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基因组方法可以加速美国栗子的恢复
Jared W Westbrook1, Joanna Malukiewicz2,3, Qian Zhang2
1The American Chestnut Foundation, Asheville, NC, USA.
概括
中国栗子的内进有助于美国栗子从灾难中恢复. 有70-85%美国血统的杂交的选择性繁殖可以显著提高疾病抵抗力以恢复.
科学领域:
- 植物遗传学 植物遗传学
- 森林病理学 森林病理学
- 保护生物学 保护生物学
背景情况:
- 一个多世纪前,引入的病原体摧毁了美国栗子种群.
- 中国栗子的侵入性提供了一条恢复美国栗子害虫耐药性的途径.
- 复杂的抗性遗传结构减缓了繁殖的进展.
研究的目的:
- 阐明中国和美国栗子物种中抗灾性病菌的遗传和代谢基础.
- 通过大规模的混合种群的表型和基因型识别来加速耐药性繁殖.
- 为制定发展弹性美国栗子恢复种群的战略提供信息.
主要方法:
- 参考基因组,基因表达和干代谢物概况的比较分析.
- 美国和中国栗子杂交物种的大规模表型和基因型鉴定.
- 模拟和接种实验,以评估耐药性增长.
主要成果:
- 确定了对抗病的关键遗传和代谢差异.
- 在具有特定美国栗子祖先的杂交品种中,可以实现显著的耐药性增长.
- 为未来的育种工作开发了基础资源.
结论:
- 选择性繁殖的混合物与70-85%的美国栗子血统是一种可行的策略,以提高耐火性.
- 这项研究为繁殖多样化,抗病的美国栗子种群提供了必不可少的工具和见解.
- 这些发现支持美国栗子森林的长期恢复和恢复.
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