[Objectives]The paper was to explore the occurrence and mixed infection of sugarcane bacilliform virus disease in Hainan sugarcane-growing area.[Methods]A total of 348 sugarcane leaf samples were collected from 7 suga...[Objectives]The paper was to explore the occurrence and mixed infection of sugarcane bacilliform virus disease in Hainan sugarcane-growing area.[Methods]A total of 348 sugarcane leaf samples were collected from 7 sugarcane-growing areas in Hainan Province.Molecular detection of sugarcane bacilliform virus(SCBV)was carried out by PCR using specific primers.[Results]SCBV was detected in 244 out of 348 sugarcane samples,with an average detection rate of 70.11%.The highest detection rate was 76.66%in the Danzhou sugarcane-growing area,while the lowest was 57.14%in the Baisha sugarcane-growing area.The SCBV-positive samples were subjected to testing for SCYLV,SCSMV,SrMV,and SCMV,respectively.The results indicated that 106 out of 244 positive samples exhibited a single infection with SCBV,while 138 samples exhibited mixed infections with SCBV and other sugarcane viruses.The proportion of mixed infections among the SCBV-positive samples was as high as 56.56%.Among the various types of mixed infections,two-virus and three-virus mixed infections were the most prevalent.[Conclusions]SCBV has emerged as a significant threat to the secure production of sugarcane in the Hainan sugarcane-growing region.It presents an explosive infection in the Hainan sugarcane-growing region and frequently combines with other sugarcane viruses to infect sugarcane.The findings of this study will provide a theoretical foundation for the prevention and control of sugarcane bacilliform virus disease.展开更多
By the sequencing and analysis of genomic DNA and cDNA of WSBV, it was found that there existed a minicistron in the leading sequence of p204 gene. The minicistron utilized rare codons of genes from prawn and WSBV. Th...By the sequencing and analysis of genomic DNA and cDNA of WSBV, it was found that there existed a minicistron in the leading sequence of p204 gene. The minicistron utilized rare codons of genes from prawn and WSBV. The p204 gene could be expressed in Escherichia coli whether a miniciston exited in its leading sequence or not, but the amounts of the expressed products of them were different. The minicistron might be related to the expression of p204 gene.展开更多
Banana streak virus (BSV) and Sugarcane bacilliform virus (SCBV) are two badnaviruses commonly found in all banana growing areas of the world. It is a threat to the production and improvement of Musa germplasm. In Bur...Banana streak virus (BSV) and Sugarcane bacilliform virus (SCBV) are two badnaviruses commonly found in all banana growing areas of the world. It is a threat to the production and improvement of Musa germplasm. In Burkina Faso, the presence of badnaviruses was reported in banana producing regions. The objective of this study was to determine the prevalence of BSV and SCBV in banana production areas of Burkina Faso. A survey followed by a symptomatologic study was conducted in banana plantations in 27 localities of the nine main banana producing regions from July to October 2018 and September to December 2020. In all, 251 leaf samples were collected and analysed for BSV and SCBV infection by Indirect Antigen Coated Plate Assay-ELISA followed by amplification of the RT/RNase H region using Polymerase chain reaction with Badna FP/RP and SCBV F/R primers, respectively. A variety of symptoms were observed on almost all plant organs which were revealed due to BSV by symptomatologic study. The results of serological and molecular diagnosis revealed a high overall prevalence of BSV in 80.48% of the samples tested. BSV was distributed in seven survey regions out of nine with prevalence ranging from 10% to 100% in North, Centre, Centre West, Hauts Bassins, Cascades, Centre East and Boucle of Mouhoun regions. Very low prevalence was recorded for SCBV in Cascades and East Centre region with 4.35 and 12.5%, respectively. Species detection using specific primers to each species revealed three main species: Banana streak Obino l’ewaï virus (BSOLV), Goldfinger virus (BSGFV) and Imové virus (BSIMV) in the samples tested, respectively in the proportions of 23%, 8% and 0.8%. Co-infection between BSV species was also detected.展开更多
The cultivation of redclaw crayfish(Cherax quadricarinatus) is developing in recent years.The disease of Cherax quadricarinatus was one of the major factors in its culture and even caused redclaw crayfish to die.The v...The cultivation of redclaw crayfish(Cherax quadricarinatus) is developing in recent years.The disease of Cherax quadricarinatus was one of the major factors in its culture and even caused redclaw crayfish to die.The viral disease was found in polyculture of redclaw crayfish with Penaeus vannamei.Haemolymph and homogenated gills from diseased Cherax quadricarinatus was filtered and injected to the healthy Cherax quadricarinatus and all injected animals died within 3-5 days,while animals injected with other tissues including hepatopancrease and stomach were still alive.Examination by electron microscopy showed that there were a number of bacilliform viral particles in the nuclei of haemolymph and gill tissues.The virions varied in(225.6-280.5) nm×(73.2-176.8) nm.The detection of the gills and haemolymph by nucleic acid probe and PCR proved that the virus from Cherax quadricarinatus was similar to WSSV.The BLAST results of the sequence showed that it has 100% homology with respect to sequence of AF332093.The sequence reported in this paper has been deposited in the GenBank database(accession number EF078890).The results indicated that this virus belongs to WSSV Chinese.The C.quadricarinatus bacilliform virus could be detected by WSSV nucleic acid probe and PCR.展开更多
基金Supported by Hainan Provincial Natural Science Foundation of China(321QN313,323MS103)Earmarked Fund for China Agricultural Research System(CARS-17).
