Project description:The complete mitochondrial genome of Chionoecetes opilio is a 16,067 bp long, circular molecule which contains 13 protein-coding genes (PCGs), 22 transfer RNA genes (tRNAs), and 2 ribosomal RNA genes (rRNAs). Its gene contents and organization are generally similar to other majoid mitogenomes. However, the mitogenome shows unique characteristics; long terminal amino acids, loss or addition of 3 PCGs, a 1216 bp long putative D-loop region, and peculiar secondary structures of 5 tRNAs. The concatenated amino acid sequences of 13 PCGs were used to analyze the phylogenetic tree, which well supported the monophyly of brachyuran clades of Majoidea, Heterotremata, Thoracotremata, and Eubrachyura.
Project description:Rice tungro bacilliform virus (RTBV) is determinant of the rice tungro disease symptom. We compare the gene responses by RTBV infection between RTBV susceptive (TN1) and resistant cultivar (TW16). TN1 infected with RTBV shows the mild stunting and leaf yellowing, although TW16 shows only mild stunting at only early infection stage, and recovers the symptoms. Keywords: virus infection, disease response
Project description:The snow crab (Chioneocetes opilio) fishery in the Barents Sea is carried out by large offshore vessels, as the fishing grounds are located far from shore and the gear must be transported back and forth over long distances. Therefore, fishers use stackable conical pots that allow large numbers of pots to be carried on deck for each trip. One of the drawbacks of using stackable pots is that the entrance is at the vertex of the conical pot, which fishers claim does not provide the desired fishing efficiency. Thus, the goal of this study was to determine whether a different pot design would improve the catch efficiency of snow crabs. We investigated the efficiency of a new type of pot called the moon pot, which provides continuous increased bait odour intensity as snow crabs make their way towards the entrance of the pot. This alteration was expected to increase catch efficiency compared to that of the conical pots used by the fleet today. However, experimental fishing results showed that the modified pots had significantly lower catch efficiency than the standard conical pots, as only ~66% of the number of crabs caught by the conical pots were caught in the moon pots. The main reason for this reduced catch efficiency likely was the initial steepness of the moon pot, which may have made it difficult for crabs to reach the pot entrance. These results demonstrated that pot design can dramatically affect catch efficiency of snow crabs.
Project description:Rice tungro disease is caused by the interaction between Rice tungro spherical virus (RTSV) and Rice tungro bacilliform virus. Infection with RTSV alone does not result in any distinctive symptoms in TW16 that is one of RTSV resistant indica rice. To elucidate the basis of asymptomatic response of rice to RTSV at the gene expression level, global gene response in RTSV-infected TN1 was detected by custom microarray. Keywords: time course, virus infection, disease response
Project description:Rice tungro bacilliform virus (RTBV) is determinant of the rice tungro disease symptom. We compare the gene responses by RTBV infection between RTBV susceptive (TN1) and resistant cultivar (TW16). TN1 infected with RTBV shows the mild stunting and leaf yellowing, although TW16 shows only mild stunting at only early infection stage, and recovers the symptoms. Keywords: virus infection, disease response Comparison between RTBV and mock infected rice. Biological replicates: 3 control, 3 infected, independently grown and harvested. 1 samples derived from 5 plants grown under same conditons
