A novel water-saving and drought-resistance rice variety promotes phosphorus absorption through root secreting organic acid compounds to stabilize yield under water-saving condition

2021 ◽  
pp. 127992
Author(s):  
Junguo Bi ◽  
Danping Hou ◽  
Xinaxian Zhang ◽  
Jinsong Tan ◽  
Qingyu Bi ◽  
...  
Keyword(s):  
Organic Acid ◽  
Drought Resistance ◽  
Rice Variety ◽  
Water Saving ◽  
Phosphorus Absorption

Drought-resistance rice variety with water-saving management reduces greenhouse gas emissions from paddies while maintaining rice yields

2021 ◽  
Vol 320 ◽  
pp. 107592
Author(s):  
Xianxian Zhang ◽  
Sheng Zhou ◽  
Junguo Bi ◽  
Huifeng Sun ◽  
Cong Wang ◽  
...  
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Drought Resistance ◽  
Rice Variety ◽  
Water Saving ◽  
Gas Emissions ◽  
Rice Yields

scholarly journals Molecular Breeding of a Novel PTGMS Line of WDR for Broad-Spectrum Resistance to Blast Using Pi9, Pi5, and Pi54 Genes

Rice ◽  
2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Yi Liu ◽  
Fenyun Zhang ◽  
Xingxing Luo ◽  
Deyan Kong ◽  
Anning Zhang ◽  
...  
Keyword(s):  
Male Sterility ◽  
Resistance Genes ◽  
Broad Spectrum ◽  
Drought Resistance ◽  
Blast Resistance ◽  
Water Saving ◽  
Rice Production ◽  
Molecular Techniques ◽  
Stress Factors ◽  
Line System

Abstract Background The two-line method based on the photoperiod and thermo-sensitive genic male sterile (PTGMS) lines is more cost-effective, simple, and efficient than the three-line system based on cytoplasmic male-sterility. Blast and drought are the most prevalent biotic and abiotic stress factors hampering rice production. Molecular techniques demonstrate higher efficacy in the pyramiding of disease resistance genes, providing green performance under the background of water-saving and drought-resistance rice. Results This study employed molecular marker-assisted selection, conventional hybridization, and high-intensity stress screening to integrate three broad-spectrum blast resistance genes Pi9, Pi5, and Pi54 into Huhan 1S. Subsequently, a novel water-saving and drought-resistance rice (WDR) PTGMS line Huhan 74S was developed. The drought resistance of the new PTGMS line Huhan 74S was comparable to that of Huhan 1S. Pathogenicity assays involving the inoculation of 14 blast prevalent isolates in the glasshouse showed that the blast resistance frequency of Huhan 74S was 85.7%. Further evaluation under natural blast epidemic field conditions showed that Huhan 74S and its hybrids were resistant to leaf and neck blast. The critical temperature point of fertility-sterility alteration of Huhan 74S was 23 °C daily mean temperature. The complete male sterility under natural growth conditions in 2017 at Shanghai lasted for 67 days. Also, both the agronomic and grain quality traits met the requirement for two-line hybrid rice production. Conclusion These results indicate that the newly bred PTGMS line Huhan 74S can be used to breed high-yielding, good-quality, disease-resistant two-line hybrid water-saving and drought-resistance rice (WDR), hence promoting sustainable rice production in China.

scholarly journals Drought Resistance in Rice from Conventional to Molecular Breeding: A Review

2019 ◽  
Vol 20 (14) ◽  
pp. 3519 ◽  
Author(s):  
Yusuff Oladosu ◽  
Mohd Y. Rafii ◽  
Chukwu Samuel ◽  
Arolu Fatai ◽  
Usman Magaji ◽  
...  
Keyword(s):  
Drought Resistance ◽  
Marker Assisted Selection ◽  
Developmental Stages ◽  
Rice Variety ◽  
Current Method ◽  
Plant Tolerance ◽  
Drought Tolerant ◽  
Drought Resistant ◽  
Adaptation Processes ◽  
Available Information

Drought is the leading threat to agricultural food production, especially in the cultivation of rice, a semi-aquatic plant. Drought tolerance is a complex quantitative trait with a complicated phenotype that affects different developmental stages in plants. The level of susceptibility or tolerance of rice to several drought conditions is coordinated by the action of different drought-responsive genes in relation with other stress components which stimulate signal transduction pathways. Interdisciplinary researchers have broken the complex mechanism of plant tolerance using various methods such as genetic engineering or marker-assisted selection to develop a new cultivar with improved drought resistance. The main objectives of this review were to highlight the current method of developing a durable drought-resistant rice variety through conventional breeding and the use of biotechnological tools and to comprehensively review the available information on drought-resistant genes, QTL analysis, gene transformation and marker-assisted selection. The response, indicators, causes, and adaptation processes to the drought stress were discussed in the review. Overall, this review provides a systemic glimpse of breeding methods from conventional to the latest innovation in molecular development of drought-tolerant rice variety. This information could serve as guidance for researchers and rice breeders.

scholarly journals Water Saving Irrigation in Rice Cultivation with Particular Reference to Alternate Wetting and Drying Method: An Overview

2010 ◽  
pp. 128-136
Author(s):  
MM Husain ◽  
M Shahe Alam ◽  
MH Kabir ◽  
AK Khan ◽  
MM Islam
Keyword(s):  
Weed Management ◽  
Low Cost ◽  
Water Productivity ◽  
Rice Variety ◽  
Water Saving ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Irrigation Practice ◽  
Weed Infestation ◽  
Irrigation Cost

