ソルガム新品種「SUX109-1（夏太郎）」の栽培特性に関する研究 : 播種期および栽植密度の違いが生育・収量に及ぼす影響

本研究室では，高消化性遺伝子と紫斑点病抵抗性遺伝子を併せ持つソルガム新品種「SUX109-1（夏太郎）」 を育成した。この「SUX109-1」の栽培特性を把握するため，「SUX109-1」と市販の3品種を比較品種として，播種期と栽植密度の違いが生育・収量に及ぼす影響を検討した。その結果，播種期に関する試験では， 「SUX109-1」は標準播種期で最も多収であり，晩播による出穂迄日数，稈長および稈径の低下がその要因と考えられた。一方，栽植密度に関する試験では，「SUX109-1」は比較の「高糖分ソルゴー」および「ハイグレインソルゴー」の2品種に比べ，密植に適しており，葉身が立っているといった草型が関係していると推察された。Article信州大学農学部AFC報告 13: 29-33 (2015)departmental bulletin pape

Utility of bronchoscopically obtained frozen cytology pellets for next-generation sequencing

Background: Next-generation sequencing (NGS) is essential for lung cancer treatment. It is important to collect sufficient tissue specimens, but sometimes we cannot obtain large enough samples for NGS analysis. We investigated the yield of NGS analysis by frozen cytology pellets using an Oncomine Comprehensive Assay or Oncomine Precision Assay. Methods: We retrospectively enrolled patients with lung cancer who underwent bronchoscopy at Kobe University Hospital and were enrolled in the Lung Cancer Genomic Screening Project for Individualized Medicine. We investigated the amount of extracted DNA and RNA and determined the NGS success rates. We also compared the amount of DNA and RNA by bronchoscopy methods. To create the frozen cytology pellets, we first effectively collected the cells and then quickly centrifuged and cryopreserved them. Results: A total of 132 patients were enrolled in this study between May 2016 and December 2022; of them, 75 were subjected to frozen cytology pellet examinations and 57 were subjected to frozen tissue examinations. The amount of DNA and RNA obtained by frozen cytology pellets was nearly equivalent to frozen tissues. Frozen cytology pellets collected by endobronchial ultrasound-guided transbronchial needle aspiration yielded significantly more DNA than those collected by transbronchial biopsy methods. (P < 0.01) In RNA content, cytology pellets were not inferior to frozen tissue. The success rate of NGS analysis with frozen cytology pellet specimens was comparable to the success rate of NGS analysis with frozen tissue specimens. Conclusions: Our study showed that frozen cytology pellets may have equivalent diagnostic value to frozen tissue for NGS analyses. Bronchial cytology specimens are usually used only for cytology, but NGS analysis is possible if enough cells are collected to create pellet specimens. In particular, the frozen cytology pellets obtained by endobronchial ultrasound-guided transbronchial needle aspiration yielded sufficient amounts of DNA. Trial registration: This was registered with the University Medical Hospital Information Network in Japan (UMINCTR registration no. UMIN000052050)