RT Journal Article
SR Electronic
T1 Transcriptomic Analyses Throughout Chili Pepper Fruit Development Reveal Novel Insights into Domestication Process
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2020.10.05.326470
DO 10.1101/2020.10.05.326470
A1 Octavio Martínez
A1 Magda L. Arce-Rodríguez
A1 Fernando Hernández-Godínez
A1 Christian Escoto-Sandoval
A1 Felipe Cervantes-Hernández
A1 Corina Hayano-Kanashiro
A1 José J. Ordaz-Ortiz
A1 M. Humberto Reyes-Valdés
A1 Fernando G. Razo-Mendivil
A1 Ana Garcés-Claver
A1 Neftalí Ochoa-Alejo
YR 2020
UL http://biorxiv.org/content/early/2020/10/09/2020.10.05.326470.abstract
AB Chili pepper (Capsicum spp.) is both an important crop and a model for domestication studies. Here we performed a time course experiment to estimate standardized gene expression profiles across fruit development for six domesticated and four wild chili pepper ancestors. We sampled the transcriptome every 10 days, from flower to fruit at 60 Days After Anthesis (DAA), and found that the mean standardized expression profile 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.