A gametocidal factor of Oryza glaberrima Steud. in O. sativa L.

Euphytica ◽  
1990 ◽  
Vol 45 (3) ◽  
pp. 191-195 ◽  
Author(s):  
Tomosaburo Yabuno
Keyword(s):  
Oryza Glaberrima ◽  
Gametocidal Factor

scholarly journals Reproductive, pathogenic and genotypic characterisation of five Meloidogyne graminicola populations from the Philippines on susceptible and resistant rice varieties

Nematology ◽  
2018 ◽  
Vol 20 (4) ◽  
pp. 299-318
Author(s):  
Ma. Teodora Nadong Cabasan ◽  
Arvind Kumar ◽  
Stéphane Bellafiore ◽  
Dirk De Waele
Keyword(s):  
Phenotypic Variability ◽  
The Philippines ◽  
Growth And Yield ◽  
Oryza Glaberrima ◽  
Rice Varieties ◽  
Single Nucleotide ◽  
Nematode Reproduction ◽  
Rdna Genes ◽  
Meloidogyne Graminicola ◽  
Disease Induction

Summary Five populations of Meloidogyne graminicola isolated from different rice-growing areas in the Philippines were characterised. The populations showed little phenotypic variability of second-stage juveniles and female perineal pattern. Differences in reproduction among M. graminicola populations were not observed on mature resistant Oryza glaberrima varieties ‘TOG5674’, ‘TOG5675’, ‘RAM131’ and ‘CG14’, or on susceptible O. sativa varieties ‘IR64’ and ‘UPLRi-5’. In all infected rice varieties, plant growth and yield-contributing traits showed no differences among the populations. A search on M. graminicola populations from the Philippines for single-nucleotide polymorphism on the sequences of Internal Transcribed Spacer (ITS) of rDNA genes and mtDNA indicated only few points of heteroplasmy. Nematode reproduction and disease induction of the five M. graminicola populations in the Philippines exerted the same level of aggressiveness and virulence. The absence of resistance-breaking populations of M. graminicola is important for the maintenance of durability of resistance to this important rice pathogen.

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

scholarly journals The African Rice Oryza glaberrima Steud: Knowledge Distribution and Prospects

2012 ◽  
Vol 4 (3) ◽  
Author(s):  
Yves Agnoun ◽  
Samadori S. H. Biaou ◽  
M. Sié ◽  
R. S. Vodouhè ◽  
A. Ahanchédé
Keyword(s):  
Oryza Glaberrima ◽  
African Rice

scholarly journals High-throughput phenotyping reveals a link between transpiration efficiency and transpiration restriction under high evaporative demand and new loci controlling water use-related traits in African rice, Oryza glaberrima Steud.

2021 ◽  
Author(s):  
Pablo Affortit ◽  
Branly Effa Effa ◽  
Mame Sokhatil Ndoye ◽  
Daniel Moukouanga ◽  
Nathalie Luchaire ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Association Studies ◽  
Crop Improvement ◽  
Oryza Glaberrima ◽  
Genome Wide Association Studies ◽  
Transpiration Efficiency ◽  
Evaporative Demand ◽  
African Rice ◽  
Use Efficiency

Because water availability is the most important environmental factor limiting crop production, improving water use efficiency, the amount of carbon fixed per water used, is a major target for crop improvement. In rice, the genetic bases of transpiration efficiency, the derivation of water use efficiency at the whole-plant scale, and its putative component trait transpiration restriction under high evaporative demand, remain unknown. These traits were measured in a panel of 147 African rice Oryza glaberrima genotypes, known as potential sources of tolerance genes to biotic and abiotic stresses. Our results reveal that higher transpiration efficiency is associated with transpiration restriction in African rice. Detailed measurements in a subset of highly differentiated genotypes confirmed these associations and suggested that the root to shoot ratio played an important role in transpiration restriction. Genome wide association studies identified marker-trait associations for transpiration response to evaporative demand, transpiration efficiency and its residuals, that links to genes involved in water transport and cell wall patterning. Our data suggest that root shoot partitioning is an important component of transpiration restriction that has a positive effect on transpiration efficiency in African rice. Both traits are heritable and define targets for breeding rice with improved water use strategies.

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