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Analysis of China’s Rice Industry in 2023 and the Outlook for 2024 XU Chunchun, JI Long, CHEN Zhongdu, FANG Fuping China Rice    2024, 30 (2): 1-4.   DOI: 10.3969/j.issn.1006-8082.2024.02.001 Abstract （1508）   HTML （135）    PDF （545KB）（1089）       Knowledge map    Save In 2023, the total production of rice in China has been kept at over 200 million tons for 13 consecutive years with the area decreased slightly, and the yield has reached a new record high. The price of rice in the domestic market kept relatively strong, and the rice consumption is basically stable. Rice imports fell sharply and exports continued to decline. The quality level has been continuously improved, but the number of varieties approved decreased. The mode of operation has been continuously optimized, and the promotion of social services, green, efficient, light and simplified technologies and intelligent technologies has been accelerated. Facing problems of rice industry in China were analysed. It is projected that there is going to keep stable in rice area and the yield will increase slightly in 2024, and the rice market will run smoothly, the high-quality rice will develop rapidly. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Application of Herbicides in Rice Fields and Research Progress on Herbicide-resistant Rice Varieties Breeding HU Jiangbo, REN Zhengpeng, DING Xiang, WANG Chaoquan, FENG Yang, WANG Xiaojian, ZHANG Xiang, XU Nanfei China Rice    2023, 29 (4): 13-19.   DOI: 10.3969/j.issn.1006-8082.2023.04.003 Abstract （747）   HTML （225）    PDF （861KB）（955）       Knowledge map    Save Weeds are major reason affecting yield and quality in rice production, and herbicides are the most effective methods in weed control. In recent years, the type of herbicides available on the market has become numerous and varied, the use of commonly used herbicides has increased year by year. The problem of weed resistance caused by long-term and heavy use of single herbicide, as well as food safety and ecological environmental problems caused by herbicide residues, have become increasingly serious, making it difficultly to solve effectively. Developing herbicide-resistant rice varieties is a better choice. This article started with the occurrence and rules of weeds in rice fields, and introduced the control measures for weeds in two planting modes of direct seeding and transplanting, as well as the application status and challenges of commonly used herbicides in rice fields. Then, the paper focused on the latest research progress and application of new herbicide-resistant rice varieties, and looked forward to the development prospects of biotechnology in the creation of herbicide-resistant rice varieties. The aim is to provide a reference for improving the level of weed control in paddy fields, promoting research on herbicide-resistant rice variety breeding, and expanding the application of biotechnology. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Advance and Prospect of Rice Genetics and Breeding Research in 2020—2022 in China ZHAN Xiaodeng, WANG Kai, CAO Liyong China Rice    2023, 29 (6): 1-4.   DOI: 10.3969/j.issn.1006-8082.2023.06.001 Abstract （688）   HTML （96）    PDF （504KB）（910）       Knowledge map    Save The paper overall reviewed the research progress of genetic rule, varieties breeding, seed industries of rice in 2020—2022 in China, briefly comparied the research difference in China and abroad, prospected the research trend and direction. In terms of research on the evolution of rice varieties, it was found that high yield, plant morphological dominance, and resistant haplotypes resistant to biological stress are critical factors for extensive area planting of primary types of indica rice, while early maturity and resistant haplotypes resistant to abiotic stress are vital factors for vast area planting of primary varieties of japonica rice; The world's first redesigned and rapidly domesticated tetraploid rice were created, achieving a breakthrough of "from 0 to 1" and opening up a new direction for crop breeding; An intelligent rice breeding navigation program has been developed, with great potential for application in the rapid cultivation of new rice varieties; Many new breeding theories and methods have been innovated, and several new breeding techniques have been invented. Over the past three years, 6 177 varieties (sterile male lines) have been bred and approved, 61.4% of which were bred by enterprises. Reference | Related Articles | Metrics | Comments（0）

