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Articles by Nison Sattayasai
Total Records ( 3 ) for Nison Sattayasai
  Arunrat Chaveerach , Nattapong Srisamoot , Suporn Nuchadomrong , Nison Sattayasai , Prapansak Chaveerach , Alongkoad Tanomtong and Krit Pinthong
  The genetic relationship of 20 Carnivora species in Thailand was determined based on sequence analysis of the Internal Transcribed Spacer (ITS) region of ribosomal DNA. Aligned sequences of the complete ITS region obtained from the 20 taxa and two primate outgroups resulted in 890 characters with 710 variable sites. Genetic distances and a phylogenetic tree were constructed from comparisons of ITS sequences using the Neighborjoining method. The dendogram demonstrates that the 22 taxa can be clearly grouped in six clusters: Mustelidae, Ursidae, Canidae, Felidae, Viveridae and Hylobatidae. Of these clusters, the 20 Canivora species are clustered together and the superfamilies Caniformia and Feliformia can be separated apart, whereas the outgroup Hylobatidae is segregated from the canivora. In superfamilies Caniformia, the families Mustelidae, Ursidae and Canidae are clustered together. In superfamilies Feliformia, the family Felidae is clustered with Viverridae. The phylogenetic tree of Viverridae species does not completely match the classification based on morphological characters. The Paradoxurinae, Arctictis binturong was grouped into the Viverrinae while the other Paradoxurinae, Paradoxurus hermaphroditus, Paguma larvata and Arctogalidia trivirgata are clustered together.
  Tawatchai Tanee , Arunrat Chaveerach , Nison Sattayasai , Alongkoad Tanomtong , Scott A. Suarez and Suporn Nuchadomrong
  Cytogenetic studies of three gibbon species using conventional banding patterns were investigated showing an identical number of 44 diploid chromosomes. They are assumed to have common evolutionary relationships. For in depth study, molecular markers were assessed using the Amplified Fragment Length Polymorphism (AFLP) method. With seven successful primer combinations, a total of 1669 scorable bands were generated. The resulting bands were used for dendrogram construction. From the dendrogram, the individuals of Hylobates lar are closely related to H. agilis more than H. pileatus with a bootstrap value of 78%. Averages of inter-specific genetic similarity values among all gibbon species studied are 67.15% (between H. lar and H. pileatus) to 71.03% (between H. lar and H. agilis). In summary three gibbon species show genetic stability within a species. The development of specific molecular markers of a species is beneficial for genetic differentiation of this group of primates.
  Arunrat Chaveerach , Tawatchai Tanee , Nison Sattayasai , Alongkoad Tanomtong , Scott A. Suareze and Suporn Nuchadomrong
  Cytogenetic studies of five langur species using conventional banding pattern were investigated. All species studied have an identical number of 44 diploid chromosomes, they are assumed to have common evolutionary relationships. For in depth study, molecular markers were assessed using the Amplified Fragment Length Polymorphism (AFLP) method. With seven successful primer combinations, a total of 1043 scorable bands were generated. The percentage of polymorphic bands for each primer ranged from 48.60 to 94.12%. The resulting bands were used for dendrogram construction. From the dendrogram, the individuals of Trachypithecus species are grouped into two major clusters, T. phayrei is clustered with T. obscurus, while T. cristatus is clustered with T. francoisi. The bootstrap value between two groups is 94%. The other cluster, Presbytis femoralis is separated from the Trachypithecus species with a bootstrap value of 94%. Averages of inter-specific genetic similarity values among all langur species studied are 70.16% (between T. obscurus and P. femoralis) to 88.12% (between T. phayrei and T. obscurus). In summary T. phayrei might be a subspecies of T. obscurus. The development of specific molecular markers of a species is beneficial for genetic differentiation of this group of primates.
 
 
 
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