scholarly journals Allelic data revealing interrelatedness in rice species (Oryza sativa, Oryza glaberrima, Oryza barthii) and the interspecific hybrids (NERICA)

2013 ◽  
Vol 5 (2) ◽  
pp. 12-19
Author(s):  
R. Aliyu
Keyword(s):  
Oryza Sativa ◽  
Interspecific Hybrids ◽  
Oryza Glaberrima ◽  
Oryza Barthii

scholarly journals Oryza sativa cv. Nipponbare and Oryza barthii as Unexpected Tolerance and Susceptibility Sources Against Schizotetranychus oryzae (Acari: Tetranychidae) Mite Infestation

2021 ◽  
Vol 12 ◽  
Author(s):  
Giseli Buffon ◽  
Édina Aparecida dos Reis Blasi ◽  
Thainá Inês Lamb ◽  
Janete Mariza Adamski ◽  
Joséli Schwambach ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Energy Production ◽  
Leaf Damage ◽  
Mite Infestation ◽  
Weedy Rice ◽  
Oryza Glaberrima ◽  
Primary Metabolism ◽  
Related Proteins ◽  
Oryza Barthii ◽  
Differentially Abundant Proteins

Cultivated rice (Oryza sativa L.) is frequently exposed to multiple stresses, including Schizotetranychus oryzae mite infestation. Rice domestication has narrowed the genetic diversity of the species, leading to a wide susceptibility. This work aimed to analyze the response of two African rice species (Oryza barthii and Oryza glaberrima), weedy rice (O. sativa f. spontanea), and O. sativa cv. Nipponbare to S. oryzae infestation. Surprisingly, leaf damage, histochemistry, and chlorophyll concentration/fluorescence indicated that the African species present a higher level of leaf damage, increased accumulation of H2O2, and lower photosynthetic capacity when compared to O. sativa plants under infested conditions. Infestation decreased tiller number, except in Nipponbare, and caused the death of O. barthii and O. glaberrima plants during the reproductive stage. While infestation did not affect the weight of 1,000 grains in both O. sativa, the number of panicles per plant was affected only in O. sativa f. spontanea, and the percentage of full seeds per panicle and seed length were increased only in Nipponbare. Using proteomic analysis, we identified 195 differentially abundant proteins when comparing susceptible (O. barthii) and tolerant (Nipponbare) plants under control and infested conditions. O. barthii presents a less abundant antioxidant arsenal and is unable to modulate proteins involved in general metabolism and energy production under infested condition. Nipponbare presents high abundance of detoxification-related proteins, general metabolic processes, and energy production, suggesting that the primary metabolism is maintained more active compared to O. barthii under infested condition. Also, under infested conditions, Nipponbare presents higher levels of proline and a greater abundance of defense-related proteins, such as osmotin, ricin B-like lectin, and protease inhibitors (PIs). These differentially abundant proteins can be used as biotechnological tools in breeding programs aiming at increased tolerance to mite infestation.

Aroma chemistry of African Oryza glaberrima and Oryza sativa rice and their interspecific hybrids

2013 ◽  
Vol 94 (4) ◽  
pp. 727-735 ◽  
Author(s):  
Sungeun Cho ◽  
Edwin Nuijten ◽  
Robert L Shewfelt ◽  
Stanley J Kays
Keyword(s):  
Oryza Sativa ◽  
Interspecific Hybrids ◽  
Oryza Glaberrima

scholarly journals Molecular characterization and genetic diversity of different genotypes of Oryza sativa and Oryza glaberrima

2017 ◽  
Vol 30 ◽  
pp. 48-57 ◽  
Author(s):  
Caijin Chen ◽  
Wenchuang He ◽  
Tondi Yacouba Nassirou ◽  
Athanase Nsabiyumva ◽  
Xilong Dong ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Molecular Characterization ◽  
Oryza Glaberrima

Water extraction and root traits in Oryza sativa × Oryza glaberrima introgression lines under different soil moisture regimes

2013 ◽  
Vol 40 (1) ◽  
pp. 54 ◽  
Author(s):  
Abubakary A. Kijoji ◽  
Susan Nchimbi-Msolla ◽  
Zakaria L. Kanyeka ◽  
Stephen P. Klassen ◽  
Rachid Serraj ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Water Uptake ◽  
Root Traits ◽  
Genetic Differences ◽  
Introgression Lines ◽  
Sub Saharan Africa ◽  
Future Research ◽  
Oryza Glaberrima ◽  
Soil Drying

Drought is a major constraint to rainfed rice production in some parts of sub Saharan Africa (SSA) because of irregular and low rainfall. Improving root water uptake during progressive soil drying could contribute to terminal drought stress resistance. Two lysimeter experiments were conducted using 200 introgression lines (ILs) derived from Oryza sativa L. × Oryza glaberrima Steud. crosses (IR64/RAM54 and IR64/RAM90) to characterise water uptake and root traits under progressive soil drying and to assess genetic differences among these lines in relation to drought stress. The lysimeter facility setup and protocols for simultaneous monitoring of water uptake rates and leaf area are described. Significant genetic variability for water uptake and root traits among the ILs was observed under drought stress. Water uptake in the drought stress treatments was correlated with root length density (RLD) and root dry matter (RDM) at lower soil depths. The highest RLD values at depth were observed among the RAM90 ILs and genetic differences were observed between RAM90 and RAM54 populations, implying that accession RAM90 could be used as a source for improving drought avoidance in lowland rice. The ILs with greater water uptake identified in this study will be used in future research for improving drought resistance of rice in SSA.

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