Pigmentation plays important adaptation and physiological efficiency roles in animals. In the sequence of a 648 bp fragment representing intron 1, exon 2, and part of intron 2 of the MLPH mammalian pigmentation gene, ...Pigmentation plays important adaptation and physiological efficiency roles in animals. In the sequence of a 648 bp fragment representing intron 1, exon 2, and part of intron 2 of the MLPH mammalian pigmentation gene, we identified a novel g.469C> G mutation in intron 2, and genotyped it in 266 Nigerian goats using PCR-RFLP analysis. The C allele had frequencies of 0.9625, 0.9804 and 0.97405 in West African Dwarf (WAD),Sahel(SH) and Red Sokoto (RS) breeds, respectively. The G allele was the highest in WAD (0.0375), followed by RS (0.02595), and then SH (0.0196). Overall low FIS and FST and high Nm values demonstrate little differentiation within and among the goat breeds at this intronic locus. This g.469C> G polymorphism in MLPH gene is the first in any goat breed and also first in Nigerian goats. Our results suggest that this intronic SNP locus is maintained at Hardy-Weinberg equilibrium (P < 0.05) and the lack of association of this SNP with coat color may indicate its neutrality in goats.展开更多
目的在兰科石斛属药用植物鉴定中应用新的分子标记。方法扩增并测定9种石斛属植物线粒体中NADH脱氢酶亚基1编码基因(nad 1)内含子2(in tron 2)的全长序列。结果比对后的nad 1 in tron 2序列长872bp,其中有17个变异位点,可以鉴别除粉花石...目的在兰科石斛属药用植物鉴定中应用新的分子标记。方法扩增并测定9种石斛属植物线粒体中NADH脱氢酶亚基1编码基因(nad 1)内含子2(in tron 2)的全长序列。结果比对后的nad 1 in tron 2序列长872bp,其中有17个变异位点,可以鉴别除粉花石斛D end robium lodd ig esii以外的8种植物。结论线粒体nad 1 in tron2序列可以作为一种新的分子标记用于石斛属植物的鉴定。展开更多
The taxonomic status of the Sulawesi endemic Geomalia heinrichi has long been debated, and it has variously been treated as a babbler (Timaliidae) or a turdid (Turdidae). We estimated the phylogeny of 43 taxa in the f...The taxonomic status of the Sulawesi endemic Geomalia heinrichi has long been debated, and it has variously been treated as a babbler (Timaliidae) or a turdid (Turdidae). We estimated the phylogeny of 43 taxa in the family Turdidae based on the mitochondrial cytochrome b gene and the nuclear myoglobin intron 2 and ornithine decarboxylase introns 6–7. Geomalia heinrichi was shown to be part of the Zoothera clade with high support. We propose that Geomalia is transferred to Zoothera under the name Zoothera heinrichi.展开更多
Serotonin （5-hydroxytryptamine, 5-HT） influences the cortical and subcortical excitatory/inhibitory balance and participates in the pathophysiological processes of epilepsy. The serotonin transporter （5-HTT） is th...Serotonin （5-hydroxytryptamine, 5-HT） influences the cortical and subcortical excitatory/inhibitory balance and participates in the pathophysiological processes of epilepsy. The serotonin transporter （5-HTT） is the most important factor in serotonin inactivation. We tested whether 5-HTT polymorphisms are involved in the pathogenesis of epilepsy in Chinese Han population. We did not find a significant difference in the frequencies of genotypes and alleles in the 5-HTT gene-linked poLymorphic region （5-H-I-FLPR） in patients with non-lesional temporal lobe epilepsy and normal controls （P〉 0.05）. Frequencies of the 5-H1-1- intron 2 variable number tandem repeat （5-HTTVNTR） 12/12 genotype and allele 12 were higher in the patients with non-lesional temporal lobe epilepsy than normal controls （P 〈 0.01）. The odds ratio of affecting non-lesional temporal lobe epilepsy was 1.435 （95% Cl, 1.096 1.880） in patients carrying allele 12 （P 〈 0.05）. Although the 5-HTTLPR may not be a genetic locus of non-lesional temporal lobe epilepsy in Chinese Hart population, allele 12 in the 5-HTTVNTR may correlate with non-lesional temporal lobe epilepsy. The Stin2.12 allele and 12/12 genotype could be predisposing to non-lesional temporal lobe epilepsy.展开更多
龙胆科龙胆属Gentiana秦艽组Sect.Cruciata多种植物作为中药秦艽及藏药解吉(■)的基原,具有重要的药用价值。在课题组前期品种整理及遗传背景分析基础上,本文分别测定秦艽组10种23个居群69份样品以及外类群椭圆叶花锚Halenia elliptica ...龙胆科龙胆属Gentiana秦艽组Sect.Cruciata多种植物作为中药秦艽及藏药解吉(■)的基原,具有重要的药用价值。在课题组前期品种整理及遗传背景分析基础上,本文分别测定秦艽组10种23个居群69份样品以及外类群椭圆叶花锚Halenia elliptica 3份样品的线粒体nad1基因第2内含子区(nad 1/b-c)以及nad5基因第4内含子区(nad5/d-e)部分序列,对其在秦艽组植物的分子系统发育分析及物种鉴定中的意义进行评价。结果显示:nad1/b-c具一粗壮秦艽G.robusta King ex Hook.f.稳定变异位点;同时,对粗茎秦艽G.crassicaulis Duthie ex Burk.及西藏秦艽G.tibetica King ex Hook.f.有一定物种分辨率;nad5/d-e序列相似度高,仅大叶秦艽G.macrophylla Pall.、黄管秦艽G.officinalis H.Smith及管花秦艽G.siphonantha Maxim.ex Kusnez.存在种内不同基因型。进而基于粗壮秦艽G.robusta King ex Hook.f.nad 1/b-c物种分子标记,设计一特异鉴定引物,建立粗壮秦艽特异性引物-PCR鉴定方法。本工作可为协同进化不完全、遗传背景复杂多样的中藏药高山基原植物DNA条形码的构建提供新思路。展开更多
文摘Pigmentation plays important adaptation and physiological efficiency roles in animals. In the sequence of a 648 bp fragment representing intron 1, exon 2, and part of intron 2 of the MLPH mammalian pigmentation gene, we identified a novel g.469C> G mutation in intron 2, and genotyped it in 266 Nigerian goats using PCR-RFLP analysis. The C allele had frequencies of 0.9625, 0.9804 and 0.97405 in West African Dwarf (WAD),Sahel(SH) and Red Sokoto (RS) breeds, respectively. The G allele was the highest in WAD (0.0375), followed by RS (0.02595), and then SH (0.0196). Overall low FIS and FST and high Nm values demonstrate little differentiation within and among the goat breeds at this intronic locus. This g.469C> G polymorphism in MLPH gene is the first in any goat breed and also first in Nigerian goats. Our results suggest that this intronic SNP locus is maintained at Hardy-Weinberg equilibrium (P < 0.05) and the lack of association of this SNP with coat color may indicate its neutrality in goats.
