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Oryza alta

Manas R Prusty, Sung-Ryul Kim, Ricky Vinarao, Frederickson Entila, James Egdane, Maria G Q Diaz, Kshirod K Jena
Cultivated rice ( Oryza sativa L.) is very sensitive to salt stress. So far a few rice landraces have been identified as a source of salt tolerance and utilized in rice improvement. These tolerant lines primarily use Na+ exclusion mechanism in root which removes Na+ from the xylem stream by membrane Na+ and K+ transporters, and resulted in low Na+ accumulation in shoot. Identification of a new donor source conferring high salt tolerance is imperative. Wild relatives of rice having wide genetic diversity are regarded as a potential source for crop improvement...
2018: Frontiers in Plant Science
Evert Thomas, Eduardo Tovar, Carolina Villafañe, José Leonardo Bocanegra, Rodrigo Moreno
BACKGROUND: Crop wild relatives (CWRs) of rice hold important traits that can contribute to enhancing the ability of cultivated rice (Oryza sativa and O. glaberrima) to produce higher yields, cope with the effects of climate change, and resist attacks of pests and diseases, among others. However, the genetic resources of these species remain dramatically understudied, putting at risk their future availability from in situ and ex situ sources. Here we assess the distribution of genetic diversity of the four rice CWRs known to occur in Colombia (O...
December 2017: Rice
Shuai Sun, Ying Wu, Xiuyun Lin, Jie Wang, Jiamiao Yu, Yue Sun, Yiling Miao, Qiuping Li, Karen A Sanguinet, Bao Liu
BACKGROUND: Hybrid weakness, a phenomenon opposite to heterosis, refers to inferior growth and development in a hybrid relative to its pure-line parents. Little attention has been paid to the phenomenological or mechanistic aspect of hybrid weakness, probably due to its rare occurrence. METHODOLOGY/PRINCIPAL FINDINGS: Here, using a set of interspecific triploid F1 hybrids between Oryza sativa, ssp. japonica (genome AA) and a tetraploid wild rice species, O. alta (genome, CCDD), we investigated the phenotypic and physiological differences between the F1 hybrids and their parents under normal and nitrogen-limiting conditions...
2017: PloS One
K Vaidyanath, K K Raju, G M Reddy
Using the two-dimensional paper-chromatographic technique, free-aminoacid analysis was made on nine diploids and five allotetraploid species of Oryza, to study the biochemical and physiological bases of species relationships. The relationship between different species was inferred on the basis of similarity or differences in polygon patterns of aminoacids, drawn using Ellison's paired affinity values. Among the diploid species, O. sativa, O. perennis subsp. balunga, O. glaberrima and O. breviligulata showed similar polygon patterns, suggesting close relationships...
January 1974: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Z Y Wang, G Second, S D Tanksley
Ninety-three accessions representing 21 species from the genus Oryza were examined for restriction fragment length polymorphism. The majority (78%) of the accessions, for which five individuals were tested, were found to be monomorphic. Most of the polymorphic accessions segregated for only one or two probes and appeared to be mixed pure lines. For most of the Oryza species tested, the majority of the genetic variation (83%) was found between accessions from different species with only 17% between accessions within species...
March 1992: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
X B Li, C Z Liang, H G Wu, W X Zhai, N Huang, L H Zhu
A tandemly repeated DNA sequence (RRS7) was isolated from Oryza alta (CCDD). RRS7-related sequences were also found tandemly arrayed in genomes AA, BB, BBCC, CC, and EE, and a small amount of RRS7-related sequences were detected in genome FF and the Oryza species with unknown genomes. DNA sequence analysis of the 1844-bp insert of RRS7 revealed that it contained six tandemly repeated units, of which five were 155 bp in length and one was 194 bp in length and contained an imperfect internal 39-bp duplication...
