The circulation of unique reassortment strains of infectious bursal disease virus in Pakistan          下载免费PDF全文

Altaf HUSSAIN  WU Tian-tian  FAN Lin-jin  WANG Yu-long  Farooq Khalid MUHAMMAD  JIANG Nan  GAO Li  LI Kai  GAO Yu-long  LIU Chang-jun  CUI Hong-yu  PAN Qing  ZHANG Yan-ping  Asim ASLAM  Khan MUTI-UR-REHMAN  Muhammad Imran ARSHAD  Hafiz Muhammad ABDULLAH  WANG Xiao-mei  QI Xiao-le 《农业科学学报》2020,19(7):1867-1875

Infectious bursal disease(IBD), caused by IBD virus(IBDV), is one of the most devastating and immunosuppressive diseases of the poultry and has been a constraint on the sustainable poultry production around the globe including Pakistan. While the disease is threatening the poultry industry, the nature of predominant strains of IBDV in Pakistan remained ill-defined. In this study, an epidemiology survey was conducted in the main chicken-farming regions of Pakistan. The batch of Pakistan IBDVs genes simultaneously covering both VP1 and VP2 were amplified, sequenced, and analyzed. The unique segmentreassortant IBDVs(vv-A/Uniq-B), carrying segment A from vvIBDV and segment B from one unique ancestor, were identified as one important type of circulating strains in Pakistan. The data also discovered the characteristic molecular features of Pakistan IBDVs, which will contribute to scientific vaccine selection and effective prevention of the disease.  相似文献   

玉米野生近缘属-摩擦禾属的研究和利用     

赵艳丽  温小冬  孙汝龙  Muhammad Zafar Iqbal  严旭  鲜凤君  李华雄  蒋维明  李晓锋  张萍  杨春燕  荣廷昭  唐祈林 《玉米科学》2020,28(2):1-10

摩擦禾属于禾本科玉蜀黍族摩擦禾属,起源于美洲,与玉米、大刍草具有共同祖先,其在玉米的起源与进化过程中可能扮演着重要角色。摩擦禾是一种多年生暖季型丛生C4禾草,常用于优质饲草料生产、控制土壤侵蚀和生物质能源。其作为玉米的近缘属材料,保存有栽培玉米不具有的优质、抗病、抗寒、耐涝、耐盐和多年生等多种优良基因,是拓展玉米遗传基础的重要种质。本文从摩擦禾属的习性和分布、摩擦禾属的分类、摩擦禾属的种间可杂交性、摩擦禾属与玉蜀黍属杂交性、摩擦禾属的优良特性和摩擦禾基因向玉米转移的途径等方面进行综述,为摩擦禾属的研究和利用提供参考。  相似文献   

Pathogen-induced Defense Strategies in Plants     

Imran  Qari Muhammad  Yun  Byung-Wook 《Journal of Crop Science and Biotechnology》2020,23(2):97-105

Journal of Crop Science and Biotechnology - Plants are the ultimate producers of this ecosystem and effect human life directly and/or indirectly. However, being sessile organisms, plants are...  相似文献   

The direct and indirect effects of China's wastewater treatment service on urban household wastewater discharge     

Jiajia Zheng  Muhammad Abdul Kamal  Assad Ullah 《Growth and change》2020,51(3):1380-1400

Urban household wastewater has surged with the urbanization in China, treatment of which demands attention. Utilizing China’s urban panel data from 2005 to 2015, this article evaluates whether governmental wastewater treatment service changes urban residents’ wastewater-discharging behaviors. The outcomes reveal that: (a) in the short-run when the local government treats more wastewater, the residents discharge more wastewater; (b) this short-run relationship is notably strengthened by household attributes, that is, income and education; (c) in the long-run, the increasing relationship between household wastewater discharge and wastewater treatment service also exists significantly, which calls for immediate attention of policy makers.  相似文献   

Identification and characterization of important sterile and maintainer lines from various genotypes for advanced breeding programmes of onion (Allium cepa)     