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Research Progress and Prospect of Slow and Controlled Release Fertilizer Application Technology in Rice WANG Yunxiang, XIAN Yunyu, ZHAO Can, WANG Weiling, HUO Zhongyang China Rice    2023, 29 (4): 20-26.   DOI: 10.3969/j.issn.1006-8082.2023.04.004 Abstract （406）   HTML （21）    PDF （878KB）（908）       Knowledge map    Save As a new type of fertilizer, slow and controlled release nitrogen fertilizer has been shown significant advantages in improving rice yield and nitrogen use efficiency and mitigating environmental pollution, taking into account both yield increase and environmental friendliness. On the basis of previous studies, the concept, classification and mechanism of different slow and controlled release nitrogen fertilizers, and the characteristics and effects of different fertilization techniques formed by them in rice production were summarized, such as one-time fertilization with slow-release nitrogen fertilizer, one-time base application mixed with fast-acting urea, different slow-and-controlled-release nitrogen fertilizers being mixed with each other and applied once, and the fertilization technology being applied in batches with fast-acting urea. The effects of different application technologies of slow and controlled-release nitrogen fertilizer on rice yield formation, as well on soil and atmospheric environment were introduced. The advantages of slow-release nitrogen fertilizers in rice production were clarified, and the problems existing in the application were further pointed out and relevant suggestions were put forward, so as to provide a certain reference for promoting the wide application of slow-release nitrogen fertilizers in rice production. Reference | Related Articles | Metrics | Comments（0）

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Research Progresses of Mechanized Rice Ratooning Technology for Improving Grain Yield and Quality YANG Desheng, HUANG Jianliang, PENG Shaobing China Rice    2023, 29 (5): 1-8.   DOI: 10.3969/j.issn.1006-8082.2023.05.001 Abstract （521）   HTML （254）    PDF （1034KB）（858）       Knowledge map    Save Rice ratooning is a resource-efficient and environmental-friendly rice planting system, which is of great significance for stabilizing the rice planting area and ensuring national food security. In recent years, the mechanized rice ratooning system has developed rapidly in China, with a planting area of over 1 million hm2 and an annual yield as high as 15 t/hm2. More importantly, there is a great potential to further expand the planting area of mechanized ratoon rice in China. However, the yield loss and reduction in milling quality in the ratoon crop due to rolling damage of stubble during the mechanical harvesting of the main crop remain the main constraints for the further expansion of mechanized ratoon rice. This paper introduced the characteristics of yield and quality formation in the mechanized rice ratooning system and summarized the research progresses of the cultivation techniques for yield and quality improvement. Policy intervention was suggested for the sustainable development of ratoon rice production in China. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Research Progresses on the Mechanism of Salinity and Drought Affecting Root Morpho-physiology and Yield Formation of Rice ZHU Wang, ZHANG Xubin, GENG Xiaoyu, CHEN Yinglong, DAI Qigen, ZHOU Guisheng, WEI Huanhe, MENG Tianyao China Rice    2023, 29 (3): 34-40.   DOI: 10.3969/j.issn.1006-8082.2023.03.006 Abstract （370）   HTML （23）    PDF （866KB）（820）       Knowledge map    Save At present, China is vigorously developing and utilizing coastal beaches to promote rice production. The rice production along the coastal beach is limited by freshwater resources and water conservancy infrastructure, which resulted in salinity-drought combined stress and seriously restricts the realization of the goal of a high and stable yield of rice in coastal beaches. The root system is the primary organ for plants to perceive salinity damage and drought stress, which is also the most important and direct damaged part. A comprehensive understanding of the effects of salinity damage, drought stress, and their combined stress on rice root morphology and physiology and their internal relationship with yield formation can provide scientific support for high-yield rice cultivation in coastal beaches. This paper summarized the effects of salinity damage, drought stress, and their combined stress on the morphological structure, physiological activity, and yield formation of rice roots, expounded the mechanism of their effects on rice root growth and yield formation from the aspects of osmotic regulation, ion balance, photosynthesis, antioxidant enzyme system, and endogenous hormones, and discussed the regulatory measures to alleviate rice salinity damage and drought stress. Finally, some suggestions were put forward for further research on the effects of salinity-drought combined stress on rice root growth and yield formation in the future. Reference | Related Articles | Metrics | Comments（0）

