期刊文献+
共找到9篇文章
< 1 >
每页显示 20 50 100
中国滇西地区葡萄炭疽病病原菌的鉴定及其杀菌剂筛选
1
作者 苏奇倩 何鹏搏 +7 位作者 何俊 张华玲 周会明 冯之俊 谢艳兰 苏向宇 于龙凤 谭万忠 《西南大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第8期31-44,共14页
本研究旨在弄清滇西地区葡萄炭疽病的病原菌及筛选有效抑制病原菌的杀菌剂.从云南西部不同地区采集葡萄病叶样品,通过分离培养和纯化共获得13株真菌纯培养,经离体叶片接种证病试验验证,其中7株刺盘孢真菌(编码PT23-01~PT23-07)为葡萄炭... 本研究旨在弄清滇西地区葡萄炭疽病的病原菌及筛选有效抑制病原菌的杀菌剂.从云南西部不同地区采集葡萄病叶样品,通过分离培养和纯化共获得13株真菌纯培养,经离体叶片接种证病试验验证,其中7株刺盘孢真菌(编码PT23-01~PT23-07)为葡萄炭疽病的致病菌.通过PCR扩增获得这7个致病菌株的内转录间区(ITS)、肌动蛋白、钙调蛋白、组蛋白3和β-微管蛋白2基因(ACT,CAL,HIS3,TUB2)序列并提交到NCBI GenBank,用Megablast软件在线进行Blast-n比对结果显示,这7个菌株与刺盘孢属相应种类的相似性分别达到99.27%~100%.进一步用MEGA7.0构建基于4个蛋白基因的系统演化树分析,其显示PT23-01,PT23-03,PT23-04和PT23-05与盘长孢刺盘孢(Colletotrichum gloeosporioides jo.3)聚于同一末端分枝(BT=100),PT23-2和PT23-07与果生刺盘孢(C.fructicola AV103)处于同一分枝(BT=94),而PT23-06则与暹罗刺盘孢(C.siemense ABS125375)聚为同一分枝(BT=98),这与Blast-n比对的结果一致.在所鉴定的3种病菌中,C.gloeosporioides是优势病原菌,从滇西各地区样品中均被分离到;而C.siemense在文献中尚未见有侵染葡萄的报道,是导致葡萄炭疽病的一种新病原菌;本研究简要地描述了这3种病菌的形态特征.通过菌落生长法测定,8种供试杀菌剂都能不同程度地抑制盘长孢刺盘孢的菌落生长,不同供试药剂对同一种菌的抑菌效果没有显著差异(p>0.05).25%甲硫乙唑醇SA和30%苯甲吡唑脂SA的抑制作用最强,抑菌率分别达92.25%和95.87%(p<0.01),EC 50值分别为1.103 mg/mL和1.521 mg/mL.室内测定结果显示,两种药剂对葡萄炭疽病也具有很好的控制效果,控病率分别达到85.03%和91.54%(p<0.01).本研究结果为滇西地区葡萄炭疽病的正确诊断鉴定和有效控制奠定了科学基础. 展开更多
关键词 葡萄炭疽病 多基因鉴定 刺盘孢菌 杀菌剂筛选 抑菌控病效果
原文传递
广西烟草炭疽病病原鉴定及生物学特性研究
2
作者 石洁 桑维钧 +4 位作者 卢燕回 张得平 孔菲 首安发 杨茂发 《中国烟草科学》 CSCD 北大核心 2023年第5期70-78,共9页
为明确广西壮族自治区贺州市钟山县发生的真菌性叶斑病害的病原菌种类和生物学特性,分别采用组织分离法和活体伤口接种法对病原菌进行分离和致病性测定,利用PCR扩增病原菌核糖体内转录间隔区(ITS)、肌动蛋白(ACT)和几丁质合成酶(CHS)进... 为明确广西壮族自治区贺州市钟山县发生的真菌性叶斑病害的病原菌种类和生物学特性,分别采用组织分离法和活体伤口接种法对病原菌进行分离和致病性测定,利用PCR扩增病原菌核糖体内转录间隔区(ITS)、肌动蛋白(ACT)和几丁质合成酶(CHS)进行分子鉴定,结合形态学特征对病原菌种类进行鉴定,采用菌丝生长速率法测定病原菌生物学特性。聚类分析结果表明,病原菌与平头炭疽(Collettrichum truncatum)聚为一支,且支持率为100%,结合形态学特征,将病原菌鉴定为平头炭疽(C.truncatum),这是平头炭疽寄生烟草引起烟草炭疽病的首次报道。病原菌生物学特性测定结果表明,病原菌对环境有较强的适应性,最适培养基为营养琼脂(NA),最适温度30℃,最适光照条件为全黑暗,最适碳源为淀粉,最适氮源为蛋白胨,pH为7时病原菌生长最快,病原菌致死温度为53℃、10 min。研究结果为病害的及时准确防治和深入研究提供了理论依据。 展开更多
关键词 烟草 炭疽病 病原菌鉴定 多基因分子鉴定 生物学特性
下载PDF
贵州油茶叶枯病病原鉴定研究 被引量:1
3
作者 秦绍钊 刘文霞 +1 位作者 李御企 王洪 《农业与技术》 2019年第23期16-17,共2页
本研究采用形态学鉴定及多基因分子鉴定的方法,对贵州省油茶叶枯病病原进行分离、纯化和鉴定。根据形态特征,结合ITS1-TUB2基因所构建的系统发育树综合鉴定,结果表明本研究分离致病菌为拟盘多毛孢属的小孢拟盘多毛孢菌(Pestalotiopsis m... 本研究采用形态学鉴定及多基因分子鉴定的方法,对贵州省油茶叶枯病病原进行分离、纯化和鉴定。根据形态特征,结合ITS1-TUB2基因所构建的系统发育树综合鉴定,结果表明本研究分离致病菌为拟盘多毛孢属的小孢拟盘多毛孢菌(Pestalotiopsis microspora)。分离菌株KLXY-7-3与Genbank中同源性较高的菌株序列比对分析,分别与小孢拟盘多毛孢菌MF375901.1、MK409844.1菌株聚为一个独立的进化分支,且置信度为99%。本研究系统调查采集贵州油茶主要种植区的典型病样,可为该病原菌发生规律及防治时期的研究提供理论依据。 展开更多
关键词 油茶叶枯病 小孢拟盘多毛孢菌 形态学 多基因鉴定
下载PDF
西番莲顶枯病病原菌的分离与鉴定 被引量:3
4
作者 黄艳花 崔忠吉 +3 位作者 欧善生 黄远光 蒙成 李杨秀 《西南农业学报》 CSCD 北大核心 2022年第8期1826-1832,共7页
