Unionidae are an important group of benthic freshwater species. Due to the convergence phenomenon within freshwater mussels, there is still much controversy in the classification of Chinese Unionidae. In China, most s...Unionidae are an important group of benthic freshwater species. Due to the convergence phenomenon within freshwater mussels, there is still much controversy in the classification of Chinese Unionidae. In China, most studies on freshwater mussels emphasized resource investigation, biology and morphology, while little has been done in genetics, and particularly not in population genetic structure as well as genetic diversity. In order to further understand the status of genetic diversity of different species, random amplified polymorphic DNA (RAPD) markers were used to detect genetic diversity of populations in five species of the genus Anodonta: Anodonta arcaeformis, A. arcaeformis flavotincta, A. fluminea, A. woodiana woodiana and A. w.pacifica. DNA extraction method was based on phenol-chloroform and extracted genomic DNA from the adductor muscle and mantle tissues. Sixteen random primers were used for RAPD amplification and the polymorphism of amplified loci were analyzed. The results demonstrated that the percentage of amplified polymorphic loci for various populations ranged from 34.5% to 62.8%, the mean Shannon’s genetic diversity indices ranged from 0.2021 to 0.3552, and the mean intra-population Nei’s genetic distance ranged from 0.1386 to 0.1713. In all populations of the five species, the genetic diversity for A. arcaeformis was the largest, and that of A. fluminea was the lowest. The inter-population genetic distance between A. w. woodiana and A. w. pacifica was 0.3186, so they can be considered as two sister species at the genetic angle.展开更多
In the study,the reasonable sampling of the grey Aneurolepidium chinense of green grassland,the grey-green A.chinense of green grassland,the grey A.chinense of Wulimu and the grey-green A.chinense of Wulimu were analy...In the study,the reasonable sampling of the grey Aneurolepidium chinense of green grassland,the grey-green A.chinense of green grassland,the grey A.chinense of Wulimu and the grey-green A.chinense of Wulimu were analyzed by ISSR.Eight primers with clear and diverse products were screened out from 20 primers and 47 DNA fragments were amplified from 39 individuals.The average number of DNA fragments produced by each primer was 5.9,and polymorphic bands were 41 and the polymorphic rate was 87.23%,which could r...展开更多
A total of 69 random primers were screened by using random amplified polymorphic DNA （RAPD） markers to analyze the genetic bands of 32 Kentucky bluegrass cultivars. A total of 197 bands were amplified from 46 primer...A total of 69 random primers were screened by using random amplified polymorphic DNA （RAPD） markers to analyze the genetic bands of 32 Kentucky bluegrass cultivars. A total of 197 bands were amplified from 46 primers, among which 195 bands were polymorphic. Each primer could amplify one to nine polymorphic bands with an average of 4.3 per primer. Based on similarity coefficient analysis of RAPD results and by using NTSYS software to cluster analyze with the average UPGMA method, the result showed that 18 cultivars of the 32 were in group 1, three cultivars were in group 2, two cultivars were in group 3, eight cultivars were in group 4, and only one cultivar in group 5.展开更多
Total 69 random primers were screened out through RAPD （Random Amplified Polymorphic DNA） markers to analyze the genetic bands of 32 Kentucky bluegrass cultivars. A total of 197 bands were amplified from 46 primers ...Total 69 random primers were screened out through RAPD （Random Amplified Polymorphic DNA） markers to analyze the genetic bands of 32 Kentucky bluegrass cultivars. A total of 197 bands were amplified from 46 primers of them, among which 195 bands were polymorphic. Each primer could amplify one to nine polymorphic bands with an average of 4.3 being amplified from an average of primer. Based on the similarity coefficient analysis of RAPD results, NTSYS software and cluster analysis by using average UPGMA method, the result showed that 18 of 32 cultivars were in group 1, three cultivars were in group 2, two cultivars were in group 3, eight cultivars were in group 4, and there was only one cultivar in group 5, which was C2.展开更多
基金the Special Project Foundation (Grant No.2000050406) of Doctoral Degree , Ministry of Education,andthe Natural Science Foundation(Grant No.99J104) of Hubei Province ,P. R.China
文摘Unionidae are an important group of benthic freshwater species. Due to the convergence phenomenon within freshwater mussels, there is still much controversy in the classification of Chinese Unionidae. In China, most studies on freshwater mussels emphasized resource investigation, biology and morphology, while little has been done in genetics, and particularly not in population genetic structure as well as genetic diversity. In order to further understand the status of genetic diversity of different species, random amplified polymorphic DNA (RAPD) markers were used to detect genetic diversity of populations in five species of the genus Anodonta: Anodonta arcaeformis, A. arcaeformis flavotincta, A. fluminea, A. woodiana woodiana and A. w.pacifica. DNA extraction method was based on phenol-chloroform and extracted genomic DNA from the adductor muscle and mantle tissues. Sixteen random primers were used for RAPD amplification and the polymorphism of amplified loci were analyzed. The results demonstrated that the percentage of amplified polymorphic loci for various populations ranged from 34.5% to 62.8%, the mean Shannon’s genetic diversity indices ranged from 0.2021 to 0.3552, and the mean intra-population Nei’s genetic distance ranged from 0.1386 to 0.1713. In all populations of the five species, the genetic diversity for A. arcaeformis was the largest, and that of A. fluminea was the lowest. The inter-population genetic distance between A. w. woodiana and A. w. pacifica was 0.3186, so they can be considered as two sister species at the genetic angle.
文摘In the study,the reasonable sampling of the grey Aneurolepidium chinense of green grassland,the grey-green A.chinense of green grassland,the grey A.chinense of Wulimu and the grey-green A.chinense of Wulimu were analyzed by ISSR.Eight primers with clear and diverse products were screened out from 20 primers and 47 DNA fragments were amplified from 39 individuals.The average number of DNA fragments produced by each primer was 5.9,and polymorphic bands were 41 and the polymorphic rate was 87.23%,which could r...
基金Supported by the National Natural Science Foundation of China (30871735 31272191)+2 种基金the National Key Technology R&D Program(2006BAD01A19-4-2)the Natural Science Foundation of Heilongjiang Province (C0207 C200619)
文摘A total of 69 random primers were screened by using random amplified polymorphic DNA （RAPD） markers to analyze the genetic bands of 32 Kentucky bluegrass cultivars. A total of 197 bands were amplified from 46 primers, among which 195 bands were polymorphic. Each primer could amplify one to nine polymorphic bands with an average of 4.3 per primer. Based on similarity coefficient analysis of RAPD results and by using NTSYS software to cluster analyze with the average UPGMA method, the result showed that 18 cultivars of the 32 were in group 1, three cultivars were in group 2, two cultivars were in group 3, eight cultivars were in group 4, and only one cultivar in group 5.
基金Supported by National Natural Science Foundation of China (30871735)National Key Technology R&D Program (2006BAD01A19-4-2)+1 种基金Natural Science Foundation of Heilongjiang Province (C0207C200619)
文摘Total 69 random primers were screened out through RAPD （Random Amplified Polymorphic DNA） markers to analyze the genetic bands of 32 Kentucky bluegrass cultivars. A total of 197 bands were amplified from 46 primers of them, among which 195 bands were polymorphic. Each primer could amplify one to nine polymorphic bands with an average of 4.3 being amplified from an average of primer. Based on the similarity coefficient analysis of RAPD results, NTSYS software and cluster analysis by using average UPGMA method, the result showed that 18 of 32 cultivars were in group 1, three cultivars were in group 2, two cultivars were in group 3, eight cultivars were in group 4, and there was only one cultivar in group 5, which was C2.
