Dissecting weed adaptation: Fitness and trait correlations in herbicide-resistant Alopecurus myosuroides.
Dissecting weed adaptation: Fitness and trait correlations in herbicide-resistant Alopecurus myosuroides.
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解剖杂草适应：抗除草剂大穗看麦娘的适合度和性状相关性。
DOI：
10.1002/ps.6930
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发表时间：
2022-07
影响因子：
4.1
通讯作者：
Neve, Paul
中科院分区：
文献类型：
--
作者：
Comont, David;MacGregor, Dana R.;Crook, Laura;Hull, Richard;Nguyen, Lieselot;Freckleton, Robert P.;Childs, Dylan Z.;Neve, Paul
揭示杂草种群中非靶点抗性（NTSR）性状的遗传结构可以为与这些性状相关的遗传、权衡和适应性成本问题提供信息。经典的数量遗传学方法允许研究多基因性状的遗传结构，即使在适应的遗传基础仍然未知的情况下。这些方法有可能克服以前研究NTSR遗传学和适应性的一些局限性。通过对来自9个田间采集群体的400个大穗看麦娘家系进行定量遗传分析，我们发现对乙酰乳酸合成酶和乙酰辅酶A羧化酶抑制剂的抗性具有很强的遗传力（h 2分别为0.731和0.938），以及对这两种不同除草剂作用模式的抗性具有共同的加性遗传方差的证据，rg = 0.34（存活率），0.38（生物量）。我们没有发现生活史性状和除草剂抗性之间遗传相关性的证据，表明对这两种作用模式的抗性与黑草的大健康成本无关。然而，我们证明，植物开花特性的表型变异是可遗传的，h 2 = 0.213（花高），0.529（花头数），0.449（开花时间）和0.372（种子脱落时间），表现出适应其他非化学管理措施（如割草的开花头）的潜力，现在被通过黑种草控制。这些结果强调，数量遗传学可以提供重要的洞察NTSR的遗传和遗传结构，并可以与新兴的分子技术一起使用，以更好地了解除草剂抗性的进化和适应性景观。版权所有© 2022作者。由John Wiley & Sons有限公司代表化学工业协会出版的《害虫管理科学》。数量遗传学揭示了开花性状的遗传力和对乙酰乳酸合成酶和乙酰辅酶A羧化酶抑制剂的抗性的共享加性遗传方差，但没有证据表明与这些抗性相关的大的适应性成本。
Unravelling the genetic architecture of non‐target‐site resistance (NTSR) traits in weed populations can inform questions about the inheritance, trade‐offs and fitness costs associated with these traits. Classical quantitative genetics approaches allow study of the genetic architecture of polygenic traits even where the genetic basis of adaptation remains unknown. These approaches have the potential to overcome some of the limitations of previous studies into the genetics and fitness of NTSR. Using a quantitative genetic analysis of 400 pedigreed Alopecurus myosuroides seed families from nine field‐collected populations, we found strong heritability for resistance to the acetolactate synthase and acetyl CoA carboxylase inhibitors (h 2 = 0.731 and 0.938, respectively), and evidence for shared additive genetic variance for resistance to these two different herbicide modes of action, r g = 0.34 (survival), 0.38 (biomass). We find no evidence for genetic correlations between life‐history traits and herbicide resistance, indicating that resistance to these two modes of action is not associated with large fitness costs in blackgrass. We do, however, demonstrate that phenotypic variation in plant flowering characteristics is heritable, h 2 = 0.213 (flower height), 0.529 (flower head number), 0.449 (time to flowering) and 0.372 (time to seed shed), demonstrating the potential for adaptation to other nonchemical management practices (e.g. mowing of flowering heads) now being adopted for blackgrass control. These results highlight that quantitative genetics can provide important insight into the inheritance and genetic architecture of NTSR, and can be used alongside emerging molecular techniques to better understand the evolutionary and fitness landscape of herbicide resistance. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. Quantitative genetics reveals the heritability of flowering traits and shared additive‐genetic variance for resistance to the acetolactate synthase and acetyl CoA carboxylase inhibitors, but no evidence for large fitness costs associated with these resistances.
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