The impacts of flowering phenology on the reproductive success of the narrow endemic <i>Nouelia insignis</i> Franch. (Asteraceae)

Liu, Fangyan; Gao, Chengjie; Chen, Min; Tang, Gongguo; Sun, Yue‐Hua; Li, Kun

doi:10.1002/ece3.7747

Cited by 10 publications

(4 citation statements)

References 43 publications

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“…We found heritable variation in duration of flowering, a prerequisite for response to selection to occur. In other species, duration of flowering, measured by the duration of stigma receptivity, was linked to higher seed set (Liu et al, 2021). However, the relationship between reproductive success and duration of flowering in our system is less clear.…”

Section: Discussionmentioning

confidence: 99%

Genetic variation in reproductive timing in a long‐lived herbaceous perennial

Reed

Ison

Waananen

et al. 2022

American J of Botany

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Premise: Reproductive fitness of individual plants depends on the timing of flowering, especially in mate-limited populations, such as those in fragmented habitats. When flowering time traits are associated with differential reproductive success, the narrow-sense heritability (h 2 ) of traits will determine how rapidly trait means evolve in response to selection. Heritability of flowering time is documented in many annual plants. However, estimating h 2 of flowering time in perennials presents additional methodological challenges, often including paternity assignment and trait expression over multiple years. Methods: We evaluated the h 2 of onset and duration of flowering using offspring-midparent regressions and restricted maximum likelihood methods in an experimental population of an iterocarpic, perennial, herbaceous plant, Echinacea angustifolia, growing in natural conditions. We assessed the flowering time of the parental cohort in 2005 and 2006; the offspring in 2014 through 2017. We also examined the effects of the paternity assignment from Cervus and MasterBayes on estimates of h 2 . Results: We found substantial h 2 for onset and duration of flowering. We also observed variation in estimates among years. The most reliable estimates for both traits fell in the range of 0.1-0.17. We found evidence of a genotype by year interaction for onset of flowering and strong evidence that genotypes are consistent in their duration of flowering across years. Conclusions: Substantial heritabilities in this population imply the capacity for a response to natural selection, while also suggesting the potential for differential contributions to adaptive evolution among seasons.

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Section: Discussionmentioning

confidence: 99%

Genetic variation in reproductive timing in a long‐lived herbaceous perennial

Reed

Ison

Waananen

et al. 2022

American J of Botany

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“…Its mutation may cause the misexpression of other genes to create different epialleles ( Figure 1 , Table 1 ). The abnormal flowering and dwarfing phenotypes underlying the expression of these epialleles are normally required for reproductive fitness, and these could affect hybridisation events when stably inherited in both immediate and future generations with defective DDM1 alleles [ 31 , 32 ]. Thus, DDM1 acts as a transgenerational epigenetic guardian of the genome modulating the formation of undesirable epialleles potentially affecting genetic diversity.…”

Section: Ddm1 In Trait Regulationmentioning

confidence: 99%

DDM1-Mediated TE Silencing in Plants

Akinmusola

Wilkins

Doughty

2023

Plants

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Epigenetic modifications are indispensable for regulating gene bodies and TE silencing. DECREASE IN DNA METHYLATION 1 (DDM1) is a chromatin remodeller involved in histone modifications and DNA methylation. Apart from maintaining the epigenome, DDM1 also maintains key plant traits such as flowering time and heterosis. The role of DDM1 in epigenetic regulation is best characterised in plants, especially arabidopsis, rice, maize and tomato. The epigenetic changes induced by DDM1 establish the stable inheritance of many plant traits for at least eight generations, yet DDM1 does not methylate protein-coding genes. The DDM1 TE silencing mechanism is distinct and has evolved independently of other silencing pathways. Unlike the RNA-directed DNA Methylation (RdDM) pathway, DDM1 does not depend on siRNAs to enforce the heterochromatic state of TEs. Here, we review DDM1 TE silencing activity in the RdDM and non-RdDM contexts. The DDM1 TE silencing machinery is strongly associated with the histone linker H1 and histone H2A.W. While the linker histone H1 excludes the RdDM factors from methylating the heterochromatin, the histone H2A.W variant prevents TE mobility. The DDM1-H2A.W strategy alone silences nearly all the mobile TEs in the arabidopsis genome. Thus, the DDM1-directed TE silencing essentially preserves heterochromatic features and abolishes mobile threats to genome stability.

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“…It is an endemic and endangered woody remnant species in our country due to the limited distribution and human deforestation. 1–4 Meanwhile, the roots and leaves of Nouelia insignis Franch have been widely applied in traditional Chinese medicine (TCM), and have a long history of use to treat acute icteric hepatitis, chronic hepatitis, bacterial infections, inflammation, etc. 5,6 At present, we find that there are few studies on the chemical ingredients of this plant based on the previous literature and querying a database (CA).…”

Section: Introductionmentioning

confidence: 99%