Genome-wide genic SSR marker development for the endangered Dongxiang wild rice (Oryza rufipogon)

2016 ◽  
Vol 15 (6) ◽  
pp. 566-569
Author(s):  
Jiankun Xie ◽  
Meng Zhang ◽  
Jia Sun ◽  
Fantao Zhang
Keyword(s):  
Ssr Markers ◽  
Wild Rice ◽  
Pcr Amplification ◽  
Oryza Rufipogon ◽  
Sequencing Technology ◽  
Cultivated Rice ◽  
Genic Ssr ◽  
Genome Wide ◽  
Dongxiang Wild Rice ◽  
Simple Sequence

AbstractDongxiang wild rice (Oryza rufipogon, DXWR), one of the species of common wild rice, is regarded as an important genetic resource for the improvement of cultivated rice (Oryza sativa). Molecular markers are reliable tools that can greatly accelerate the breeding process and have been widely used in various species. In the present study, a total of 3681 genic simple sequence repeat (SSR) markers were developed for DXWR based on transcriptome sequencing technology. Additionally, 25 primer pairs were randomly selected and synthesized for the verification. Among them, 18 (72%) primer pairs were successfully amplified in PCR amplification with genomic DNA of DXWR and also had abundant polymorphisms between DXWR and cultivated rice. These novel genic SSR markers will enrich current genomic resources for DXWR, and provide an effective tool for genetic study and molecular marker assisted breeding for this valuable and endangered germplasm.

scholarly journals Genome-wide development of lncRNA-derived-SSR markers for Dongxiang wild rice (Oryza rufipogon Griff.)

2021 ◽  
Author(s):  
Wanling Yang ◽  
Yuanwei Fan ◽  
Yong Chen ◽  
Gumu Ding ◽  
Hu Liu ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Ssr Markers ◽  
Stress Responses ◽  
Wild Rice ◽  
Diversity Index ◽  
Oryza Rufipogon ◽  
Coding Sequences ◽  
Genome Wide ◽  
Ssr Loci ◽  
Dongxiang Wild Rice

AbstractDongxiang wild rice (Oryza rufipogon Griff., DXWR) is the northernmost distributed common wild rice found in the world. It contains a large number of agronomically valuable genes, which makes it a natural gene pool for rice breeding. Molecular markers, especially simple repeat sequence (SSR) markers, play important roles in crop breeding. Although a large number of SSR markers have been developed, most of them are derived from the genome coding sequences, rarely from non-coding sequences. Meanwhile, long non-coding RNAs (lncRNAs), which are derived from the transcription of non-coding sequences, play vital roles in plant growth, development and stress responses. In this study, 1878 SSR loci were detected from the lncRNA sequences of DXWR, and 1258 lncRNA-derived-SSR markers were developed on the genome-wide scale. To verify the validity and applicability of these markers, 72 pairs of primers were randomly selected to test 44 rice materials. The results showed that 42 (58.33%) pairs of primers have abundant polymorphism among these rice materials; the polymorphism information content (PIC) values ranged from 0.04 to 0.87 with an average of 0.50; the genetic diversity index of SSR loci varied from 0.04 to 0.88 with an average of 0.56; and the number of alleles per marker ranged from 2 to 11 with an average of 4.36. Thus, we concluded that these lncRNA-derived-SSR markers are a very useful source for future basic and applied research, including genetic diversity analysis, QTL mapping, and molecular breeding programs, to make good use of the elite lncRNA genes from DXWR.

Genome-wide SNPs detection by genomic comparison between Dongxiang wild rice (Oryza rufipogon) and cultivated rice Nipponbare (Oryza sativa ssp. japonica)

2017 ◽  
Vol 16 (4) ◽  
pp. 386-389
Author(s):  
Meng Zhang ◽  
Wenyang Huang ◽  
Zijun Xia ◽  
Jiahui Liu ◽  
Jiankun Xie ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Genetic Markers ◽  
Genome Sequencing ◽  
Wild Rice ◽  
Oryza Rufipogon ◽  
Cultivated Rice ◽  
Genomic Comparison ◽  
Germplasm Resource ◽  
Genome Wide ◽  
Dongxiang Wild Rice

AbstractDongxiang wild rice (Oryza rufipogon, DXWR) exhibits valuable agronomic traits and represents a precious germplasm resource for rice breeding. The use of genetic markers can greatly speed up the breeding process and facilitate research on genetics and genomics. In our previous study, we identified insertion–deletion polymorphisms between DXWR and cultivated rice Nipponbare (Oryza sativa ssp. japonica), using whole-genome sequencing in DXWR. In this study, to further explore the genetic variations and enrich the available genetic markers of DXWR, we identified 1,089,478 single-nucleotide polymorphisms (SNPs) (corresponding to one SNP per 0.33 kb of the genome) by genomic comparison between DXWR and Nipponbare, using the genome sequencing data and bioinformatics approaches. Furthermore, the accuracy of the identified SNPs was also validated by polymerase chain reaction amplification and Sanger sequencing. This genome-wide SNPs identification greatly increases the number of genetic markers available for DXWR and provides new opportunities to exploit this valuable and endangered germplasm resource.

scholarly journals Genome-wide development of lncRNA-derived-SSR markers for Dongxiang wild rice (Oryza rufipogon Griff.)

