65 samples</span><i><span style="font-family:Verdana;"> of H. halys</span></i><span style="font-family:Verdana;"> collected from different regions across Georgia was sequenced on an Applied Biosystems 3100 or 3700 genetic analyzer. In all cases, only the H1 haplotype, which is native to China, was identified. The second goal of this research was to determine the complete mitochondrial DNA sequence of </span><i><span style="font-family:Verdana;">H. halys</span></i><span style="font-family:Verdana;"> (Stal) specimens collected </span><span style="font-family:Verdana;">across Georgia. The complete mitochondrial DNA of H1 haplotype s</span><span style="font-family:Verdana;">equenced on an Illumina MiSeq platform. The mitochondrial DNA of the Georgian H1 haplotype has a length of 15</span></span><span style="font-family:Verdana;">,</span><span style="font-family:;" "=""><span style="font-family:Verdana;">478 base pairs. Using the sequence of the H22 haplotype of </span><i><span style="font-family:Verdana;">H. halys </span></i><span style="font-family:Verdana;">(native to Korea) as a reference, 62 single nucleotide polymorphisms (SNPs), three inversions</span></span><span style="font-family:Verdana;">,</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> and four single T insertions were identified. Furthermore, 60 SNPs and four insertions in two tRNA and one rRNA genes were identified among 18 mitochondrial genes from the Georgian H1 haplotype. Nine of these SNPs resulted in amino acid substitutions. Furthermore, the detection of SNPs revealed many other polymorphic sites beyond the </span><i><span style="font-family:Verdana;">COI</span></i><span style="font-family:Verdana;"> gene, which can be used to detect new haplotypes.</span></span>展开更多
基金Supported by the Fond for Open Projects of Xinjiang Key Laboratory of Herbivore Nutrition for Meat&Milk Production~~
文摘[Objective] The sequences of mitochondrial DNA D-loop region of Xinjiang Goose with three different colors of plumage were analyzed in order to study the genetic diversity of Xinjiang Goose, as well as the phylogeny and evolution. [Method] Ten geese were selected randomly from the core populations of grey-, mosaic- and white-plumaged Xinjiang Goose respectively with a total number of thirty as experi- mental materials, of which the blood samples were collected from the largest vein under the wing (brachial vein) for DNA extraction. Sequences of mitochondrial DNA D-loop regions were determined using DNA sequencing technology to analyze the polymorphism. In addition, the genetic distances among different populations were estimated through the comparison with the reference sequences. [Resull] The con- tents of A, G, C and T nucleotides in the D-loop region of Xinjiang Goose were 28.85%, 17.05%, 25.38% and 28.72%, respectively. The average haplotype diversity and nucleotide diversity of Xinjiang Goose were 0.583 and 0.056. Xinjiang Goose and Greylag Goose were clustered into the same group. [Conclusion] The results showed that Xinjiang Geese with three different colors of plumage all descend from Greylag Goose (Anser anser).
基金supported by China Agriculture Research System(CARS-02)Beijing Municipal Sci-Tech Program(Z111100056811009)
文摘Conogethes punctiferalis(Guenée)(Lepidoptera: Crambidae) was originally considered as one species with fruit-feeding type(FFT) and pinaceae-feeding type(PFT), but it has subsequently been divided into two different species of Conogethes punctiferalis and Conogethes pinicolalis. The relationship between the two species was investigated by phylogenetic reconstruction using maximum-likelihood(ML) parameter estimations. The phylogenetic tree and network were constructed based upon sequence data from concatenation of three genes of mitochondrial cytochrome c oxidase subunits I, II and cytochrome b which were derived from 118 samples of C. punctiferalis and 24 samples of C. pinicolalis. The phylogenetic tree and network showed that conspecific sequences were clustering together despite intraspecific variability. Here we report the results of a combined analysis of mitochondrial DNA sequences from three genes and morphological data representing powerful evidence that C. pinicolalisand C. punctiferalis are significantly different.
文摘Present study describes the results of an efficient protocol for the isolation of good quality DNA from human saliva. The protocol includes collection of saliva in sterile specimen tubes, followed by the cell lysis. After formation of cell lysate, proteins wereextracted by phenol chloroform treatment for purification of DNA. The purified DNA was precipitated by adding equal volume of isopropanol to the treated supernatant. After isolation DNA pellet was washed with 70% ethanol, air-dried and was suspended in 30 pL of double distilled water. Best quality of DNA was extracted from the saliva samples and the PCR product was amplified for hyper-variable regions (HVI& HV2) of the mitochondrial DNA. The genes were cleaned with GeneAll gel elution kit (Gel SV) (Cat. No. 102-10) and sequenced accordingly. The DNA isolation protocol presented here is recommended for the isolation, best quality and yield of DNA from the human saliva.
文摘The brown marmorated stink bug, <i><span style="font-family:Verdana;">Halyomorpha halys</span></i><span style="font-family:Verdana;"> (Stal) (Hemiptera: Pentatomidae) is an invasive species native to East Asia that has spread across Asia, Europe</span><span style="font-family:Verdana;">,</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> and North America. </span><i><span style="font-family:Verdana;">H. halys </span></i><span style="font-family:Verdana;">causes damages to various grains, fruits, and vegetables, which is exemplified by the significant damage to the hazelnut harvest in Georgia (during 2016). This report describes the first attempted genetic study of the spread of </span><i><span style="font-family:Verdana;">H. halys</span></i><span style="font-family:Verdana;"> in Georgia. The first main goal of this research was to identify the haplotype of an invasive population in Georgia. For this purpose, the mitochondrial cytochrome c oxidase I subunit (</span><i><span style="font-family:Verdana;">COI</span></i><span style="font-family:Verdana;">) gene fragment from 65 samples</span><i><span style="font-family:Verdana;"> of H. halys</span></i><span style="font-family:Verdana;"> collected from different regions across Georgia was sequenced on an Applied Biosystems 3100 or 3700 genetic analyzer. In all cases, only the H1 haplotype, which is native to China, was identified. The second goal of this research was to determine the complete mitochondrial DNA sequence of </span><i><span style="font-family:Verdana;">H. halys</span></i><span style="font-family:Verdana;"> (Stal) specimens collected </span><span style="font-family:Verdana;">across Georgia. The complete mitochondrial DNA of H1 haplotype s</span><span style="font-family:Verdana;">equenced on an Illumina MiSeq platform. The mitochondrial DNA of the Georgian H1 haplotype has a length of 15</span></span><span style="font-family:Verdana;">,</span><span style="font-family:;" "=""><span style="font-family:Verdana;">478 base pairs. Using the sequence of the H22 haplotype of </span><i><span style="font-family:Verdana;">H. halys </span></i><span style="font-family:Verdana;">(native to Korea) as a reference, 62 single nucleotide polymorphisms (SNPs), three inversions</span></span><span style="font-family:Verdana;">,</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> and four single T insertions were identified. Furthermore, 60 SNPs and four insertions in two tRNA and one rRNA genes were identified among 18 mitochondrial genes from the Georgian H1 haplotype. Nine of these SNPs resulted in amino acid substitutions. Furthermore, the detection of SNPs revealed many other polymorphic sites beyond the </span><i><span style="font-family:Verdana;">COI</span></i><span style="font-family:Verdana;"> gene, which can be used to detect new haplotypes.</span></span>