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Optimization of breeding methods when introducing multiple resistance genes from American to Chinese wheat

机译:向中国小麦引入多个抗性基因的育种方法优化

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Stripe rust is one of the most destructive diseases of wheat worldwide. Growing resistant cultivars with resistance genes is the most effective method to control this disease. QuLine is a computer tool capable of defining genetic models, breeding strategies and predicting parental selection using known gene information. This paper reports the breeding process for pyramiding resistance genes to stripe rust using genetic information of American cultivars Aplowa (P1), Louise (P2), Express (P3) and Chinese cultivar Zhoumai18 (P4). The breeding objective was to transfer the stripe rust (SR) resistance genes from the three American lines to the elite Chinese wheat, without reducing its desired agronomic performance (AT). Results show that double crosses (P4×P1)//(P4×P2), (P4×P1)//(P4×P3) and (P4×P2)//(P4×P3) were efficient in improving genetic gains on traits AT and SR in selection strategy AHA, while only in HAH, cross combination (P4×P3) // (P1×P2) had the highest genetic gains on high-temperature, adult-plant resistance (HTAP). The results in this study could be important in targeted breeding for efficiently pyramiding more resistance genes to stripe rust, avoiding simplified resistance genes, and breeding novel varieties.
机译:条锈是全世界小麦最具破坏性的疾病之一。用抗性基因培育抗性品种是控制这种疾病的最有效方法。 QuLine是一种计算机工具,能够使用已知的基因信息来定义遗传模型,育种策略并预测父母的选择。本文利用美国品种Aplowa(P1),Louise(P2),Express(P3)和中国品种Zhoumai18(P4)的遗传信息,报道了金字塔抗性基因对条锈病的育种过程。育种目标是将抗条锈病(SR)基因从三个美国品系转移到中国优良小麦上,而不降低其所需的农艺性能(AT)。结果表明,双杂交(P4×P1)//(P4×P2),(P4×P1)//(P4×P3)和(P4×P2)//(P4×P3)可以有效提高玉米的遗传增益。选择策略AHA中,AT和SR的性状,而仅在HAH中,交叉组合(P4×P3)//(P1×P2)在高温,成株抗性(HTAP)上具有最高的遗传增益。这项研究的结果对于有效地将更多的抗性基因传到铁锈上,避免简化的抗性基因,以及育种新品种,对于有针对性的育种可能是重要的。

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