【目的】鉴定西番莲顶枯病病原菌种类,明确其分类地位,为西番莲顶枯病的科学防控及西番莲产业的持续快速发展提供理论依据。【方法】采用植物组织分离法对首次在广西南宁市发现为害西番莲的新病害——西番莲顶枯病进行病原菌分离,测定... 【目的】鉴定西番莲顶枯病病原菌种类,明确其分类地位,为西番莲顶枯病的科学防控及西番莲产业的持续快速发展提供理论依据。【方法】采用植物组织分离法对首次在广西南宁市发现为害西番莲的新病害——西番莲顶枯病进行病原菌分离,测定其致病性,观察其形态特征,分析其核糖体转录间隔区(ITS)、钙调蛋白(CAL)和交配型基因(ApMat)的基因序列,鉴定引起西番莲顶枯病的病原菌。【结果】从具有典型西番莲顶枯病症状植株中分离到同一形态真菌,命名为TK2A2CLA6菌株,其孢子与自然发病西番莲枝条上切片观察到的病原菌孢子形态一致,进行顶芽接种致病性测定均能发病,且发病症状与自然发病症状一致,再分离得到的病原菌与原接种病原菌相同。TK2A2CLA6菌株菌落圆形或近圆形,正面产生发达且较致密的灰白色气生菌丝;菌落背面初期为浅黄色,后期中央浅墨色、周围浅黄色,在PDA培养基上培养7 d后偶有橙色孢子堆产生;菌丝平均生长速率为18.89 mm/d;分生孢子无色,近圆柱状钝圆,另一端钝圆或略细,一般具1~2个油球,大小为(13.03~17.75)μm×(3.75~5.25)μm。对TK2A2CLA6菌株的ITS V1~V4区、CAL和ApMat基因序列进行PCR扩增,将基因序列在NCBI中进行BLAST比对分析,发现其与暹罗炭疽菌(Colletotrichum siamense)多个序列的同源性达100%。以ITS、CAL和ApMat基因序列进行多基因系统发育进化树分析,TK2A2CLA6菌株与C.siamense LF177和C.siamense JH-Coll001以100%的自展支持率聚为独立的1支,确定引起西番莲顶枯病的致病菌为暹罗炭疽菌。【结论】使用形态学方法结合多基因系统进化树分析,明确危害广西南宁西番莲顶枯病的病原菌为暹罗炭疽菌。 展开更多
关键词 西番莲 顶枯病 病原菌 多基因鉴定 暹罗炭疽菌(Colletotrichum siamense) 广西南宁市
下载PDF
烟草叶斑病新病原分离鉴定及其生物学特性测定 被引量:3
5
作者 杨江敏 桑维钧 +7 位作者 孔菲 李昊熙 卢燕回 顾恒锋 首安发 甘国喜 彭丽娟 杨茂发 《南方农业学报》 CAS CSCD 北大核心 2022年第6期1634-1644,共11页
【目的】明确广西贺州烟区一种烟草真菌性叶斑病害的病原菌种类和生物学特性,为病害的及时防控和后续研究提供理论参考。【方法】采用组织分离法对从广西贺州烟区采集的具明显叶斑病症状的烟草叶片组织进行病原菌分离纯化,利用柯赫氏法... 【目的】明确广西贺州烟区一种烟草真菌性叶斑病害的病原菌种类和生物学特性,为病害的及时防控和后续研究提供理论参考。【方法】采用组织分离法对从广西贺州烟区采集的具明显叶斑病症状的烟草叶片组织进行病原菌分离纯化,利用柯赫氏法则验证其致病性;通过形态学结合多基因(ITS、LSU、TUB2、RPB2)序列联合分析对病原菌进行种类鉴定;应用十字交叉法测定病原菌的生物学特性。【结果】经分离纯化共获得7株菌株,通过柯赫氏法则证明7株菌株均为烟草品种K326的叶斑病病原菌,7株菌株间的致病力无明显差异。基于ITS、LSU、RPB2和TUB2构建的系统发育进化树显示,7株菌株均与菌株Stagonosporopsis vannaccii LFN0148和S.vannaccii YTH-12聚为一支,且支持率为100%。生物学特性测定结果表明,7株菌株菌丝生长的最适温度为25~28℃,最适碳源为可溶性淀粉,最适氮源为蛋白胨和牛肉浸粉,最适pH为6~9;适宜培养基为马铃薯葡萄糖培养基(PDA)、燕麦培养基(OA)和南瓜汁琼脂培养基(PA),在全光照条件下菌丝生长最快,最低致死温度为50℃水浴10 min。【结论】引起广西贺州烟区烟草叶斑病的病原菌为S.vannaccii,该病原菌喜好在弱酸性至弱碱性、光照充足且营养丰富的环境条件下生长。在烟草生产过程中可通过控制烟草种植密度、加强田间管理以及采取化学、生物防治等方法对由S.vannaccii引起的烟草叶斑病进行综合防控。 展开更多
关键词 烟草叶斑病 病原菌 多基因分子鉴定 生物学特性 广西贺州
下载PDF
Association betweenITGA2 C807T polymorphism and gastric cancer risk 被引量:7
6
作者 Jie Chen Nan-Nan Liu +7 位作者 Jia-Qi Li Li Yang Ying Zeng Xiao-Mei Zhao Lin-Lin Xu Xuan Luo Bin Wang Xue-Rong Wang 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第23期2860-2866,共7页
AIM: To evaluate the impact of the ITGA2 gene polymorphism on gastric cancer risk. METHODS: A hospital-based case-control study was conducted, including 307 gastric cancer patients and 307 age- and gender-matched co... AIM: To evaluate the impact of the ITGA2 gene polymorphism on gastric cancer risk. METHODS: A hospital-based case-control study was conducted, including 307 gastric cancer patients and 307 age- and gender-matched control subjects. The genotypes were identified by polymerase chain reaction-restriction fragment length polymorphism assay. RESULTS: The frequencies of the wild and variant genotypes in cases were significantly different from those of controls (P = 0.019). Compared with individuals with the wild genotype CC, subjects with the variant genotypes (CT + IT) had a significantly higher risk of gastric cancer (adjusted odds ratio = 1.57, 95% CI = 1.13-2.17, P = 0.007). In stratified analyses, the elevated gastric cancer risk was especially evident in older individuals aged 〉 58 years, nonsmokers and rural subjects. Further analyses revealed that the variant genotypes were associated with poor tumor differentiation and adjacent organ invasion in the sub-analysis of gastric cancer patients. CONCLUSION: The ITGA2 gene C807T polymorphism may be associated with an increased risk of gastric cancer, differentiation and invasion of gastric cancer. 展开更多
