Seed-Specific Overexpression of SPL12 and IPA1 Improves Seed Dormancy and Grain Size in Rice

Seed-Specific Overexpression of SPL12 and IPA1 Improves Seed Dormancy and Grain Size in Rice

Blog Article

Pre-harvest sprouting (PHS) often results in reduced grain yield and quality Assisted Opening and is a major problem in cereal production.Improved seed dormancy would inhibit PHS.Here we show that seed-specific overexpression of two SQUAMOSA-PROMOTER BINDING PROTEIN-LIKE (SPL) genes SPL12 and IPA1 enhances seed dormancy and inhibits PHS without noticeable effects on shoot architecture in rice.In addition, seed-specific overexpression of IPA1 also increases grain size and thus improves grain productivity.Furthermore, our results suggest that SPL12 enhances the seed dormancy through directly regulating many genes in the gibberellin 2 Pc. Living Room Package w/ Chair (GA) pathway.

This research provides an efficient method to suppress PHS and will facilitate breeding elite crop varieties.