新疆吐鲁番发现快步麻蜥指名亚种

快步麻蜥复合体（Eremias velox complex）分布于亚洲中部干旱区,不同地理居群形态和遗传变异较大。学界长期认为,快步麻蜥在我国有两个亚种：指名亚种（E.veloxvelox）和E.v.roborowskii亚种。前者分布于新疆准噶尔盆地和伊犁河谷;后者分布于新疆吐鲁番盆地,近年分类地位由亚种提升为种——吐鲁番麻蜥（E. roborowskii）。我们在吐鲁番市高昌区一万泉附近捕获到3只麻蜥,经过COI基因序列比对和系统发育关系重建以及外部形态比较,鉴定为快步麻蜥指名亚种。这是首次发现新疆天山以南存在快步麻蜥指名亚种分布,同时也确定为吐鲁番盆地的蜥蜴类分布新记录种,此发现可为研究快步麻蜥的谱系地理格局和演化历史提供基础资料。     

黄眉姬鹟琉球亚种在中国大陆的新纪录(雀形目,鹟科)

2005年4月7日在广州中山大学康乐园校区竹园内观测到一只黄眉姬鹟琉球亚种Ficedula narcissina owstoni的first-spring雄性个体,并以照片记录了该种,是中国大陆的鸟类亚种新纪录.本文对比了该亚种与指名亚种first-spring雄鸟的外形特征,并对该亚种的分布进行了简要讨论.     

几种鼢鼠染色体组型和血清LDH同工酶电泳的比较研究

本文报道了中华鼢鼠指名亚种、甘肃亚种、四川亚种、罗氏鼢鼠的染色体组型和LDH同工酶电泳。发现中华鼢鼠3个亚种染色体数2n=60,罗氏鼢鼠2n=58;中华鼢鼠指名亚种和甘肃亚种LDH同工酶酶谱带数为3条,而中华鼢鼠四川亚种和罗氏鼢鼠为2条。同时,对分类学上争论的问题进行了讨论。     

小熊猫种内遗传及亚种分化研究(食肉目:浣熊科)

到目前为止,多数学者认为小熊猫种内已分指名亚种A.f.fulgens和川西亚种A.f.styani。然而,由于其个体毛色变异较大,一些学者对其亚种分化问题提出质疑。本文采用DNA指纹方法,对小熊猫的种内遗传和亚种分化进行了研究。结果表明,川西亚种所有个体在分子量约为8.4kb处均有一条指名亚种不具有的共有谱带,指名亚种所有个体则在分子量约为1.8kb处具有另外一条川西亚种不具有的共有谱带,且这两条谱带可通过双亲遗传给子代,说明此共有谱带可分别作为区分小熊猫川西亚种和指名亚种的特征带。另外,种内的遗传分化研究表明,川西亚种基因组的多态性强于指名亚种,且川西亚种内各个体之间的遗传变异高于指各亚种,说明小熊猫种内已形成遗传分化。因此,笔者认为以上研究结果为基因水平上进一步证明小熊猫种内已产生遗传分化,并形成两独立亚种,目前的亚种地位成立。     

羚牛保护之科学观

<正>羚牛是一种栖息于高山或亚高山地区的大型偶蹄类动物,在我国主要分布在陕西、甘肃、四川、云南和西藏。羚牛有4个亚种,即:秦岭亚种、四川亚种、指名亚种以及不丹亚种,其中前两者为中国所特有。在上世纪60年代我国发布的"关于积极保护和合理利用野生动物资源的指示"中,羚牛被列为国家一级保护野生动物。客观地说,羚牛在野外的数量     

大石鸡亚种分化及一新亚种描述(鸡形目,雉科)

通过地理分布、形态差异、分子进化证明了我国特有种大石鸡Alectoris magna分化为两个亚种,指名亚种A.magna magna和兰州亚种新亚种A.magna lanzhouensis subsp.nov..对新亚种与指名亚种的形态进行了比较.测新亚种12个和指名亚种7个样本的mtDNA控制区486个碱基,两个亚种间无共享单倍型,其间基因交流受到限制;新亚种各取样种群间共享一种单倍型,说明它们来自共同祖先;新亚种序列变异0.27%,而指名亚种为0.91%,其间差异显著(t=1.77,p=0.046＜0.05);两个亚种间的遗传距离为0.0103,约50万年前它们分歧进化.     

