Deepwater response in the African cultivated rice <i>Oryza glaberrima</i>

Partial submergence of Oryza sativa deepwater rice elicits enhancement internodal elongation, referred to as response, conferred by three types genes, SNORKEL1/2 (SK1/2), SEMIDWARF1 (SD1), and ACCELERATOR OF INTERNODE ELONGATION 1 (ACE1). We investigated the presence expression these genes in African cultivated glaberrima relationship between response O. glaberrima. In 49 50 accessions tested, one or two SK were identified, which could be divided into SK1 four SK2. The with SK2 type whose was induced demonstrated rapid elongation under submergence. most accessions, also increased SD1 ACE1 genes. However, did not possess haplotype that is associated high sativa. contrast, they possessed gene similar rice. These results indicate molecular mechanisms underlying induction are found suggest cultivars, including upland can exhibit