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两个Rosa物种的染色体尺度基因组提供了对基因组进化和酸盐积累的洞察力
Dan Zong1, Huan Liu2, Peihua Gan1
1Key Laboratory for Forest Genetic and Tree Improvement and Propagation in Universities of Yunnan Province, Southwest Forestry University, Kunming, 650224, China.
The Plant journal : for cell and molecular biology
|November 15, 2023
概括
对Rosa roxburghii和Rosa sterilis的基因组测序揭示了对维生素C生物合成的洞察力. 确定了关键的基因和进化起源,解释了它们的高 Askorbate 含量.
科学领域:
- 基因组学就是基因组学.
- 植物生物学 植物生物学
- 生物化学 生物化学
背景情况:
- 罗莎·罗克斯堡希和罗莎·斯特里利斯是来自中国的罗莎科植物物种,以高水果 Askorbate (维生素C) 闻名.
- 了解它们的基因组对于探索它们作为维生素C资源的潜力和进化研究至关重要.
研究的目的:
- 为R. roxburghii和R. sterilis.生成高质量的染色体规模的基因组组件.
- 调查高酸盐积累的遗传基础,并探索这些物种的基因组进化.
主要方法:
- 染色体规模的基因组组装和R. sterilis.的哈普洛型分辨率.
- 比较基因组学,基因复制分析和积极选择分析.
- 基因表达分析 (GDP-d-mannose 3',5'-epimerase (GME),GDP-l-galactose phosphorylase (GGP)) 和联合表达网络分析.
主要成果:
- 产生了504 Mb (R. roxburghii) 和981.2 Mb (R. sterilis) 的基因组组合;实现了R. sterilis.的哈普洛型解析组合.
- 确定R. sterilis起源于R. roxburghii和R. longicuspis. 的杂交.
- 在甲酸盐合成中确定了积极选择的基因 (GGP,GalLDH),在水果发育过程中GME和GGP的高表达,以及关键的调节基因 (MYB5,bZIP).
- 观察到烯合成酶基因的扩张,这表明它在类生物合成中的作用.
结论:
- 这项研究为Rosa物种提供了宝贵的基因组资源.
- 确定了高酸盐积累的关键基因和调节网络.
- 阐明了进化见解,包括R. sterilis的杂交起源和导致二次代谢产生的基因重复事件.
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