Rafiq Ahmad  Mahmood-ul- Hassan  Ghanan B. Akhtar  Sadia Saeed  Sabaz A. Khan  Muhammad Kausar Nawaz Shah  Nadeem Khan 《Plant Breeding》2020,139(5):988-995

Onion is one of the major vegetable crops in terms of production as well as consumption. In the current research, available onion genetic stock was evaluated to identify male-sterile lines and produce high-yielding F₁ hybrids for future breeding programmes. A mitochondrial DNA-based marker was mapped and correlated with phenotypic traits to isolate male-sterile plants. Based on the floral and pollen structure, nine putative male-sterile lines were identified. On the other hand, for nuclear marker identification at Ms locus, two sets of primers were used, one for Ms dominant allele and another for sterile and maintainer plants. Results revealed that 70% of open pollinated varieties (OPVs) possess plants with sterile cytoplasm coupled with genetic sterility at Ms locus, called sterile “A” line. Approximately 20% of plants in some genotypes were identified with normal (N) cytoplasm having recessive fertility gene at Ms locus, called maintainer “B” line. Based on the present findings, “A”, “B” and “R” (restorer line), future F₁ hybrid seed production systems in onion is discussed.  相似文献   

Gossypol‐induced fitness gain and increased resistance to deltamethrin in beet armyworm,Spodoptera exigua (Hübner)     

Muhammad Hafeez  Sisi Liu  Saad Jan  Bahar Ali  Muhammad Shahid  G Mandela Fernndez‐Grandon  Muhammad Nawaz  Aqeel Ahmad  Mo Wang 《Pest management science》2019,75(3):683-693

  相似文献   

Modelling the potential distribution of arbovirus vector Aedes aegypti under current and future climate scenarios in Taiwan,China     

Boyang Liu  Zhihui Jiao  Jun Ma  Xiang Gao  Jianhua Xiao  Muhammad A Hayat  Hongbin Wang 《Pest management science》2019,75(11):3076-3083

  相似文献   

Impact of acute oral exposure to thiamethoxam on the homing,flight, learning acquisition and short‐term retention of Apis cerana     

Changsheng Ma  Yongkui Zhang  Jia Sun  Muhammad Imran  Huipeng Yang  Jie Wu  Yi Zou  Hongmei Li‐Byarlay  Shudong Luo 《Pest management science》2019,75(11):2975-2980

  相似文献   

Identification of natural weed hosts of Cucumber mosaic virus subgroup-I and the absence of seed transmission in weed hosts in Pakistan     

Khalid Pervaiz Akhtar  Marium Anwer  Muhammad Yussouf Saleem  Sumaira Yousaf  Najeeb Ullah  Hafiza Massoma Naseer Cheema 《The Journal of Horticultural Science and Biotechnology》2019,94(4):468-474

  相似文献   

Purification and characterization of glycerolipid acyl-hydrolase from the red alga Gracilaria vermiculophylla     

Muhammad I Illijas  Masaru Terasaki  Ryo Nakamura  Noriaki Iijima  Akihiko Hara  Nobuhiro Fusetani  Yutaka Itabashi 《Fisheries Science》2008,74(3):670-676

ABSTRACT:   A glycerolipid acyl-hydrolase was purified 19-fold with a yield of 11% from the prostaglandin-producing red alga Gracilaria vermiculophylla by ammonium sulfate precipitation, anion-exchange chromatoraphy and gel filtration chromatography. Sodium dodecylsulfate– polyacrylamide gel electrophoresis of the final preparation showed a single band corresponding to a molecular mass of 20 kDa, but Superdex 200 fast protein liquid chromatography exhibited a molecular mass of 40 kDa. Accordingly, it was suggested that the purified enzyme was a homodimer of a 20 kDa subunit. The optimal temperature and pH were 37°C and 7–8, respectively. The purified enzyme catalyzed hydrolysis of the acyl groups of both glycoglycerolipids and phospholipids, especially monogalactosyldiacylglycerol and phosphatidylcholine. These results suggest that the enzyme hydrolyze the membrane lipids of the alga to release various saturated and unsaturated fatty acids, including arachidonic acid as substrate for prostaglandin synthesis.  相似文献