scholarly journals Call of the wild rice: Oryza rufipogon shapes weedy rice evolution in Southeast Asia

2018 ◽  
Vol 12 (1) ◽  
pp. 93-104 ◽  
Author(s):  
Cynthia C. Vigueira ◽  
Xinshuai Qi ◽  
Beng‐Kah Song ◽  
Lin‐Feng Li ◽  
Ana L. Caicedo ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Wild Rice ◽  
Oryza Rufipogon ◽  
Weedy Rice

Genetic Analysis of Cold Tolerance at the Seedling Stage in Dongxiang Wild Rice (Oryza rufipogon)

2011 ◽  
Vol 46 (1) ◽  
pp. 21-27
Author(s):  
Jian Shuirong ◽  
Wan Yong ◽  
Luo Xiangdong ◽  
Fang Jun ◽  
Chu Chengcai ◽  
...  
Keyword(s):  
Genetic Analysis ◽  
Cold Tolerance ◽  
Wild Rice ◽  
Oryza Rufipogon ◽  
Seedling Stage ◽  
Dongxiang Wild Rice

scholarly journals Identification of long noncoding natural antisense transcripts (lncNATs) correlated with drought stress response in wild rice (Oryza nivara)

2021 ◽  
Author(s):  
Yong-Chao Xu ◽  
Jie Zhang ◽  
Dong-Yan Zhang ◽  
Ying-Hui Nan ◽  
Song Ge ◽  
...  
Keyword(s):  
Drought Stress ◽  
Stress Response ◽  
Wild Rice ◽  
Oryza Rufipogon ◽  
Cultivated Rice ◽  
Antisense Transcripts ◽  
High Genetic Diversity ◽  
Natural Antisense Transcripts ◽  
Form Complex ◽  
Oryza Nivara

Abstract Background Wild rice, including Oryza nivara and Oryza rufipogon, which are considered as the ancestors of Asian cultivated rice (Oryza sativa L.), possess high genetic diversity and serve as a crucial resource for breeding novel cultivars of cultivated rice. Although many rice domestication related traits, such as seed shattering and plant architecture, have been intensively studied at the phenotypic and genomic levels, further investigation is needed to understand the molecular basis of phenotypic differences between cultivated and wild rice. Drought stress is one of the most severe abiotic stresses affecting rice growth and production. Adaptation to drought stress involves a cascade of genes and regulatory factors that form complex networks. Long noncoding natural antisense transcripts (lncNATs), a class of long noncoding RNAs (lncRNAs), regulate the corresponding sense transcripts and play an important role in plant growth and development. However, the contribution of lncNATs to drought stress response in wild rice remains largely unknown. Results Here, we conducted strand-specific RNA sequencing (ssRNA-seq) analysis of Nipponbare (O. sativa ssp. japonica) and two O. nivara accessions (BJ89 and BJ278) to determine the role of lncNATs in drought stress response in wild rice. A total of 1,246 lncRNAs were identified, including 1,091 coding–noncoding NAT pairs, of which 50 were expressed only in Nipponbare, and 77 were expressed only in BJ89 and/or BJ278. Of the 1,091 coding–noncoding NAT pairs, 240 were differentially expressed between control and drought stress conditions. Among these 240 NAT pairs, 12 were detected only in Nipponbare, and 187 were detected uniquely in O. nivara. Furthermore, 10 of the 240 coding–noncoding NAT pairs were correlated with genes previously demonstrated to be involved in stress response; among these, nine pairs were uniquely found in O. nivara, and one pair was shared between O. nivara and Nipponbare. Conclusion We identified lncNATs associated with drought stress response in cultivated rice and O. nivara. These results will improve our understanding of the function of lncNATs in drought tolerance and accelerate rice breeding.

scholarly journals Competition among wild rice, landrace, improved cultivar and F1 hybrid rice

2018 ◽  
Vol 18 ◽  
pp. 29-40
Author(s):  
Bal Krishna Joshi ◽  
Sanjaya Gyawali ◽  
Surya Narayan Sah ◽  
Rewati Raman Chaudhary
Keyword(s):  
Grain Yield ◽  
Wild Rice ◽  
Growth Period ◽  
Oryza Rufipogon ◽  
Panicle Length ◽  
F1 Hybrid ◽  
Panicle Number ◽  
Growing Environment ◽  
Different Response ◽  
Competition Environment

Four genotypes, namely Oryza rufipogon, F1 of IR68888A/Chaite-6, Chaite-6 and Ratodhan were grown in crop and competition environment at Rampur, Nepal to study the effect of genotypes mixture on the characters. Univariate, multivariate and correlation methods of analysis were applied. Seven characters namely panicle length, panicle number, grain yield, harvest index, internode length and leaf width showed significantly different response in crop and competition environment. The performance of cultivar was poor in competition environment than hybrid and wild rice. Hybrid and wild rice showed longer panicle length in competition environment. Significant reduction in panicle number was found in cultivars. The pattern of tiller number over the growth period showed that the competition started after 50 days of seeding. Grain yield of cultivars was significantly reduced in competition environment. Considering the most important characters, hybrid was best competitor and local landrace (Ratodhan) was poorest competitor. Significant variations in culm characters were not found between two environments but leaf characters varied significantly. Highest increment in plant height was found in F1 grown in competition than crop environment. Relationship between characters was affected by growing environment. Among 162 pairs of characters r-value of six and 36 pairs were highly significant different from zero in crop and competition environment respectively. Multivariate analysis indicates that growing environment does not suppress the genetic characters. Competition among the tested genotypes exists even in the recommended spacing. Competition should be studied in detail planting at different spacing.

scholarly journals Identification of a Resistance Gene bls1 to Bacterial Leaf Streak in Wild Rice Oryza rufipogon Griff.

2012 ◽  
Vol 11 (6) ◽  
pp. 962-969 ◽  
Author(s):  
Wen-ai HE ◽  
Da-hui HUANG ◽  
Rong-bai LI ◽  
Yong-fu QIU ◽  
Jian-dong SONG ◽  
...  
Keyword(s):  
Resistance Gene ◽  
Wild Rice ◽  
Oryza Rufipogon ◽  
Bacterial Leaf Streak ◽  
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
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