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Research Progress and Prospect in Molecular Biology of Rice in China in recent Years CUI Yuanjiang, LV Yang, HU Haitao, WU Shiqiang, GUO Longbiao China Rice    2023, 29 (6): 10-15.   DOI: 10.3969/j.issn.1006-8082.2023.06.003 Abstract （419）   HTML （30）    PDF （656KB）（748）       Knowledge map    Save The paper overall reviewed the research progress of rice molecular biology in 2020-2022 in China, briefly comparied the research difference in China and abroad, prospected the research trend and direction. In recent 3 years, a rice pangenome and genome navigation system, RiceNavi,has been developed for QTN polymerizationand breeding route optimization. The Oryza super pangenome with the largest population size in plantsand fully annotated genomes has been constructed. Several nitrogen efficient genes have been identified and their molecular mechanism of nitrogen efficiency has been dissected. Expression of some genes can significantly increase rice yield under experimental conditions. Significant progress has also been made in the mechanism research of rice broad-spectrum disease resistance, temperature response, and salt-alkali resistance. In gene editing, a new polynucleotide targeted deletion system AFIDs (APOBEC-Cas9 fusion induced deletion systems) has been established, successfully achieving accurate and predictable polynucleotide deletion in rice and wheat genomes. Using CRISPR/Cas9 technology,gene editing has produced many practical new materials. The rice apomixis material Fix2 (Fixation of hybrids 2) edited by a new gene increased the seed setting rate from 3.2% to 82%. The rice material knocked out the homologous gene GS3/AT1 can increase yield by about 22.4% in the field. Reference | Related Articles | Metrics | Comments（0）

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Analysis on the Characteristics of Approved Conventional Rice Varieties in Guangdong Province in the Past 40 Years PAN Yangyang, HUANG Daoqiang, WANG Chongrong, WANG Zhidong, LI Hong, ZHOU Degui, CHEN Yibo, ZHAO Lei, GONG Rong, ZHOU Shaochuan China Rice    2023, 29 (3): 74-73.   DOI: 10.3969/j.issn.1006-8082.2023.03.014 Abstract （323）   HTML （16）    PDF （605KB）（747）       Knowledge map    Save The conventional rice breeding has a glorious history in Guangdong province. In the past 40 years (1982-2021) in Guangdong province, 359 conventional rice varieties have been approved. In this study, the 40 years were divided into 8 periods, and the characteristics of the varieties in each period were statistically analyzed. The results showed that the yield improved from 5 313.0 kg/hm2 to 6 882.2 kg/hm2. The average plant height of rice increased gradually, the average effective panicle number decreased significantly, the panicle length and the filled grains per panicle increased significantly, while the seed-setting rate and 1 000-grain weight were not markedly changed. The amylose content decreased from 26.1% to 16.5%, the overall high-quality rate of the approved varieties reached 75.2%, and the high-quality rate of the approved varieties in the past three years (2019—2021) reached 85.2%, of which the first-grade high-quality rice accounted for 39.5%. The proportion of varieties with medial and above resistant to rice blast and bacterial blight was 85.8% and 44.0%, respectively. The parentage analysis shower that the approved 359 varieties are derived from 406 parents, of which 8 parents directly derive more than 10 rice varieties, 25 and 21 varieties were generated from Huangguangyouzhan and Wushansimiao, respectively. The 8 parents are all derived from Fengbazhan, an important backbone parent in the indica rice breeding in China. There were 55 varieties with a promotion area of more than 66,700 hm2, of which 12 varieties were more than 666,700 hm2. Huanghuazhan and Shuanggui 1 had a promotion area of more than 3,333,300 hm2. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Current Situation and Countermeasures of Rice Production in Hubei Province XUE Lian, DUAN Shengxing, ZHENG Xingfei, YIN Desuo, DONG Hualin, HU Jianlin, WANG Hongbo, ZHA Zhongping, GUO Ying, CAO Peng, XU Deze China Rice    2023, 29 (4): 45-47.   DOI: 10.3969/j.issn.1006-8082.2023.04.008 Abstract （379）   HTML （200）    PDF （416KB）（726）       Knowledge map    Save Rice is the most important cereal crop in Hubei Province. Steadily increasing rice production capacity to a new level is crucial to ensure the effective supply of grain products, strengthen the political responsibility of grain production, and better safeguard national food security. This study briefly expounded the present situation of rice production in Hubei Province, systematically analyzed the main problems at this stage, and put forward corresponding countermeasures and suggestions, so as to provide references for the sustainable and healthy development of rice production in Hubei Province. Reference | Related Articles | Metrics | Comments（0）