In the context of global energy crisis and water scarcity, rice production system is undergoing changes with the strategy to produce more rice with lesser amount of water. Water saving technology has therefore, been developed and increasingly adopted to irrigate rice in different countries. Impact of alternate wetting and drying (AWD) irrigation as a water saving technique on rice yield, water productivity and environment has been overviewed in this paper. On-farm trials were conducted during the years 2007 and 2008 to validate the adaptability of AWD method of irrigation in Boro rice-variety BRRI dhan29. The trials were conducted at different locations of Gazipur, in which three farmers’ plots of rice were irrigated following AWD method, which were then compared with another 3 farmers’ plots of rice irrigated in conventional method maintaining 3-5 inches of standing water throughout. The trials have revealed that AWD method saved about 365 mm irrigation water (about 27%) over the conventional irrigation practice. However, there was no adverse effect of AWD- irrigation on grain yields of rice. AWD method as perceived by farmers, although reduced irrigation cost, resulted in more weed infestation and was associated with more weeding cost. Following the impressive results of the validation trials, the demonstrations were conducted in the farmers’ fields of different districts during boro 2009. In general, the demonstrations were successful to impress the farmers about AWD-irrigation as a water saving and low-cost irrigation method. However assurance of timely availability of irrigation is a precondition for farmers to adopt the technique and weed management using appropriate herbicides is necessary for adoption of the technology.

scholarly journals Combined proteomics, metabolomics and physiological analyses of rice growth and grain yield with heavy nitrogen application before and after drought

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Jie Du ◽  
Tianhua Shen ◽  
Qiangqiang Xiong ◽  
Changlan Zhu ◽  
Xiaosong Peng ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Resistance ◽  
Rice Variety ◽  
Soluble Sugar ◽  
Enrichment Analysis ◽  
Nitrogen Management ◽  
Nitrogen Regulation ◽  
Growth And Yield ◽  
Nitrogen Application ◽  
Heavy Nitrogen

Abstract Background Nitrogen application can effectively mitigate the damage to crop growth and yield caused by drought. However, the efficiency of heavy nitrogen application before drought (NBD) and heavy nitrogen application after drought (NAD) to regulate rice response to drought stress remains controversial. In this study, we profiled physiology, proteomics and metabolomics in rice variety Wufengyou 286 of two nitrogen management modes (NBD and NAD) to investigate their yield formation and the mechanism of nitrogen regulation for drought resistance. Results Results revealed that the yield of NBD and NAD decreased significantly when it was subjected to drought stress at the stage of young panicle differentiation, while the yield of NBD was 33.85 and 36.33% higher than that of NAD in 2017 and 2018, reaching significant levels. Under drought conditions, NBD increased chlorophyll content and net photosynthetic rate in leaves, significantly improved the activities of antioxidant enzymes such as superoxide dismutase (SOD), peroxidase and catalase, and decreased malondialdehyde (MDA) content compared with NAD. NBD promoted nitrogen assimilation in leaves, which was characterized by increased activities of nitrate reductase (NR) and glutamine synthetase (GS). In addition, NBD significantly increased the contents of osmotic regulatory substances such as soluble sugar, soluble protein and free proline. Gene ontology and KEGG enrichment analysis of 234 differentially expressed proteins and 518 differential metabolites showed that different nitrogen management induced strong changes in photosynthesis pathway, energy metabolism pathway, nitrogen metabolism and oxidation-reduction pathways. Conclusion Different nitrogen management methods have significant differences in drought resistance of rice. These results suggest that heavy nitrogen application before drought may be an important pathway to improve the yield and stress resistance of rice, and provide a new ecological perspective on nitrogen regulation in rice.

scholarly journals Molecular Breeding of a Novel PTGMS Line of Wdr for Broad-spectrum Resistance to Blast Using Pi9, Pikh, and Pi5 Genes

2021 ◽  
Author(s):  
Yi Liu ◽  
Fenyun Zhang ◽  
Xingxing Luo ◽  
Deyan Kong ◽  
Anning Zhang ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Resistance Genes ◽  
Broad Spectrum ◽  
Drought Resistance ◽  
Water Saving ◽  
Rice Production ◽  
Molecular Techniques ◽  
High Yield ◽  
Rice Quality ◽  
Hybrid Combination

Abstract Background: The two-line method based on the photoperiod and thermo-sensitive genic male sterile (PTGMS) lines is more cost-effective, simple, and efficient than the three-line system based on cytoplasmic male-sterility (CMS). Blast and drought are the most prevalent biotic and abiotic stress factors that hamper rice production, respectively. Molecular techniques demonstrate higher efficacy in the pyramiding of disease resistance genes, providing green performance under the background of water-saving and drought-resistance rice.Results: This work employed molecular marker-assisted selection (MAS), conventional hybridization and high-intensity stress screening to integrate the broad-spectrum blast resistance genes Pi9, Pikh, and Pi5 into Huhan 1S. Subsequently a novel water-saving and drought-resistance rice (WDR) PTGMS line Huhan 74S was developed. The drought resistance of the new PTGMS line Huhan 74S was comparable to that of Huhan 1S. The artificial inoculation of 14 blast strains revealed that the resistance frequency of Huhan 74S was 85.7%. Based on the conditions of natural field induction, Huhan 74S and its hybrid combination revealed satisfactory resistance to leaf and neck blast. The identification outcomes of photo-thermal characteristics showed that the critical point of Huhan 74S fertility conversion had an average daily temperature of 23℃, and the stable sterile period in Shanghai lasted 51 days. The rice quality of Huhan 74S was grade 3 based on standards issued by the ministry. Also, both the agronomic and rice quality performances adhered to the conditions of two-line hybrid rice production.Conclusion: The newly bred PTGMS line Huhan 74S demonstrated a stable and lasting resistance to blast. Moreover, the hybrid combination showed a high yield potential and can be used in the breeding of high-yield, high-quality, disease-resistance two-line hybrid water-saving and drought-resistance rice (WDR), hence promoting sustainable rice production in China.

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