关键词 Gastric cancer INTEGRIN ITGA2 Polymor-phism GENOTYPE
下载PDF
Association of myostatin Variants with Growth Traits of Zhikong Scallop(Chlamys farreri) 被引量:2
7
作者 FU Qiang GUO Huihui +5 位作者 FENG Liying LI Xue ZHANG Lingling WANG Shi HU Xiaoli BAO Zhenmin 《Journal of Ocean University of China》 SCIE CAS 2016年第1期145-151,共7页
Scallop is a popular sea food and an important aquaculture shellfish.Identification of genes and genetic variants relating to scallop growth could benefit high-yielding scallop breeding.Myostatin(MSTN) is a conservati... Scallop is a popular sea food and an important aquaculture shellfish.Identification of genes and genetic variants relating to scallop growth could benefit high-yielding scallop breeding.Myostatin(MSTN) is a conservative regulator of muscle growth,and has become one of the most important target genes for genetic improvement of the production of farmed animals.In this study,four single nucleotide polymorphisms(SNPs) were identified in the 5' flanking region of MSTN gene(Cf MSTN) in Zhikong scallop(Chlamys farreri).The association of these SNPs with scallop growth traits,including shell length,shell height,body weight and striated muscle weight was analyzed.The SNP g-1162G>T was found to associate with shell length,shell height,and striated muscle weight.The TT type scallops showed significantly higher trait values than those of GT type,and the GG type individuals exhibited median values.On the contrary,significantly more Cf MSTN transcripts were detected in the striated muscle of GT type scallops than in those of TT and GG type ones.Our results suggested that Cf MSTN might regulate the scallop muscle growth negatively,and SNP g-1162G>T can be used as a candidate marker for the selective breeding of high-yielding scallop. 展开更多
关键词 Zhikong scallop Chlamys farreri MYOSTATIN single nucleotide polymorphism growth trait EXPRESSION association analysis
下载PDF
A novel male-specific SET domain-containing gene setdm identified from extra microchromosomes of gibel carp males 被引量:5
8
作者 Xi-Yin Li Xiao-Li Liu +4 位作者 Miao Ding Zhi Li Li Zhou Xiao-Juan Zhang Jian-Fang Gui 《Science Bulletin》 SCIE EI CAS CSCD 2017年第8期528-536,共9页
Various genes have been screened on extra chromosomes, but their molecular characterization, expression pattern and biological function are still unclear. Here, we utilized a male-specific sequence of polyploid gibel ... Various genes have been screened on extra chromosomes, but their molecular characterization, expression pattern and biological function are still unclear. Here, we utilized a male-specific sequence of polyploid