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Study on the Production Pattern and Fertilization Status of Rice Dominant Production Areas in China YAN Ruyu, GAN Guoyu, ZHAO Ximei, YIN Dacong, LI Yanli, JIN Huifang, ZHU Hai, LI Jifu China Rice    2023, 29 (3): 1-8.   DOI: 10.3969/j.issn.1006-8082.2023.03.001 Abstract （582）   HTML （419）    PDF （881KB）（705）       Knowledge map    Save In order to clarify the changes in the production pattern of China's rice dominant production areas and the current status of rice fertilization research, the publication, type, project distribution, research institutions, planting area, yield changes and fertilizer dosage of rice production and fertilization research in China were integrated and analyzed using the CNKI database, the China Rural Statistical Yearbook and the 2021 National Scientific Fertilization Guidelines as information sources. The results showed that, from 2011 to 2021, the rice planting area in China was in a state of dynamic equilibrium for the rest of the years, except for the fluctuations in 2017 and 2019, and the total rice yield and yield fluctuated to varying degrees and showed a trend of steady yield increase. The middle reaches of the Yangtze River Basin have the largest annual rice planting area and the highest annual yield; The rice yields were highest in the lower reaches of the Yangtze River Basin, with an average of 8 142.9 kg/hm2. Meta-analysis showed that optimizing rice fertilization mode, weight loss and efficiency improvement and improving cultivation technology were still the focus of national, social and academic attention. From 2013 to 2021, the number of published literature on rice yield and fertilization research in China has remained at more than 700 per year, reaching 922 in 2019, and the overall number of articles showed a downward trend after a slow rise. Among them, the middle reaches of the Yangtze River Basin has published the most relevant literature, accounting for 33.0% of the national literature; The types of published literature was mainly focus on technology application. Based on the data of rice yield and fertilization from 2011 to 2021, it is found that at the same rice yield level, there is still a certain difference between the amount of fertilizer applied in the dominant rice producing areas and the amount of fertilizer recommended by the state, among which the amount of potassium fertilizer applied in the lower reaches of the Yangtze River Basin and the amount of phosphorus and potassium fertilizer applied in the southeast coastal area have great potential for reduction, and the phenomenon of blind application of nitrogen, phosphorus and potassium fertilizers by some farmers in other main rice producing areas still exists. Therefore, each region should still apply chemical fertilizers scientifically and rationally according to local conditions. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Current Situation and Development Strategy of Japonica Rice Breeding in China LIU Wei, LI Shengnan, SONG Mengqiu, RUAN Shuang, HE Shuihua, XUE Wenxia, LI Hongbin, ZHANG Zhenyu China Rice    2023, 29 (4): 9-12.   DOI: 10.3969/j.issn.1006-8082.2023.04.002 Abstract （425）   HTML （221）    PDF （591KB）（695）       Knowledge map    Save Japonica rice is one of the main grain crops in China, and an important pillar of national food security, the perennial planting area of about 9 million hectares. Seeds are the “chips” of agriculture and the source of food. In recent years, japonica rice production in China has made great development in increasing grain production and increasing income and enriching grain rations. However, the current breeding level is still relatively lagging behind, mainly in the transition stage from 2.0 to 3.0, with long breeding cycle and low efficiency. The genetic diversity of germplasm resources is not enough and the genetic basis is relatively narrow. The problem of original technology being controlled by others is still widespread. Based on the thinking of various aspects of current japonica rice breeding and the main problems, the following breeding ideas were put forward in this paper: in-depth exploration of original functional genes, breakthrough of key core breeding techniques, creation of excellent new germplasm resources, development of major specific new varieties, in order to bring beneficial inspiration to the future japonica rice breeding work, help the revitalization of japonica rice industry, and stabilize the rice bowl in China. Reference | Related Articles | Metrics | Comments（0）

