[ Objective] In order to construct the specific equine disease-free zone of of the Guangzhou Asian Games, to ensure that the equestrian events of Guangzhou Asian Games be smoothly held. [Methods] The species, quantiti...[ Objective] In order to construct the specific equine disease-free zone of of the Guangzhou Asian Games, to ensure that the equestrian events of Guangzhou Asian Games be smoothly held. [Methods] The species, quantities, distribution and seasonal variations of insects and wild animals in related zones were investigated from 2008 to 2010, and the collected samples of the insects and wild animals were tested in laboratory for related equine diseases. [Results] The investigations indicated that there were some mosquitoes, flies, horseflies, punkies, ticks, bats, wild birds and wild bears in equastrianism venue and peripheral regions of disease-free zone of the Guangzhou Asian Games, the laboratory results of Japa- nese encephalitis, vesicular stomatitis, Nipah virus disease, West Nile fever, and Trypanosomiasis evansi, were all negative. According to the in- vestigations and test results, the risk assessments of insect and wild animal vectors in the prevalence of related equine diseases were made to con- firm that the risk was relatively low or very low, and comprehensive prevention and control measures with prevention as major measures and insecti- cides application and environment managements as supplementary means were made on the basis of the risk assessment conclusions. [ Conclu- sions] This research has laid a solid foundation for the successful building of the first specific equine disease-free zone in our country, ensured the smooth holding of the 16th equastdan competition in Guangzhou Asian Games.展开更多
Pigeonpea [Cajanus cajan (L.) Millspaugh] is an important food legume of the semi-arid tropics (SAT) sustaining livelihood of millions of people. Stagnant and unstable yield per hectare all over the world is the chara...Pigeonpea [Cajanus cajan (L.) Millspaugh] is an important food legume of the semi-arid tropics (SAT) sustaining livelihood of millions of people. Stagnant and unstable yield per hectare all over the world is the characteristic feature of this crop. This is primarily ascribed to its susceptibility/sensitivity to a number of biotic and abiotic factors. Among biotic factors, insects such as pod borer (Helicoverpa armigera), pod fly (Melanoagromyza obtusa) and spotted borer (Maruca vitrata) substantially damage the crop and result in significant economic losses. Management of these insects by genetic means has always been considered environment friendly approach. However, genetic improvement has always been impeded by limited genetic variability in the primary gene pool of pigeonpea. Wild species present in the secondary and tertiary gene pools have been reported to carry resistance for such insects. However, transfer of resistance through conventional backcrossing has not been much successful. It calls for gene introgression through marker assisted backcrossing (MABC) or advanced backcross breeding (AB breeding). In this review, we have attempted to assess the progress made through conventional and molecular breeding and suggested the ways to move further towards genetic enhancement for insects resistance in展开更多
云南省是我国大蚕蛾科(Saturniidae)绢丝昆虫资源最为丰富的地区之一。利用DNA条形码技术对采自云南省楚雄地区的一种野生绢丝昆虫进行分子鉴定,并调查其茧质性状。提取该野生绢丝昆虫的蛹基因组DNA,以昆虫线粒体细胞色素C氧化酶亚基Ⅰ...云南省是我国大蚕蛾科(Saturniidae)绢丝昆虫资源最为丰富的地区之一。利用DNA条形码技术对采自云南省楚雄地区的一种野生绢丝昆虫进行分子鉴定,并调查其茧质性状。提取该野生绢丝昆虫的蛹基因组DNA,以昆虫线粒体细胞色素C氧化酶亚基Ⅰ基因(mt DNA COⅠ)片段通用引物PCR扩增,获得一段长度为574 bp的mt DNA COⅠ基因片段(Gen Bank登录号:KR812471)。基于mt DNA COⅠ基因序列比对,该野生绢丝昆虫与柞蚕属(Antheraea)的明目大蚕蛾(A.frithi)同源序列的相似度为99.47%。应用Kimura-2-Parameter模型计算该野生绢丝昆虫与2种明目大蚕蛾及其他19种柞蚕属绢丝昆虫的遗传距离,结果显示其与明目大蚕蛾的遗传距离仅为0.005;构建的进化树中,该野生绢丝昆虫也是最先与明目大蚕蛾聚在一起。此外,该野生绢丝昆虫的成虫形态特征与已有文献描述明目大蚕蛾的特征相符。综合分子鉴定结果与成虫的形态特征,确认该野生绢丝昆虫为明目大蚕蛾(Antheraea frithi)。供试明目大蚕蛾所生产的茧为黄褐色,有茧柄,无茧孔,平均茧大小为20 mm×38 mm,平均单粒茧质量6.55 g,平均茧层率10.8%,初步认为具有潜在的开发利用价值。展开更多
