26种不同的玉米基因组的新组合,注释和比较分析
Matthew B Hufford1, Arun S Seetharam1,2, Margaret R Woodhouse3
1Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA 50011, USA.
Science (New York, N.Y.)
|August 6, 2021
概括
研究人员为26个玉米杂交系产生了新的基因组数据,揭示了超过103,000个玉米泛基因以及对基因组进化和DNA甲基化的见解. 这项工作增强了定量特征测绘能力.
科学领域:
- 植物基因组学
- 玉米遗传学
- 人口基因组学
背景情况:
- 对于遗传学研究来说,玉米嵌套协会映射 (NAM) 种群至关重要.
- 了解创始人系内的遗传多样性对于发现特征至关重要.
研究的目的:
- 为26个玉米NAM种群的创始人提供全面的基因组资源.
- 描述这些多样化的基因组结构,基因含量和表观遗传变异.
- 评估结构变异和甲基化对表型变异和定量特征映射的影响.
主要方法:
- 新的基因组组装
- 转录组测序
- 基因组注释
- 甲基组测序
- 比较基因组学
主要成果:
- 创建了26个不同的玉米杂交系的高质量基因组组合和注释.
- 识别了超过103,000个基因的泛基因组,基因型之间存在显著的差异.
- 揭示了玉米古老四体过去的持续基因组分离以及中位素的详细变化.
- 证明将结构变异与单核酸多态 (SNP) 结合起来可以增强定量特征映射.
- 记录了DNA甲基化变异,确定了对影响表型变化的cis-regulatory元素丰富的非甲基化区域.
结论:
- 基因组资源将加速玉米的遗传研究和育种.
- 玉米基因组的进化特点是持续的分离和实质性的结构变化.
- DNA甲基化模式是玉米表型变异和调控复杂性的来源.
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