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On the Habitat, Representation and Inheritance of the Rice Culture of the Zhuangs WEI Liangjie China Rice    2023, 29 (4): 108-112.   DOI: 10.3969/j.issn.1006-8082.2023.04.022 Abstract （257）   HTML （11）    PDF （784KB）（693）       Knowledge map    Save The Zhuangs rice culture is an important component of the Chinese rice culture. The background of its formation is the unique natural, historical and cultural habitat of “Zamia”. There are many cultural features of Zhuangs rice farming, including the mythical narration of analyzing the source of rice, the various folk customs of rice production, the Zhuangs agricultural proverbs summarizing the experience of rice farming, and the special food with rice as the raw material. Zhuangs rice culture needs to be combined with intangible cultural heritage projects, networks, cultural and recreational activities in the horizontal direction, and also needs to excavate many connotations that are compatible with the new era in the vertical direction, so that it can be better inherited. Reference | Related Articles | Metrics | Comments（0）

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Advances and Prospects in Several Hot Research Areas of Rice Cultivation in 2020—2022 in China ZHU Junlin, CHU Guang, ZHANG Xiufu China Rice    2023, 29 (6): 5-9.   DOI: 10.3969/j.issn.1006-8082.2023.06.002 Abstract （593）   HTML （33）    PDF （643KB）（684）       Knowledge map    Save This article reviewed the research progress in the field of rice cultivation in China in 2020 to 2022. It covers several hot research areas, including unmanned smart cultivation of rice, high-quality and high-yield green cultivation of rice, mechanized cultivation of regenerative rice, diversified and multi-seasonal planting in rice fields, integrated ecological cultivation and breeding in rice paddies, as well as low-carbon emission rice cultivation, and discussed the research difference in China and abroad, provided an outlook on the future development of the discipline in China. In recent 3 years, unmanned aerial seeding technology, unmanned land preparation technology, precision unmanned machine planting technology, precision unmanned fertilization technology, and intelligent remote control irrigation technology have been developed. Several new green and high-yield cultivation modes, such as aerobic rice cultivation technology, rice deep-side fertilization technology, rice dense planting and reduced nitrogen cultivation technology, rice double-cropping and direct-seeding technology, have been proposed, which have eased the contradiction between high yield and high efficiency, high yield and high quality, and land use and soil conservation, and coordinated the relationship between environmental factors and high yield, high quality, and safety. The goal of reducing the use of pesticides and fertilizers, saving water, resisting drought, and producing high-quality and green crops has been achieved. In the field of regenerated rice technology, the mechanical harvesting and ratoon rice high-yield and efficient cultivation technology model and the “four prevention and one increase” high-yield and efficient cultivation technology system for ratoon rice system have been established. Cultivation techniques such as selecting varieties with low stubble for mechanical harvesting and high stubble for manual harvesting, timely early sowing, furrow irrigation, secondary field baking, repeated application of sprouting-promoting fertilizer, and appropriate stubble height have been proposed. A diversified and efficient planting mode has been constructed, forming a new situation of “hierarchical planting, diversified crop matching, and efficient land use.” In the main rice-growing areas, new ecological rice-farming models such as rice-prawn, rice-turtle, rice-eel, and rice-crab have been explored and developed based on local conditions, promoting traditional rice-fish farming to a new stage of “promoting rice farming with fishing, stabilizing grain production and increasing efficiency, ensuring quality and safety, and protecting the ecological environment.” Selecting high-yielding and low-emission rice varieties and developing multiple related cultivation technologies can effectively reduce CH4 emissions from paddy fields. Reference | Related Articles | Metrics | Comments（0）

