Oryza sativa Genome resequencing. Oryza sativa

Hybrid weakness is an important post zygotic reproductive barrier between natural populations. Expression of hybrid weakness can lead to significant decrease in yield and even lethality and is thus an undesirable agronomic trait. We observed that F1 hybrids produced from crossing between any two of three Japonica varieties(CH7, CH8, CH9) exhibit hybrid weakness phenotype. Exploring the molecular mechanism underlying hybrid weakness in important crops like rice is worthy. To reveal the genome wide polymorphism of the three japonica rice varieties, we generated a catalog of sequence variants using whole genome Illumina next-generation sequencing data.