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发现和进化分析一种具有长端重复的内源性帕拉雷特病毒的新品种

Dongying Gao¹, Lydia G Tressel²

¹Small Grains and Potato Germplasm Research Unit, USDA-ARS, Aberdeen, ID 83210, USA.

Genome biology and evolution

|December 4, 2025

概括

在大麦中发现了一种具有长期终端重复 (LTR) 的新型内源性帕拉雷特病毒 (EPRV),称为Hvu-EPRV. 这一发现揭示了EPRV在草中的古代入侵和演变,揭示了一个新的属,Idahovirus.

科学领域:

遗传学是一个遗传学.
病毒学病毒学
植物生物学植物生物学

背景情况:

内源性帕雷特病毒 (EPRV) 在植物中很常见,但在大麦等谷物中表征不佳.
了解EPRV的多样性和进化对于植物基因组学至关重要.

研究的目的:

在大麦基因组中识别和表征新型EPRV.
研究EPRVs在草家族中的进化史和分布.

主要方法:

对大麦参考基因组的生物信息分析.
鉴定和描述Hvu-EPRV,一种带有LTRs的新型EPRV.
跨多种植物物种的比较基因组学,专注于草.
遗传学分析以确定进化关系.
在大麦基因组中对整合事件的分析.

主要成果:

在大麦中发现Hvu-EPRV,其特点是与LTR逆转移子相似的LTRs.
在六个部落的17种草种中发现了含有LTR的同类序列.
古代入侵的证据和Hvu-EPRV元素在草中的潜在水平转移.
遗传学分析确定了Hvu-EPRV及其同类物为Caulimoviridae家族中的新属Idahovirus.
在大麦基因组中发现了三种Hvu-EPRV最近独立的融合事件,这些事件发生在大麦基因组与其原始基因分离后.

结论:

这项研究确定了第一个具有LTR的EPRV,并揭示了它们最近在大麦中的融合事件.
这些发现为植物EPRV的进化及其在草中古代入侵历史提供了新的见解.
将草 EPRV 分类为新型 Idahovirus 属,扩大了我们对植物逆转录病毒多样性的理解.

关键词:

大麦大麦大麦大麦大麦大麦大麦大麦内源性帕拉雷特病毒草家族的家庭草.长终端重复重复.一个泛基因组.

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