沙地沟芫菁指名亚种在中国首次发现(鞘翅目:芫菁科)

报道采自中国新疆的沟芫菁属1新记录亚种——沙地沟芫菁指名亚种Hycleus tekkensis tekkensis (Heyden,1883),提供其特征图、整体图及生境照片,并首次根据鞘翅斑纹将其分为4种类型.观察标本分别保存在河北大学博物馆和新疆大学昆虫标本室.     

基于线粒体细胞色素b基因序列探讨红喉姬鹟两亚种的分类地位

以线粒体DNA细胞色素b基因的全序列作为遗传标记 ,探讨红喉姬普通亚种 (Ficedulaparvaal bicilla)和指名亚种 (F .p .parva)的分类地位。应用Kimura 2 parameter法计算出红喉姬普通亚种个体间的遗传距离为 0 1%～ 0 2 % ,而与指名亚种之间的遗传距离为 6 4 % ,两亚种之间的遗传距离远远大于种间的遗传距离。结合形态学的特征我们认为 :红喉姬指名亚种和普通亚种应为两个独立种 ,分别为红喉姬 (F .albicilla)和红胸姬 (F .parva) ,两者的分化时间为 3 15～ 3 2 5百万年     

中国迁粉蝶属(鳞翅目,粉蝶科)基于NDⅠ和COⅠ基因部分序列的系统发育关系

测定了中国迁粉蝶属3种4亚种以及迁粉蝶指名亚种5个生态型的线粒体COⅠ基因和NDⅠ基因部分序列,以灵奇尖粉蝶为外群,分别采用最大简约法、最大似然法和贝叶斯法构建分子系统树,探讨了中国迁粉蝶属3种4亚种间的系统发育关系,并首次明确了迁粉蝶指名亚种5个生态型的亲缘关系。结果显示在测得的COⅠ基因661bp序列和NDⅠ基因472bp序列中,有变异位点227个,简约位点119个,A+T含量(75.5%)明显偏高。迁粉蝶属4亚种分子系统关系为:(镉黄迁粉蝶指名亚种+((梨花迁粉蝶指名亚种+梨花迁粉蝶海南亚种)+迁粉蝶指名亚种)),迁粉蝶指名亚种5个生态型分子系统关系为:(无纹型+((有纹型+红角型)+(银斑型+血斑型)))。     

大多毛蚤一新亚种记述(蚤目:多毛蚤科)

近年,从云南采到多毛蚤(Hystrichopsylla Tiraboschi,1904)一种,经鉴定系一新亚种。兹命名为:大多毛蚤云南亚种 Hystrichopsylla weida yunnanensis,ssp.nov. 鉴别特征 与大多毛蚤指名亚种(H.weida weida Jameson ＆ Hsieh,1967)的重要区别是:1)腹部,第一一五背板的端小刺较指名亚种者多。(2),第八腹部端部斜削成刀形(末端很尖),腹缘鬃多而密,指名亚种者狭窄成棒状(末端并不很尖),腹缘鬃少而     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.     

鸡传染性法氏囊病病毒研究进展

传染性法氏囊病(Infection bursal disease, IBD)是由鸡传染性法氏囊病毒(Infectious bursal disease virus, IBDV)引起的鸡和火鸡的一种高度接触性传染病,给世界各国的禽养殖业带来了巨大损失.自IBDV发现至今新的变异株不断出现,分子结构的改变导致病毒致病力的改变及宿主对疫苗应答的改变,使得传统的疫苗已不能控制其流行,因此各国学者对其基因组结构和功能进行了广泛深入的研究,并积极研制新型有效的疫苗以达到防治的目的.     

Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2

In conclusion, the novel visual RT-LAMP assay is a simple, rapid, and sensitive approach for detection of SARS-CoV-2, and it is ready for application in primary care and community hospitals or health care centers, and even patients' own houses in response to the current SARS-CoV-2 epidemic because the assay does not require sophisticated equipment and skilled personnel. Furthermore, it is also ready to be used in fields for screening samples from wild animals and environments to facilitate the identification of potential intermediate hosts that mediate the cross-species transmission of SARS-CoV-2 from bats to humans.     

Perinatal Vertical Transmission of Chikungunya Virus in Ruili,a Town on the Border between China and Myanmar

正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016).     

Enterovirus 71 3C proteolytically processes the histone H3 N-terminal tail during infection

Highlights
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions.