Investigating the presence of compensatory evolution in dicamba resistant IAA16 mutated kochia (Bassia scoparia)†,Pest Management Science

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Investigating the presence of compensatory evolution in dicamba resistant IAA16 mutated kochia (Bassia scoparia)†
Pest Management Science ( IF 3.8 ) Pub Date : 2020-11-24 , DOI: 10.1002/ps.6198
Chenxi Wu ₁ , Marta Paciorek ₁ , Kang Liu ₁ , Sherry LeClere ₁ , Alejandro Perez-Jones ₁ , Phil Westra ₂ , R Douglas Sammons ₃

Affiliation

Lack of fitness costs has been reported for multiple herbicide resistance traits, but the underlying evolutionary mechanisms are not well understood. Compensatory evolution that ameliorates resistance costs, has been documented in bacteria and insects but rarely studied in weeds. Dicamba resistant IAA16 (G73N) mutated kochia was previously found to have high fecundity in the absence of competition, regardless of significant vegetative growth defects. To understand if costs of dicamba resistance can be compensated through traits promoting reproductive success in kochia, we thoroughly characterized the reproductive growth and development of different G73N kochia biotypes. Flowering phenology, seed production and reproductive allocation were quantified through greenhouse studies, floral (stigma‐anthers distance) and seed morphology, as well as resulting mating and seed dispersal systems were studied through time‐course microcopy images.

中文翻译：

研究麦草畏抗性 IAA16 突变地肤（Bassia scoparia）是否存在补偿进化†

据报道，多种除草剂抗性性状缺乏适应成本，但潜在的进化机制尚不清楚。改善抗性成本的补偿进化已在细菌和昆虫中得到记录，但很少在杂草中进行研究。此前发现，麦草畏抗性 IAA16 (G73N) 突变地肤在没有竞争的情况下具有高繁殖力，尽管存在显着的营养生长缺陷。为了了解麦草畏抗性的成本是否可以通过促进地肤繁殖成功的性状来补偿，我们彻底表征了不同 G73N 地肤生物型的繁殖生长和发育。通过温室研究量化开花物候、种子生产和生殖分配，通过时间进程显微图像研究花（柱头花药距离）和种子形态，以及由此产生的交配和种子传播系统。

更新日期：2020-11-24

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