2022 ◽  
pp. 1-4
Author(s):  
Wanling Yang ◽  
Yuanwei Fan ◽  
Yong Chen ◽  
Gumu Ding ◽  
Hu Liu ◽  
...  
Keyword(s):  
Ssr Markers ◽  
Stress Responses ◽  
Wild Rice ◽  
Diversity Index ◽  
Repeat Sequence ◽  
Oryza Rufipogon ◽  
Coding Sequences ◽  
Genome Wide ◽  
Ssr Loci ◽  
Dongxiang Wild Rice

Abstract Dongxiang wild rice (Oryza rufipogon Griff.) (DXWR) is the northernmost distributed wild rice found in the world. Similar to other populations of O. rufipogon, DXWR contains a large number of agronomically valuable genes, which makes it a natural gene pool for rice breeding. Molecular markers, especially simple repeat sequence (SSR) markers, play important roles in plant breeding. Although a large number of SSR markers have been developed, most of them are derived from the genome coding sequences, rarely from non-coding sequences. Meanwhile, long non-coding RNAs (lncRNAs), which are derived from the transcription of non-coding sequences, play vital roles in plant growth, development and stress responses. In our previous study, we obtained 1655 lncRNA transcripts from DXWR using strand-specific RNA sequencing. In this study, 1878 SSR loci were detected from the lncRNA sequences of DXWR, and 1258 lncRNA-derived-SSR markers were developed on the genome-wide scale. To verify the validity and applicability of these markers, 72 pairs of primers were randomly selected to test 44 rice accessions. The results showed that 42 (58.33%) pairs of primers have abundant polymorphism among these rice materials; the polymorphism information content values ranged from 0.04 to 0.87 with an average of 0.50; the genetic diversity index of SSR loci varied from 0.04 to 0.88 with an average of 0.56; and the number of alleles per marker ranged from 2 to 11 with an average of 4.36. Thus, we concluded that these lncRNA-derived-SSR markers are a very useful source for future basic and applied research.

Application of SV markers developed from Dongxiang common wild rice in analysis of cultivated rice

2019 ◽  
Vol 17 (5) ◽  
pp. 448-451
Author(s):  
Fantao Zhang ◽  
Yuan Luo ◽  
Bin Ai ◽  
Yong Chen ◽  
Weidong Qi ◽  
...  
Keyword(s):  
Wild Rice ◽  
Oryza Rufipogon ◽  
Genomic Research ◽  
Cultivated Rice ◽  
Structural Variations ◽  
Rice Varieties ◽  
Common Wild Rice ◽  
Genome Wide ◽  
Rice Chromosomes ◽  
Molecular Marker Development

AbstractDongxiang common wild rice (Oryza rufipogon Griff., DXWR) is an important genetic resource for the improvement of cultivated rice. For the past three decades, great achievements have been made in the field of molecular marker development. Although structural variations (SVs) had been studied between DXWR and Nipponbare (Oryza sativa L. ssp. japonica), the development and application of SV markers in DXWR has not been reported. In this study, based on the genome-wide SV loci, we developed and synthesized a total of 195 SV markers that were evenly distributed across the 12 rice chromosomes. Then, these markers were tested for their stabilities and polymorphisms. Of these 195 markers, 147 (75.4%) were successfully amplified and displayed abundant polymorphisms between DXWR and Nipponbare. Meanwhile, through the genotyping of 20 rice varieties from 13 countries and areas, we concluded that these SV markers have a wide application prospect in the analysis of cultivated rice. Therefore, these molecular markers greatly enrich the number of markers available for DXWR, which will facilitate genomic research and molecular breeding for this important and endangered germplasm resource.

Phosphate Solubilizing Rhizospherebacterial T21 Isolated from Dongxiang Wild Rice Species Promotes Cultivated Rice Growth

2011 ◽  
Vol 108 ◽  
pp. 167-175 ◽  
Author(s):  
Qing Gui Zeng ◽  
Fei Luo ◽  
Zhi Bin Zhang ◽  
Ri Ming Yan ◽  
Du Zhu
Keyword(s):  
Plant Growth ◽  
Wild Rice ◽  
Pantoea Agglomerans ◽  
Oryza Rufipogon ◽  
Plant Growth Promoting Bacteria ◽  
Cultivated Rice ◽  
Wild Rice Species ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Dongxiang Wild Rice

