雌雄同体自由生活线虫的基因组组装

Genome Assembly of , a Trioecious Free-Living Nematode.

作者信息

Tandonnet Sophie, Haq Maairah, Turner Anisa, Grana Theresa, Paganopoulou Panagiota, Adams Sally, Dhawan Sandhya, Kanzaki Natsumi, Nuez Isabelle, Félix Marie-Anne, Pires-daSilva André

机构信息

School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK.

Department of Biological Sciences, University of Mary Washington, Fredericksburg, VA 22401 UK.

出版信息

J Nematol. 2023 Feb 7;54(1):20220059. doi: 10.2478/jofnem-2022-0059. eCollection 2022 Feb.

DOI:10.2478/jofnem-2022-0059

PMID:36879950

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9984802/

Abstract

Nematodes of the genus are interesting models for studying sex determination mechanisms because their populations consist of three sexual morphs (males, females, and hermaphrodites) and produce skewed sex ratios. Here, we introduce a new undescribed species of this genus, n. sp., together with its draft nuclear genome. This species is also trioecious and does not cross with the other described species or . Similar to , ' maternal environment influences the hermaphrodite versus female sex determination of the offspring. The genome of is ~60 Mb, containing 11,040 protein-coding genes and 8.07% of repeat sequences. Using the estimated ancestral chromosomal gene content (Nigon elements), it was possible to identify putative X chromosome scaffolds.

摘要

属的线虫是研究性别决定机制的有趣模型，因为它们的种群由三种性形态（雄性、雌性和雌雄同体）组成，并且产生偏态的性别比例。在这里，我们介绍了该属一个未描述的新物种，新种，以及它的核基因组草图。该物种也是雌雄同株的，并且不与其他已描述的物种或杂交。与一样，“母体环境影响后代雌雄同体与雌性的性别决定。的基因组约为60 Mb，包含11,040个蛋白质编码基因和8.07%的重复序列。利用估计的祖先染色体基因含量（Nigon元件），有可能鉴定出假定的X染色体支架。