文摘目的在兰科石斛属药用植物鉴定中应用新的分子标记。方法扩增并测定9种石斛属植物线粒体中NADH脱氢酶亚基1编码基因(nad 1)内含子2(in tron 2)的全长序列。结果比对后的nad 1 in tron 2序列长872bp,其中有17个变异位点,可以鉴别除粉花石斛D end robium lodd ig esii以外的8种植物。结论线粒体nad 1 in tron2序列可以作为一种新的分子标记用于石斛属植物的鉴定。
基金the Chinese Academy of Sciences Visiting Professorship for Senior International Scientists (No. 2011T2S04)
文摘The taxonomic status of the Sulawesi endemic Geomalia heinrichi has long been debated, and it has variously been treated as a babbler (Timaliidae) or a turdid (Turdidae). We estimated the phylogeny of 43 taxa in the family Turdidae based on the mitochondrial cytochrome b gene and the nuclear myoglobin intron 2 and ornithine decarboxylase introns 6–7. Geomalia heinrichi was shown to be part of the Zoothera clade with high support. We propose that Geomalia is transferred to Zoothera under the name Zoothera heinrichi.
文摘Serotonin （5-hydroxytryptamine, 5-HT） influences the cortical and subcortical excitatory/inhibitory balance and participates in the pathophysiological processes of epilepsy. The serotonin transporter （5-HTT） is the most important factor in serotonin inactivation. We tested whether 5-HTT polymorphisms are involved in the pathogenesis of epilepsy in Chinese Han population. We did not find a significant difference in the frequencies of genotypes and alleles in the 5-HTT gene-linked poLymorphic region （5-H-I-FLPR） in patients with non-lesional temporal lobe epilepsy and normal controls （P〉 0.05）. Frequencies of the 5-H1-1- intron 2 variable number tandem repeat （5-HTTVNTR） 12/12 genotype and allele 12 were higher in the patients with non-lesional temporal lobe epilepsy than normal controls （P 〈 0.01）. The odds ratio of affecting non-lesional temporal lobe epilepsy was 1.435 （95% Cl, 1.096 1.880） in patients carrying allele 12 （P 〈 0.05）. Although the 5-HTTLPR may not be a genetic locus of non-lesional temporal lobe epilepsy in Chinese Hart population, allele 12 in the 5-HTTVNTR may correlate with non-lesional temporal lobe epilepsy. The Stin2.12 allele and 12/12 genotype could be predisposing to non-lesional temporal lobe epilepsy.
文摘龙胆科龙胆属Gentiana秦艽组Sect.Cruciata多种植物作为中药秦艽及藏药解吉(■)的基原,具有重要的药用价值。在课题组前期品种整理及遗传背景分析基础上,本文分别测定秦艽组10种23个居群69份样品以及外类群椭圆叶花锚Halenia elliptica 3份样品的线粒体nad1基因第2内含子区(nad 1/b-c)以及nad5基因第4内含子区(nad5/d-e)部分序列,对其在秦艽组植物的分子系统发育分析及物种鉴定中的意义进行评价。结果显示:nad1/b-c具一粗壮秦艽G.robusta King ex Hook.f.稳定变异位点;同时,对粗茎秦艽G.crassicaulis Duthie ex Burk.及西藏秦艽G.tibetica King ex Hook.f.有一定物种分辨率;nad5/d-e序列相似度高,仅大叶秦艽G.macrophylla Pall.、黄管秦艽G.officinalis H.Smith及管花秦艽G.siphonantha Maxim.ex Kusnez.存在种内不同基因型。进而基于粗壮秦艽G.robusta King ex Hook.f.nad 1/b-c物种分子标记,设计一特异鉴定引物,建立粗壮秦艽特异性引物-PCR鉴定方法。本工作可为协同进化不完全、遗传背景复杂多样的中藏药高山基原植物DNA条形码的构建提供新思路。
