Genetic diversity of cultivated rice (Oryza sativa L.) and wild rice (Oryza rufipogon Griff.) in Asia, especially in Myanmar, as revealed by organelle markers

2017 ◽  
Vol 65 (3) ◽  
pp. 713-726
Author(s):  
Masako Okoshi ◽  
Tomotaro Nishikawa ◽  
Hiromori Akagi ◽  
Tatsuhito Fujimura
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Wild Rice ◽  
Oryza Sativa L ◽  
Oryza Rufipogon ◽  
Cultivated Rice ◽  
Oryza Rufipogon Griff

scholarly journals Genetic diversity among perennial wild rice Oryza rufipogon Griff., in the Mekong Delta

2019 ◽  
Vol 9 (5) ◽  
pp. 2964-2977
Author(s):  
Dinh T. Lam ◽  
Bui C. Buu ◽  
Nguyen T. Lang ◽  
Kinya Toriyama ◽  
Ikuo Nakamura ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Wild Rice ◽  
Mekong Delta ◽  
Oryza Rufipogon ◽  
Oryza Rufipogon Griff

Extraordinarily polymorphic ribosomal DNA in wild and cultivated rice

Genome ◽  
1996 ◽  
Vol 39 (6) ◽  
pp. 1109-1116 ◽  
Author(s):  
K. D. Liu ◽  
Qifa Zhang ◽  
G. P. Yang ◽  
M. A. Saghai Maroof ◽  
S. H. Zhu ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Ribosomal Dna ◽  
Wild Rice ◽  
Indica Rice ◽  
Intergenic Spacer ◽  
Oryza Rufipogon ◽  
Japonica Rice ◽  
Cultivated Rice ◽  
Spacer Length ◽  
Origin And Evolution

A collection of 481 rice accessions was surveyed for ribosomal DNA (rDNA) intergenic spacer length polymorphism to assess the extent of genetic diversity in Chinese and Asian rice germplasm. The materials included 83 accessions of common wild rice, Oryza rufipogon, 75 of which were from China; 348 entries of cultivated rice (Oryza sativa), representing almost all the rice growing areas in China; and 50 cultivars from South and East Asia. A total of 42 spacer length variants (SLVs) were detected. The size differences between adjacent SLVs in the series were very heterogeneous, ranging from ca. 21 to 311 bp. The 42 SLVs formed 80 different rDNA phenotypic combinations. Wild rice displayed a much greater number of rDNA SLVs than cultivated rice, while cultivated rice showed a larger number of rDNA phenotypes. Indica and japonica groups of O. sativa contained about equal numbers of SLVs, but the SLV distribution was significantly differentiated: indica rice was preferentially associated with longer SLVs and japonica rice with shorter ones. The results may have significant implications regarding the origin and evolution of cultivated rice, as well as the inheritance and molecular evolution of rDNA intergenic spacers in rice. Key words : rDNA, Oryza rufipogon, Oryza sativa, germplasm diversity, evolution.

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