Learn More
MicroRNAs (miRNAs) are indispensable regulators for development and defense in eukaryotes. However, the miRNA species have not been explored for rice (Oryza sativa) immunity against the blast fungus Magnaporthe oryzae, the most devastating fungal pathogen in rice production worldwide. Here, by deep sequencing small RNA libraries from susceptible and(More)
Plant mechanical strength is an important agronomic trait of rice. An ethyl methane sulfonate (EMS)-induced rice mutant, fragile plant 2 (fp2), showed morphological changes and reduced mechanical strength. Genetic analysis indicated that the brittle of fp2 was controlled by a recessive gene. The fp2 gene was mapped on chromosome 10. Anatomical analyses(More)
A new double-haploid (rdh) rice plant with purple stigma and red seeds was discovered by tissue culture. Genetic analysis suggested that the trait of rdh purple stigma was controlled by a pair of dominant gene. Polymorphic analysis of microsatellite markers demonstrated that the purple stigma gene of rdh was located on rice chromosome 6 at 4.2 cM, 0.35 cM(More)
Polyploid strain 149-B, that was generated naturally from a rice twin-seedling population SAR-2, has been determined as triploid (2n = 36). It was then used as the female parent crossing with a normal diploid variety SH R363. From its F2 generation we obtained a genetic-stable population. To prove the uniformity of such a population, SSR markers were used(More)
Classic Mendelian genetics declares that hybrids inherit genomic information from both male and female parents, and that alleles should be heterozygous in F1 plants. A few exceptions to this principle have been reported, but most of them are restricted to either a limited set of specific genes or specific types of alleles. Here, we show that a rice triploid(More)
Whole genome duplication (WGD) is a major force in angiosperm evolution. Whether WGD is accompanied by the evolution of epigenetic regulators remains to be explored. Here we investigate whole genome methylation, gene expression, and miRNA regulation among monoploid, diploid, and triploid rice plants isolated from a twin-seedling population. The DNA(More)
One hundred and thirty hybrids derived from the crosses between nine rice strains stabilized in early generation and seven cultivars (Oryza sativa L.). In their F2 populations, 32 uniform strains of different agronomic traits were observed. In the same combination of these uniform strains,there were strains segregating in the Mendelian manner. SSR markers(More)
Reciprocal crosses between red and achromatic rice revealed that the seed color of F1 was determined by its female parent. According to the seed color and plant segregation ratio of F1, F2, and F3 generations, the red phenotype of red double-haploid seed was determined by a dominant, monogene with maternal effect. Histological study showed that the red(More)
Genomic imprinting refers to the phenomenon that the expression of a gene copy depends on its parent of origin. The Arabidopsis imprinted FIS (Fertilisation-independent seed) genes, mea, fis2, and fie, play essential roles in the repression of central cell and the regulation of early endosperm development. fis mutants display two phenotypes: autonomous(More)
Rice is one of the most important staple crops. It has been the major focus in breeding program to improve grain yield. A unique feature of tetraploid rice is the increased grain size and weight compared to diploid. Therefore, investigating the effects of genome doubling on expression of genes regulating grain size is important for yield improvement in rice(More)