Oryza rufipogon

Fine mapping of a grain weight quantitative trait locus, qGW6, using near isogenic lines derived from Oryza rufipogon IRGC105491 and Oryza sativa cultivar MR219

M. S. Ngu, Thomson, M. J., Bhuiyan, M. A. R., Ho, C., and Wickneswari, R., Fine mapping of a grain weight quantitative trait locus, qGW6, using near isogenic lines derived from Oryza rufipogon IRGC105491 and Oryza sativa cultivar MR219, vol. 13, pp. 9477-9488, 2014.

Grain weight is a major component of rice grain yield and is controlled by quantitative trait loci. Previously, a rice grain weight quantitative trait locus (qGW6) was detected near marker RM587 on chromosome 6 in a backcross population (BC2F2) derived from a cross between Oryza rufipogon IRGC105491 and O. sativa cv. MR219. Using a BC2F5 population, qGW6 was validated and mapped to a region of 4.8 cM (1.2 Mb) in the interval between RM508 and RM588.

Identification of quantitative trait loci for blast resistance in BC2F3 and BC2F5 advanced backcross families of rice

H. A. Rahim, Bhuiyan, M. A. R., Lim, L. S., Sabu, K. K., Saad, A., Azhar, M., and Wickneswari, R., Identification of quantitative trait loci for blast resistance in BC2F3 and BC2F5 advanced backcross families of rice, vol. 11, pp. 3277-3289, 2012.

Advanced backcross families derived from Oryza sativa cv MR219/O. rufipogon IRGC105491 were utilized for identification of quantitative trait loci (QTL) for blast resistance using simple sequence repeat markers. Two hundred and sixty-one BC2F3 families were used to construct a linkage map, using 87 markers, which covered 2375.2 cM of 12 rice chromosomes, with a mean density of 27.3 cM. The families were evaluated in a greenhouse for resistance to blast disease caused by pathotypes P7.2 and P5.0 of Magnaporthe oryzae.

Variation of the OsGI intron and its phenotypic associations in Oryza rufipogon Griff. and Oryza sativa L.

Y. Dong, Chen, Z., Pei, X., Wang, F., Yuan, Q., Wu, H., Jia, S., and Peng, Y., Variation of the OsGI intron and its phenotypic associations in Oryza rufipogon Griff. and Oryza sativa L., vol. 12, pp. 2652-2669, 2013.

We analyzed intron 9 of the OsGI gene in Oryza rufipogon and Oryza sativa in order to investigate evolutionary relationships in rice and the relationship between intron variation and phenotype. OsGI-9 was cloned in 38 O. rufipogon populations and in 139 O. sativa cultivars and the phylogeny was reconstructed. Seed cold tolerance and dormancy were quantified in O. sativa. Three OsGI-9 band types occurred in O.

Genome-wide multilocus analysis of intraspecific differentiation in Oryza rufipogon Griff. from China and the influence of introgression from O. sativa L.

Y. B. Dong, Li, F., Pei, X. W., Wang, F., Yuan, Q. H., Wu, H. J., Jia, S. R., and Peng, Y. F., Genome-wide multilocus analysis of intraspecific differentiation in Oryza rufipogon Griff. from China and the influence of introgression from O. sativa L., vol. 12, pp. 6103-6119, 2013.

Twenty-five populations of Oryza rufipogon from China and 144 cultivars of Oryza sativa were selected for this study. Based on the DNA fragment of Ehd1-4 and subspecies-specific sequence-tagged site markers in different chromosomes, intraspecific differentiation in O. rufipogon from China was analyzed. The introgression from O. sativa to O. rufipogon was also analyzed based on simple sequence repeat markers. The results revealed that the DNA fragment of Ehd1-4 could distinguish the O.

Subscribe to Oryza rufipogon