田间豆的实际种群规模
Josephine Princy Johnson1, Lisa Piche1, Hannah Worral1
1Department of Plant Sciences, North Dakota State University, Fargo, ND, 58108-6050, USA.
BMC genomics
|July 15, 2024
概括
在豆中有效种群大小 (Ne) 估计显示,与多样性面板相比,现代繁殖系中的Ne较低. 这凸显了育种者需要监测遗传多样性的必要性,以维持长期的育种努力.
科学领域:
- 人口遗传学 人口遗传学
- 植物育种 植物育种
- 基因组多样性 基因组多样性
背景情况:
- 有效种群大小 (Ne) 对于了解内生繁殖率和繁殖种群中的遗传多样性至关重要.
- 较小的Ne会导致更快的近亲繁殖,并限制遗传收益,影响选择的有效性.
- 监测Ne在植物育种中越来越重要,以管理遗传变异性.
研究的目的:
- 根据豆基因组中的链接不平衡 (LD) 提供有效种群大小 (Ne) 的首次估计.
- 为了比较现代繁殖线和多样性小组之间的Ne.
主要方法:
- 使用单核酸多态 (SNP) 标记物的Ne的计算和比较.
- 对链接不平衡 (LD) 的程度和模式的分析.
- 北达科他州立大学 (NDSU) 的现代育种线和美国农业部 (USDA) 的多样性小组之间的比较.
主要成果:
- 连接不平衡 (LD) 的程度在豆基因组中差异很大.
- 与美国农业部小组 (平均r2=0.34) 相比,NDSU线路表现出更高和更长范围的LD (平均r2=0.57).
- 估计的Ne几乎是USDA小组 (Ne = 174) 的三倍高于NDSU线 (Ne = 64),可能受人口结构的影响.
结论:
- 这项研究提供了对被研究的豆生殖质的遗传多样性的见解.
- 结果指导植物育种者在整个育种周期中积极监测Ne.
- 维持长期的繁殖生存能力需要仔细管理有效种群规模.
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