May 1996: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Hassan Javed Chaudhary, Guixiang Peng, Mei Hu, Yumei He, Lijuan Yang, Yan Luo, Zhiyuan Tan
Thirty-three endophytic diazotrophs were isolated from surface-sterilized leaves, stem, and roots of wild rice Oryza alta. The SDS-PAGE profile of total protein and insertion sequence-based polymerase chain reaction (IS-PCR) fingerprinting grouped the isolates into four clusters (I-IV). The 16S rRNA gene sequence homology of the representative strains B21, B31, B1, and B23 of clusters I, II, III, and IV were assigned to Pseudomonas oleovorans (99.2% similarity), Burkholderia fungorum (99.4% similarity), Enterobacter cloacae (98...
May 2012: Microbial Ecology
Smruti Das, Monalisa Nayak, B C Patra, B Ramakrishnan, P Krishnan
Wild progenitors of rice (Oryza) are an invaluable resource for restoring genetic diversity and incorporating useful traits back into cultivars. Studies were conducted to characterize the biochemical changes, including SDS-PAGE banding pattern of storage proteins in seeds of six wild species (Oryza alta, O. grandiglumis, O. meridionalis, O. nivara, O. officinalis and O. rhizomatis) of rice stored under high temperature (45 degrees C) and humidity (approixmately 100%) for 15 days, which facilitated accelerated deterioration...
June 2010: Indian Journal of Biochemistry & Biophysics
Fei Lu, Jetty S S Ammiraju, Abhijit Sanyal, Shengli Zhang, Rentao Song, Jinfeng Chen, Guisheng Li, Yi Sui, Xiang Song, Zhukuan Cheng, Antonio Costa de Oliveira, Jeffrey L Bennetzen, Scott A Jackson, Rod A Wing, Mingsheng Chen
Comparative genomics is a powerful tool to decipher gene and genome evolution. Placing multiple genome comparisons in a phylogenetic context improves the sensitivity of evolutionary inferences. In the genus Oryza, this comparative approach can be used to investigate gene function, genome evolution, domestication, polyploidy, and ecological adaptation. A large genomic region surrounding the MONOCULM1 (MOC1) locus was chosen for study in 14 Oryza species, including 10 diploids and 4 allotetraploids. Sequencing and annotation of 18 bacterial artificial chromosome clones for these species revealed highly conserved gene colinearity and structure in the MOC1 region...
February 10, 2009: Proceedings of the National Academy of Sciences of the United States of America
Guixiang Peng, Qinghua Yuan, Huaxing Li, Wu Zhang, Zhiyuan Tan
During a study of endophytic nitrogen-fixing bacteria present in the wild rice species Oryza alta, eight novel isolates were obtained from surface-sterilized roots and classified in the genus Rhizobium on the basis of almost-complete 16S rRNA gene sequence analysis. These strains can nodulate Phaseolus vulgaris and Glycine max. The highly similar protein patterns, DNA fingerprint patterns of insertion sequence-based PCR (IS-PCR) and DNA-DNA hybridizations showed that these novel isolates were members of the same species...
September 2008: International Journal of Systematic and Evolutionary Microbiology
L Mao, L Zhu, Q Zhou, X Wang, H Hu
RFLP analyses were carried out in the progeny from a cross of two phylogenetically distant rice species, wild rice Oryza alta Swallen (CCDD, 2n = 48) and cultivated rice O. sativa L. (AA, 2n = 24). The sterile plants gave heterozygous RFLP patterns at most of the loci detected. They looked more like their wild rice parent, with 36 chromosomes in their root-tip cells and pollen mother cells. In two partially fertile plants, however, most of the markers that were used showed RFLP patterns similar to the cultivated parent, O...
October 1995: Genome Génome / Conseil National de Recherches Canada
A Serda Kantarcioğlu, Ayhan Yücel, Keisuke Nagao, Tomotaka Sato, Ender Inci, Sahin Ogreden, Asim Kaytaz, Saadet Alan, Zehra Bozdağ, Naci Edali, Mehmet Sar, Nuray Kepil, Büge Oz, Kemal Altas
We report a histologically and mycologically proven sinonasal mucormycosis case causing palatal necrosis in a nondiabetic patient with renal failure. Mycological examination of Giemsa stained imprinted tissue preparations revealed abundant yeast-like cells besides the typical mucoraceous hyphae. The fungus was isolated from surgical specimens and identified as Rhizopus oryzae by phenotypic and genotypic tests. Laboratory studies were performed to investigate the association of the yeast-like cells observed in tissue specimens and the fungus recovered in culture...