文摘[Objectives]The paper was to explore the occurrence and mixed infection of sugarcane bacilliform virus disease in Hainan sugarcane-growing area.[Methods]A total of 348 sugarcane leaf samples were collected from 7 sugarcane-growing areas in Hainan Province.Molecular detection of sugarcane bacilliform virus(SCBV)was carried out by PCR using specific primers.[Results]SCBV was detected in 244 out of 348 sugarcane samples,with an average detection rate of 70.11%.The highest detection rate was 76.66%in the Danzhou sugarcane-growing area,while the lowest was 57.14%in the Baisha sugarcane-growing area.The SCBV-positive samples were subjected to testing for SCYLV,SCSMV,SrMV,and SCMV,respectively.The results indicated that 106 out of 244 positive samples exhibited a single infection with SCBV,while 138 samples exhibited mixed infections with SCBV and other sugarcane viruses.The proportion of mixed infections among the SCBV-positive samples was as high as 56.56%.Among the various types of mixed infections,two-virus and three-virus mixed infections were the most prevalent.[Conclusions]SCBV has emerged as a significant threat to the secure production of sugarcane in the Hainan sugarcane-growing region.It presents an explosive infection in the Hainan sugarcane-growing region and frequently combines with other sugarcane viruses to infect sugarcane.The findings of this study will provide a theoretical foundation for the prevention and control of sugarcane bacilliform virus disease.
文摘By the sequencing and analysis of genomic DNA and cDNA of WSBV, it was found that there existed a minicistron in the leading sequence of p204 gene. The minicistron utilized rare codons of genes from prawn and WSBV. The p204 gene could be expressed in Escherichia coli whether a miniciston exited in its leading sequence or not, but the amounts of the expressed products of them were different. The minicistron might be related to the expression of p204 gene.
文摘Banana streak virus (BSV) and Sugarcane bacilliform virus (SCBV) are two badnaviruses commonly found in all banana growing areas of the world. It is a threat to the production and improvement of Musa germplasm. In Burkina Faso, the presence of badnaviruses was reported in banana producing regions. The objective of this study was to determine the prevalence of BSV and SCBV in banana production areas of Burkina Faso. A survey followed by a symptomatologic study was conducted in banana plantations in 27 localities of the nine main banana producing regions from July to October 2018 and September to December 2020. In all, 251 leaf samples were collected and analysed for BSV and SCBV infection by Indirect Antigen Coated Plate Assay-ELISA followed by amplification of the RT/RNase H region using Polymerase chain reaction with Badna FP/RP and SCBV F/R primers, respectively. A variety of symptoms were observed on almost all plant organs which were revealed due to BSV by symptomatologic study. The results of serological and molecular diagnosis revealed a high overall prevalence of BSV in 80.48% of the samples tested. BSV was distributed in seven survey regions out of nine with prevalence ranging from 10% to 100% in North, Centre, Centre West, Hauts Bassins, Cascades, Centre East and Boucle of Mouhoun regions. Very low prevalence was recorded for SCBV in Cascades and East Centre region with 4.35 and 12.5%, respectively. Species detection using specific primers to each species revealed three main species: Banana streak Obino l’ewaï virus (BSOLV), Goldfinger virus (BSGFV) and Imové virus (BSIMV) in the samples tested, respectively in the proportions of 23%, 8% and 0.8%. Co-infection between BSV species was also detected.
文摘The cultivation of redclaw crayfish(Cherax quadricarinatus) is developing in recent years.The disease of Cherax quadricarinatus was one of the major factors in its culture and even caused redclaw crayfish to die.The viral disease was found in polyculture of redclaw crayfish with Penaeus vannamei.Haemolymph and homogenated gills from diseased Cherax quadricarinatus was filtered and injected to the healthy Cherax quadricarinatus and all injected animals died within 3-5 days,while animals injected with other tissues including hepatopancrease and stomach were still alive.Examination by electron microscopy showed that there were a number of bacilliform viral particles in the nuclei of haemolymph and gill tissues.The virions varied in(225.6-280.5) nm×(73.2-176.8) nm.The detection of the gills and haemolymph by nucleic acid probe and PCR proved that the virus from Cherax quadricarinatus was similar to WSSV.The BLAST results of the sequence showed that it has 100% homology with respect to sequence of AF332093.The sequence reported in this paper has been deposited in the GenBank database(accession number EF078890).The results indicated that this virus belongs to WSSV Chinese.The C.quadricarinatus bacilliform virus could be detected by WSSV nucleic acid probe and PCR.
