金字塔式小麦在收割前发芽的抗性基因在三角种繁殖中
Odile Moullet1, Gemma Díaz Bermúdez1, Dario Fossati1
1Plant Breeding and Genetic Resources, Agroscope Changins, CH-1260 Nyon, Switzerland.
Molecular breeding : new strategies in plant improvement
|June 13, 2023
概括
现在,由于引入小麦基因,triticale已经改善了预收割发芽 (PHS) 抵抗力. 基因TaPHS1有效地增强了PHS耐药性,而不影响其他重要的triticale特征.
科学领域:
- 植物育种 植物育种
- 遗传学 是一个遗传学.
- 农业学是一种农业学.
背景情况:
- 收获前发芽 (PHS) 显著降低谷物产量和质量.
- 特里蒂卡尔对PHS具有很高的易感性,该物种内没有发现的抗性基因.
- 小麦与三树共享基因组,是PHS耐药性侵入的来源.
研究的目的:
- 为了从小麦中引入前收割发芽 (PHS) 耐药基因进入三.
- 开发耐PHS的三种类,保持农业性能.
- 为了评估小麦特异性PHS耐药基因在三中有效性的效果.
主要方法:
- 用标记器辅助的跨物种交叉被用来将小麦基因转移到triticale.
- 进行了四次逆向交叉,将基因整合到triticale基因组中.
- 在开发的线条中评估了农学和抗病特征.
主要成果:
- 小麦基因TaPHS1成功地被引入并持续增强了三基的PHS耐药性.
- 基因TaMKK3和TaQsd1的有效性有限,可能是由于标记物-基因链接问题.
- 内进的PHS耐药基因并没有对triticale的农学特征或疾病耐药性产生负面影响.
结论:
- 小麦PHS抗性基因可以有效地转移到triticale,增强作物弹性.
- TaPHS1 是一个关键的基因,用于改善三树的PHS耐药性.
- 这一策略已经产生了两种新的农业学上健全的和耐PHS的三角品种,即将注册.
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