gibel carp (Carassius gibelio) to identify a novel male-specific SET (Su(var)3-9, Enhancer- of-zeste, Trithorax) domain-containing gene setdm on extra microchromosomes of gibel carp males. And setdm was characterized in molecule and expression aspects, in which its expression was specific to testis, and had relative high transcription during middle/late stages of testis development. Moreover, prominent expression of Setdm in spermatogenic cells was observed in testis through immunofluorescence co-localization analysis. These results suggest that biological function of setdrn might be related to testis development and spermatogenesis of gibel carp. Additionally, the homeologous gene setdmf of setdm, was also characterized, and its expression was gonad-specific, in which its expressed product was detected to mainly distribute in gametogenic cells of testis and ovary, and to have dynamic expression pattern similar to that of setdm. Based on the current results, we propose that the novel male-specific setdm on extra microchromosomes might be functional divergence gene of the gonad-specific setdmf. Therefore, these findings will help us to further understand evolutionary fate and functional role of genes on extra microchromosomes. 展开更多
关键词 Microchromosomes Snpernumerary chromosomes Sex determination SPERMATOGENESIS POLYPLOID
原文传递
Identification of four SNPs and association analysis with meat quality traits in the porcine Pitx2c gene 被引量:1
9
作者 WU WangJun ZUO Bo +5 位作者 REN ZhuQing HAPSARI A.A.R LEI MingGang XU DeQuan LI FengE XIONG YuanZhu 《Science China(Life Sciences)》 SCIE CAS 2011年第5期426-433,共8页
The association of the porcine Pitx2c gene with meat quality traits was investigated in the present study. A total of eight single nucleotide polymorphisms (SNPs) were found. Allele frequencies of four SNPs were fur... The association of the porcine Pitx2c gene with meat quality traits was investigated in the present study. A total of eight single nucleotide polymorphisms (SNPs) were found. Allele frequencies of four SNPs were further detected in four commercial breeds and eight Chinese indigenous breeds. Single SNP and meat quality associations were analyzed in a YorkshirexMeishan F2 population. The SNPs c.474C〉T (P〈0.01) and c.636C〉T (P〈0.05) showed a significant association with meat color (MCV1). The SNPs c,*37G〉A and c.*47G〉A were significantly associated with drip loss rate (DLR), water holding capacity (WHC) and meat color value (MCV1) consistently (P〈0.05). Linkage disequilibrium (LD) analysis revealed that the adjacent SNPs were in LD. Two major haplotypes were identified, and association analysis between haplotype combinations and meat quality indicated that the presence of two copies of haplotype 1 -CCGG- may improve meat quality. 展开更多
关键词 association HAPLOTYPE Pitx2c meat quafity PIG
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部