Resequencing of 301 ramie accessions identifies genetic loci and breeding selection for fibre yield traits.

Ramie is an important fibre-producing crop in China; however, the genetic basis of its agronomic traits remains poorly understood. We produced a comprehensive map of genomic variation in ramie based on resequencing of 301 landraces and cultivars. Genetic analysis produced 129 signals significantly associated with six fibre yield-related traits, and several genes were identified as candidate genes for respective traits.

Genomic analyses provide comprehensive insights into the domestication of bast fiber crop ramie (Boehmeria nivea).

Ramie (Boehmeria nivea) is an economically important natural fiber-producing crop that has been cultivated for thousands of years in China; however, the evolution of this crop remains largely unknown. Here, we report a ramie domestication analysis based on genome assembly and resequencing of cultivated and wild accessions. Two chromosome-level genomes representing wild and cultivated ramie were assembled de novo.

Linkage mapping of quantitative trait loci for fiber yield and its related traits in the population derived from cultivated ramie and wild B. nivea var. tenacissima.

Ramie is an important natural fiber crop, and the fiber yield and its related traits are the most valuable traits in ramie production. However, the genetic basis for these traits is still poorly understood, which has dramatically hindered the breeding of high yield in this fiber crop. Herein, a high-density genetic map with 6,433 markers spanning 2476.

A genomic resource derived from the integration of genome sequences, expressed transcripts and genetic markers in ramie.

Background: The redundancy of genomic resources, including transcript and molecular markers, and their uncertain position in the genome have dramatically hindered the study of traits in ramie, an important natural fiber crop.

Results: We obtained a high-quality transcriptome consisting of 30,591 non-redundant transcripts using single-molecule long-read sequencing and proposed it as a universal ramie transcriptome. Additionally, 55,882 single nucleotide polymorphisms (SNPs) were identified and a high-density genetic map was developed.

A Comparative Analysis of the Venom Gland Transcriptomes of the Fishing Spiders Dolomedes mizhoanus and Dolomedes sulfurous.

Dolomedes sulfurous and Dolomedes mizhoanus are predaceous arthropods catching and feeding on small fish. They live in the same area and have similar habits. Their venoms exhibit some similarities and differences in biochemical and electrophysiological properties.

A survey of the venom of the spider Lycosa vittata by biochemical, pharmacological and transcriptomic analyses.

Lycosa vittata, mainly distributed in the southwest of China, is a medium-sized and venomous spider, whose venom remains unexplored so far. This study aims to present an overview of the venom. It mainly consisted of diverse peptides and exhibited inhibitory effects on voltage-gated ion channels in rat dorsal root ganglia neurons, with a strongest inhibition on tetrodotoxin-sensitive and tetrodotoxin-resistant voltage-gated Na(+) channels.

A comparative study of the molecular composition and electrophysiological activity of the venoms from two fishing spiders Dolomedes mizhoanus and Dolomedes sulfurous.

Dolomedes mizhoanus and Dolomedes sulfurous are two venomous spiders found in the same area in southern China and are characterized by living in water plants and feeding on fish. In this study, the chemical compositions and activities of these venoms were compared. Both venoms contain hundreds of peptides as shown by off-line RP-HPLC/MALDI-TOF-MS analysis, but have a different peptide distribution, with D.

Beneficial effects of trypsin inhibitors derived from a spider venom peptide in L-arginine-induced severe acute pancreatitis in mice.

HWTI is a 55-residue protein isolated from the venom of the spider Ornithoctonus huwena. It is a potent trypsin inhibitor and a moderate voltage-gated potassium channel blocker. Here, we designed and expressed two HWTI mutants, HWTI-mut1 and HWTI-mut2, in which the potassium channel inhibitory activity was reduced while the trypsin inhibitory activity of the wild type form (approximately 5 EPU/mg) was retained.

The venom of the fishing spider Dolomedes sulfurous contains various neurotoxins acting on voltage-activated ion channels in rat dorsal root ganglion neurons.

Dolomedes sulfurous is a venomous spider distributed in the south of China and characterized with feeding on fish. The venom exhibits great diversity and contains hundreds of peptides as revealed by off-line RP-HPLC/MALDI-TOF-MS analysis. The venom peptides followed a triple-modal distribution, with 40.