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一项模拟研究,将高级标记器辅助选择与树木育种计划中的基因组选择进行比较.

Bernd Degen1, Niels A Müller1

  • 1Thünen Institute of Forest Genetics, Sieker Landstrasse 2, 22927, Grosshansdorf, Schleswig-Holstein, Germany.

G3 (Bethesda, Md.)
|July 26, 2023
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概括
此摘要是机器生成的。

基因组选择 (GS) 在树木繁殖模拟中通常优于标记器辅助选择 (MAS),特别是在复杂的特征中. 虽然MAS在降低测序成本方面表现有前途,但GS为遗传收益和管理内生繁殖提供了一个强大的战略.

关键词:
在GWAS中,GWAS就是GWAS.植物遗传学和基因组学在SNPscan育种器上,SNP可以培育种子.gBLUP gBLUP 是一个遗传上的收益 遗传上的收益 遗传上的收益基因组选择 基因组选择用标记器辅助的选择.随机模拟 随机模拟 随机模拟

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科学领域:

  • 基因组学就是基因组学.
  • 量化遗传学 量化遗传学
  • 林业 林业 林业 林业 林业

背景情况:

  • 在DNA测序方面的进步使复杂特征的全基因组关联研究 (GWAS) 成为可能.
  • 使用已识别的SNP进行标记器辅助选择 (MAS) 和基因组选择 (GS) 是繁殖计划的潜在工具.
  • 树木育种策略是漫长的,使得高效的选择方法至关重要.

研究的目的:

  • 在模拟的树木育种计划中,比较MAS与GS的有效性.
  • 评估不同遗传架构和亲属关系水平对选择方法的影响.
  • 评估种群大小和表型选择对GWAS性能的影响.

主要方法:

  • 使用"SNPscan育种器"软件模拟树木育种程序.
  • 根据不同的选择标准 (MAS,GS,后代测试) 的遗传收益和内生育的比较.
  • 对GWAS和GS的不同遗传架构,亲属关系水平和人口规模的评估.

主要成果:

  • 使用gBLUP的基因组选择 (GS) 在大多数模拟场景中通常表现最好.
  • 基于GWAS的标记器辅助选择 (MAS) 仅在估计在大型,无关群体中的等位基效应时,才超过GS.
  • 使用3,000种极端表型的GWAS与使用10,000种表型一样有效.
  • 与后代测试和基于GWAS的选择相比,GS导致了更高的近亲繁殖和减少的遗传多样性.

结论:

  • 基因组选择显示出森林树木繁殖和改进的巨大潜力.
  • 随着测序成本的降低,标记器辅助选择可能变得更加相关.
  • 选择选择策略取决于人口结构,遗传结构和可用的数据.