Harrop T. W. R., Mantegazza Otho, Luong A. M., Bethune Kévin, Lorieux Mathias, Jouannic Stefan, Adam Hélène. (2019). A set of AP2-like genes is associated with inflorescence branching and architecture in domesticated rice. Journal of Experimental Botany, 70 (20), p. 5617-5629. ISSN 0022-0957.
Titre du document
A set of AP2-like genes is associated with inflorescence branching and architecture in domesticated rice
Harrop T. W. R., Mantegazza Otho, Luong A. M., Bethune Kévin, Lorieux Mathias, Jouannic Stefan, Adam Hélène
Source
Journal of Experimental Botany, 2019,
70 (20), p. 5617-5629 ISSN 0022-0957
Rice yield is influenced by inflorescence size and architecture, and inflorescences from domesticated rice accessions produce more branches and grains. Neither the molecular control of branching nor the developmental differences between wild and domesticated rice accessions are fully understood. We surveyed phenotypes related to branching, size, and grain yield across 91 wild and domesticated African and Asian accessions. Characteristics related to axillary meristem identity were the main phenotypic differences between inflorescences from wild and domesticated accessions. We used whole transcriptome sequencing in developing inflorescences to measure gene expression before and after the transition from branching axillary meristems to determinate spikelet meristems. We identified a core set of genes associated with axillary meristem identity in Asian and African rice, and another set associated with phenotypic variability between wild and domesticated accessions. AP2/EREBP-like genes were enriched in both sets, suggesting that they are key factors in inflorescence branching and rice domestication. Our work has identified new candidates in the molecular control of inflorescence development and grain yield, and provides a detailed description of the effects of domestication on phenotype and gene expression.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Sciences du monde végétal [076]