基金the help and strong support of Departments the Chinese Animal Health and Epidemic Center,Guangdong Rsearch Institute of Entomology,Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences,the Agriculture,Fisheries and Conservation Department of Hong Kong and the Hong Kong Jockey Club etc.,during the entomophily and wild animals prevention and control in the disease-free zone of Guangzhou Asian Games
文摘[ Objective] In order to construct the specific equine disease-free zone of of the Guangzhou Asian Games, to ensure that the equestrian events of Guangzhou Asian Games be smoothly held. [Methods] The species, quantities, distribution and seasonal variations of insects and wild animals in related zones were investigated from 2008 to 2010, and the collected samples of the insects and wild animals were tested in laboratory for related equine diseases. [Results] The investigations indicated that there were some mosquitoes, flies, horseflies, punkies, ticks, bats, wild birds and wild bears in equastrianism venue and peripheral regions of disease-free zone of the Guangzhou Asian Games, the laboratory results of Japa- nese encephalitis, vesicular stomatitis, Nipah virus disease, West Nile fever, and Trypanosomiasis evansi, were all negative. According to the in- vestigations and test results, the risk assessments of insect and wild animal vectors in the prevalence of related equine diseases were made to con- firm that the risk was relatively low or very low, and comprehensive prevention and control measures with prevention as major measures and insecti- cides application and environment managements as supplementary means were made on the basis of the risk assessment conclusions. [ Conclu- sions] This research has laid a solid foundation for the successful building of the first specific equine disease-free zone in our country, ensured the smooth holding of the 16th equastdan competition in Guangzhou Asian Games.
文摘Pigeonpea [Cajanus cajan (L.) Millspaugh] is an important food legume of the semi-arid tropics (SAT) sustaining livelihood of millions of people. Stagnant and unstable yield per hectare all over the world is the characteristic feature of this crop. This is primarily ascribed to its susceptibility/sensitivity to a number of biotic and abiotic factors. Among biotic factors, insects such as pod borer (Helicoverpa armigera), pod fly (Melanoagromyza obtusa) and spotted borer (Maruca vitrata) substantially damage the crop and result in significant economic losses. Management of these insects by genetic means has always been considered environment friendly approach. However, genetic improvement has always been impeded by limited genetic variability in the primary gene pool of pigeonpea. Wild species present in the secondary and tertiary gene pools have been reported to carry resistance for such insects. However, transfer of resistance through conventional backcrossing has not been much successful. It calls for gene introgression through marker assisted backcrossing (MABC) or advanced backcross breeding (AB breeding). In this review, we have attempted to assess the progress made through conventional and molecular breeding and suggested the ways to move further towards genetic enhancement for insects resistance in
文摘云南省是我国大蚕蛾科(Saturniidae)绢丝昆虫资源最为丰富的地区之一。利用DNA条形码技术对采自云南省楚雄地区的一种野生绢丝昆虫进行分子鉴定,并调查其茧质性状。提取该野生绢丝昆虫的蛹基因组DNA,以昆虫线粒体细胞色素C氧化酶亚基Ⅰ基因(mt DNA COⅠ)片段通用引物PCR扩增,获得一段长度为574 bp的mt DNA COⅠ基因片段(Gen Bank登录号:KR812471)。基于mt DNA COⅠ基因序列比对,该野生绢丝昆虫与柞蚕属(Antheraea)的明目大蚕蛾(A.frithi)同源序列的相似度为99.47%。应用Kimura-2-Parameter模型计算该野生绢丝昆虫与2种明目大蚕蛾及其他19种柞蚕属绢丝昆虫的遗传距离,结果显示其与明目大蚕蛾的遗传距离仅为0.005;构建的进化树中,该野生绢丝昆虫也是最先与明目大蚕蛾聚在一起。此外,该野生绢丝昆虫的成虫形态特征与已有文献描述明目大蚕蛾的特征相符。综合分子鉴定结果与成虫的形态特征,确认该野生绢丝昆虫为明目大蚕蛾(Antheraea frithi)。供试明目大蚕蛾所生产的茧为黄褐色,有茧柄,无茧孔,平均茧大小为20 mm×38 mm,平均单粒茧质量6.55 g,平均茧层率10.8%,初步认为具有潜在的开发利用价值。