The capability of bacterial strain T21 isolated from Dongxiang wild rice (Oryza rufipogon) rhizosphere to behave as plant growth promoting bacteria (PGPB) was investigated. Rhizosphere bacteria T21 showed P-solubilizing capability when cultured in the PVK medium amended with tricalcium phosphate. The strain T21 also showed nitrogen-fixing activity in N-free medium, and produced indole-3-acetic (IAA) and siderophore. The strain T21 was identified as Pantoea agglomerans by morphology, physiological and biochemical properties, and 16S rDNA sequence analysis. The strain T21 was formulated as an inoculant in order to evaluate its growth promotion effect in the field when applied on the cultivated rice at the sowing time. It showed a significant plant growth-promoting effect on seedling length, root length, fresh weight and dry weight of the cultivated rice (Oryza sativa). These findings fetched us to conclude that wild rice rhizospheric microorganism Pantoea agglomerans T21 could stimulate the growth of cultivated rice in vivo in poor soil.

scholarly journals Identification of phosphorus stress related proteins in the seedlings of Dongxiang wild rice (Oryza rufipogon Griff.) using label-free quantitative proteomic analysis

2020 ◽  
Author(s):  
Qianwen Deng ◽  
Liweidan Bai ◽  
Liangfang Dai ◽  
Yaling Chen ◽  
Jun Fang ◽  
...  
Keyword(s):  
Wild Rice ◽  
Expression Patterns ◽  
Resistance Mechanism ◽  
Oryza Rufipogon ◽  
Available Phosphorus ◽  
Label Free ◽  
Response Mechanism ◽  
Cultivated Rice ◽  
P Deficiency ◽  
Dongxiang Wild Rice

Abstract Background: The lack of available phosphorus (P) in soil is one of the important factors restricting rice growth. Previous studies indicated that Dongxiang wild rice (DXWR, O. rufipogon Griff.) was resistant to low-P stress. So far, the research of resistance mechanism in DXWR was very limited.Results: The results showed that 3589 significant differential accumulation proteins were identified between low P and the normal P treated root samples. 60 up-regulated and 15 down-regulated proteins were identified with ≥ 1.5-fold changes as an additional standard. Furthermore, among 75 significantly different expression proteins (SDEPs), 24 proteins also detected in previous transcriptome dataset verified by qRT-PCR, including OsPT2, OsPT8, OsPAP10c, OsPAP10a and OsPHF1. Through comprehensive analysis, it was found that DXWR could increase PAPs, membrane location of PTs, rhizosphere area, alternative splicing and decrease ROS activity to deal with low-P stress. Moreover, among the genes corresponding to 75 SDEPs, 7 uncharacterized genes were located in previous P related QTL intervals, of which two genes (LOC_Os12g09620 and LOC_Os03g40670) have been detected at both transcriptome and proteome levels. In addition, the expression patterns of OsPHR1, OsPHR2, OsPHO1 and NAT-OsPHO1 in DXWR were different in cultivated rice, suggesting that the response mechanism of some low-P tolerance in DXWR might be different from that in cultivated rice.Conclusions: This study screened out some candidate genes for low-P resistance and preliminarily verified that there might be a different low-P response mechanism in DXWR than in cultivated rice, which would provide insights in cloning the P-deficiency genes from wild rice, as well as elucidating the molecular mechanism of low-P resistance in DXWR.

scholarly journals Development and verification of SSR markers from drought stress-responsive miRNAs in common wild rice

2021 ◽  
Author(s):  
Yong Chen ◽  
Yuanwei Fan ◽  
Wanling Yang ◽  
Gumu Ding ◽  
Minmin Zhao ◽  
...  
Keyword(s):  
Drought Stress ◽  
Ssr Markers ◽  
Wild Rice ◽  
Oryza Rufipogon ◽  
Rice Varieties ◽  
Common Wild Rice ◽  
Oryza Rufipogon Griff ◽  
Rice Chromosomes ◽  
Ssr Loci ◽  
Dongxiang Wild Rice

PREMISE: Dongxiang wild rice (Oryza rufipogon Griff., DXWR) is the northernmost common wild rice found in the world, which possesses abundant elite genetic resources. We developed a set of drought stress-responsive microRNA (miRNA)-based single sequence repeat (SSR) markers for DXWR, which will help breed drought stress-resistant rice varieties. METHODS AND RESULTS: Ninety-nine SSR markers were developed from the drought stress-responsive miRNAs of DXWR. The SSR loci were distributed in all 12 rice chromosomes and most were in chromosomes 2 and 6, with di- and trinucleotides being the most abundant repeat motifs. Nine out of ten synthesized SSR markers were displayed high levels of genetic diversity in the genomes of DXWR and 41 modern rice varieties worldwide. The number of alleles per locus ranged from 2 to 6, and the observed and expected heterozygosity ranged from 0.000 to 0.024 and 0.461 to 0.738, respectively. CONCLUSIONS: These SSR markers developed from drought stress-responsive miRNAs in DXWR could be additional tools for elite genes mapping and useful for drought stress-resistant rice breeding.

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