September 2006: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
E A Veasey, M G Karasawa, P P Santos, M S Rosa, E Mamani, G C X Oliveira
BACKGROUND AND AIMS: The aim of this paper was to verify the variation in the loss of seed dormancy during after-ripening and the interspecific and interpopulation variability in the degree of dormancy of seven wild and two cultivated rice species comprising 21 populations and two cultivars. METHODS: Four wild rice species from South America, Oryza glumaepatula, O. latifolia, O. grandiglumis and O. alta, and two O. sativa cultivars were tested in one experiment...
December 2004: Annals of Botany
Hiroyoshi Omokawa, Hiroshi Murata, Shoko Kobayashi
The results presented here support the hypothesis that plants of the tribe Oryzeae respond enantioselectively and homogeneously to optically active 1-alpha-methylbenzyl-3-p-tolylurea (MBTU) in root growth inhibition, in contrast to Echinochloa species. The Oryzeae plants tested in this study belong to different genera (Oryza, Leersia, Chikusichloa and Zizania), to different species (O sativa, O glaberrima, O alta, O coarctata, O latifolia, O minuta, O rufipogon), to various ecospecies of Oryza (japonica, indica, japonica x indica, javanica) and to different levels of evolution [cultivated rice (O sativa and O glaberrima) and ancestral wild rice species]...
January 2004: Pest Management Science
G S Buso, P H Rangel, M E Ferreira
A sample of American wild rice and other accessions of the genus Oryza were studied at polymorphic regions of nuclear, mitochondrial, and chloroplastic genomes. First, flow cytometry, genome-specific RAPD markers, and chromosome counting were utilized to verify the original ploidy and classification of 230 accessions studied. Based on these methods, 8% of the accessions were considered to be misclassified either taxonomically or as a result of contamination. Second, a fine resolution analysis was conducted at genomic regions sampled at random by RAPD markers and at specific sites of the chloroplast and mitochondrial DNA by cleaved amplified polymorphic sequence (CAPS) analysis...
June 2001: Genome Génome / Conseil National de Recherches Canada
T Abe, T Edanami, E Adachi, T Sasahara
Restriction fragment length polymorphism (RFLP) of mitochondrial DNA in the genus Oryza was surveyed using 20 accessions including 11 species and a single endonuclease, EcoRI. RFLPs were visualized by Southern hybridization with eight rice mitochondrial DNA probes labeled non-radioactively with digoxigenin-dUTP. A total of 66 bands were obtained from all of the accessions. The total number of fragments per plant was higher in diploid A-genome species (an average of 35.3) than that in diploid B- and C-genome species and allotetraploid BC- and CD-genome species (an average of 28...
February 1999: Genes & Genetic Systems
R K Aggarwal, D S Brar, G S Khush
The genus Oryza to which cultivated rice belongs has 24 species (2n = 24 or 48), representing seven genomes (AA, BB, CC, EE, FF, BBCC and CCDD). The genomic constitution of five of these species is unknown. These five species have been grouped into two species complexes, the tetraploid ridleyi complex (O. ridleyi, O. longiglumis) and the diploid meyeriana complex (O. granulata, O. meyeriana, O. indandamanica). To evaluate the genomic structure of these species in terms of divergence at the molecular level vis-a-vis other known genomes of Oryza, we used the total genomic DNA hybridization approach...
March 18, 1997: Molecular & General Genetics: MGG
K K Jena, G Kochert
Restriction fragment length polymorphisms (RFLPs) were studied in fourteen accessions of CCDD genome allotetraploid wild rice species (Oryza latifolia, O. alta and O. grandiglumis). Fourteen nuclear RFLP markers previously mapped in AA genome-cultivated rice were used as probes. A phylogenetic tree, constructed by parsimony analysis based on RFLPs, grouped the accessions according to their geographic origin from Central or South America. Oryza alta, O. grandiglumis and one accession of O. latifolia grouped together as a subgroup, and our results suggested that the three taxa should be considered as populations of a single complex species...
May 1991: Plant Molecular Biology
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