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Research Progress on Phosphorus Solubilization Mechanism of Phosphorus Solubilizing Bacteria and Its Application in Rice Production PAN Lin, MI Chunxia, XU Qingshan, WEI Qianqian, KONG Yali, ZHU Lianfeng, TIAN Wenhao, ZHU ChunQuan, ZHANG Junhua China Rice    2024, 30 (3): 1-9.   DOI: 10.3969/j.issn.1006-8082.2024.03.001 Abstract （495）   HTML （43）    PDF （1147KB）（683）       Knowledge map    Save Phosphorus (P) is an indispensable element for plant growth. Although the total P content in soil is rich, the available P content, which can be directly absorbed and utilized by plants, is very low. Traditional methods to increase crop yield in phosphorus deficient is by applying P fertilizer. However, the phosphorus applied to the soil is not only easily to be fixed by soil, but also easily transformed into organic P that is difficult for plants to absorb directly, so as to reduce the P utilization rate by plants and cause environmental pollution. Phosphorus solubilizing bacteria can transform insoluble P in soil into available P that can be directly absorbed by plants, and improve the absorption and utilization rate of P by plants. The action mechanism of phosphorus solubilizing bacteria is complex, and existing various kinds of bacteria and existing many influencing factors. This paper mainly reviewed the research progress of phosphorus solubilizing mechanism of phosphorus solubilizing bacteria and summarized the application of phosphorus-solubating bacteria in rice production. It provided a theoretical basis for improving the utilization efficiency of insoluble phosphorus in paddy soil. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Research Progress on Effects of Nitrogen Fertilizer on Structure and Physicochemical Properties of Rice Starch WANG Yan, WANG Wang, CAI Jiaxin, ZENG Xin, NI Xinhua, TIAN Jie, TANG Chuang, JING Xiu, ZHOU Miao, WANG Jing, XU Hao, HU Yajie, XING Zhipeng, GUO Baowei, XU Ke, ZHANG Hongcheng China Rice    2023, 29 (4): 1-8.   DOI: 10.3969/j.issn.1006-8082.2023.04.001 Abstract （410）   HTML （252）    PDF （907KB）（682）       Knowledge map    Save As the main component of rice endosperm, starch is closely related to rice quality, especially cooking and eating quality. Reasonable application of nitrogen fertilizer can optimize the structure and physicochemical properties of rice starch and improve rice quality and taste. This article summarized previous research results on the effects of nitrogen fertilizer application rate and nitrogen fertilizer operation ratio on the physicochemical properties of rice starch, such as structure, particle morphology, particle size, crystallinity, degree of order, thermodynamic properties, and gelatinization properties, with a view to providing a theoretical basis for regulating the quality, yield, and efficiency of nitrogen fertilizer in rice from the perspective of starch properties. Reference | Related Articles | Metrics | Comments（0）

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Research Advances in High Temperature Stress on the Grain-filling and Quality of Rice and Its Mechanism WU Menyin, CAI Wei, ZHONG Xiaohan, YANG Jianchang, LIU Lijun, ZHANG Weiyang China Rice    2024, 30 (3): 10-17.   DOI: 10.3969/j.issn.1006-8082.2024.03.002 Abstract （527）   HTML （44）    PDF （948KB）（677）       Knowledge map    Save High temperature stress is the main environmental factor that threatens grain yield and quality of rice. This paper summarized the effects of high temperature stress on grain-filling and rice quality formation, and reviewed its biological mechanism from the aspects of assimilates accumulation and transport, activities of key enzyme involved carbon and nitrogen metabolism, endogenous hormones and molecular mechanism, and discussed the key technical measures to alleviate the high temperature damage on rice and considerable suggestions for future study. The review may provide insights for guiding cultivation and breeding of thermo-tolerance rice. Reference | Related Articles | Metrics | Comments（0）

