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Transcriptome Analyses Throughout Chili Pepper Fruit Development Reveal Novel Insights into the Domestication Process.

Octavio Martínez de la VegaMagda Lisette Arce-RodriguezFernando Hernández-GodínezChristian Escoto-SandovalFelipe Cervantes-HernándezCorina Hayano-KanashiroJosé Juan Ordaz-OrtizM Humberto Reyes-ValdésFernando G Razo-MendivilAna Garcés-ClaverNeftalí Ochoa-Alejo
Published in: Plants (Basel, Switzerland) (2021)
Chili pepper (Capsicum spp.) is an important crop, as well as a model for fruit development studies and domestication. Here, we performed a time-course experiment to estimate standardized gene expression profiles with respect to fruit development for six domesticated and four wild chili pepper ancestors. We sampled the transcriptomes every 10 days from flowering to fruit maturity, and found that the mean standardized expression profiles for domesticated and wild accessions significantly differed. The mean standardized expression was higher and peaked earlier for domesticated vs. wild genotypes, particularly for genes involved in the cell cycle that ultimately control fruit size. We postulate that these gene expression changes are driven by selection pressures during domestication and show a robust network of cell cycle genes with a time shift in expression, which explains some of the differences between domesticated and wild phenotypes.
Keyphrases
  • cell cycle
  • gene expression
  • cell proliferation
  • genome wide
  • poor prognosis
  • single cell
  • dna methylation
  • climate change
  • binding protein
  • copy number
  • rna seq
  • genome wide identification
  • long non coding rna