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Advances in Studies on the Roles of Plant Hormones in Grain Filling, Grain Weight and Quality of Rice LIU Yang, XIAO Wenhui, CAI Wenlu, ZHANG Weiyang, WANG Zhiqin, XU Yunji China Rice    2023, 29 (3): 9-14.   DOI: 10.3969/j.issn.1006-8082.2023.03.002 Abstract （472）   HTML （181）    PDF （767KB）（665）       Knowledge map    Save Plant hormones are important regulators for plant growth and development, and play a crucial role in regulating grain filling, grain weight and quality of rice. This paper briefly introduced the characteristics of grain filling and weight increase of rice and its relations to rice quality, and mainly reviewed the advances in changing patterns of different plant hormones in grains, and their roles and regulatory mechanisms in grain filling, grain weight and quality, and also discussed the existing problems and future research area. The aim of this study was to provide theoretical basis for genetic improvement and cultivation regulation of rice with good quality and high yield. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Advance and Prospect in Regulation Mechanisms of Seed Dormancy and Germination of Rice in China in Recent Years TANG Simin, TONG Xiaohong, YING Jiezheng, ZHANG Jian, TIAN Zhihong, WANG Yifeng China Rice    2024, 30 (4): 1-6.   DOI: 10.3969/j.issn.1006-8082.2024.04.001 Abstract （702）   HTML （80）    PDF （669KB）（663）       Knowledge map    Save The dormancy and germination of rice seeds are important agronomic traits to maintain rice yield and quality. Before rice seed harvest, lower dormancy levels easily cause pre-harvest sprouting, resulting in reduced yield and quality. On the other hand, the high degree of dormancy usually leads to a low germination rate and the irregular emergence of rice seeds, which seriously restricts rice's high and stable yield. This paper overall reviewed the research progress of regulation mechanisms of rice seed dormancy and germination in 2020—2023 in China, specifically from the three areas, i.e., plant hormones (abscisic acid, gibberellin, jasmonic acid, auxin, brassinolide, and the cross talk between different hormones), abiotic stress (low temperature stress, salt stress, flooding stress, heavy metal stress, oxidative stress), and pre-harvest sprouting, briefly introduced the research progress abroad, prospected the research trend and direction, and thus aiming to clarify the genetic characteristics and mechanism of seed dormancy and germination, provide a theoretical basis and elite gene resources for the selection of rice varieties with suitable dormancy level. Reference | Related Articles | Metrics | Comments（0）

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Advances in Biological Control of Rice Diseases and Insect Pests ZHANG Xinxin, MING Ke, FENG Guozhong China Rice    2023, 29 (6): 16-20.   DOI: 10.3969/j.issn.1006-8082.2023.06.004 Abstract （477）   HTML （34）    PDF （667KB）（657）       Knowledge map    Save Biological control is a pollution-free, residue-free and safe control method for animals and humans. In order to meet the requirements of sustainable agricultural development and ensure the quality and safety of rice production, biological control is widely used in the control of rice diseases and insect pests. In this review, the definition of biological control is summarized, the research and application progress of biological control, such as pest natural enemy control, plant-derived pesticides, microbial agents and insect pheromones were reviewed, the existing problems and future research directions were prospected: making full use of biocontrol microbes to antagonize pathogens, giving full play to natural enemies of pests regulatory role, strengthening research and bio-pesticides product development and application. This review can provide the reference for further research and application of biological control of rice diseases and insect pests. Reference | Related Articles | Metrics | Comments（0）

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Research Progress of Lodging Characters and Lodging Resistance Pathways in Rice LIU Jiaxin, WU Zhouzhou, ZHOU Chanchan, A Na, LI Yimeng, WANG Shu China Rice    2023, 29 (6): 44-48.   DOI: 10.3969/j.issn.1006-8082.2023.06.009 Abstract （532）   HTML （39）    PDF （758KB）（645）       Knowledge map    Save Lodging is a common problem in rice production, which not only restricts the high and stable yield as well as fine quality of rice, but also reduces the efficiency of mechanized rice harvesting. This paper reviewed the lodging types of rice, the relationships of lodging with root morphology, culm morphology, culm anatomical structure and chemical composition. Furthermore, the lodging resistance pathways in rice were put forward from four aspects: breeding resistant varieties, optimizing cultivation methods, strengthening field management and applying chemical control technology, and finally the summary and prospects were made. Reference | Related Articles | Metrics | Comments（0）