Archive

20 November 2020, Volume 26 Issue 6 Previous Issue    Next Issue

---

For Selected:

Download Citations EndNote Ris BibTeX

Toggle Thumbnails

Select

Nutritional and Functional Characteristics of Rice Grain 2020, 26(6): 1-11.  DOI: 10.3969/j.issn.1006-8082.2020.06.001 Abstract ( )   PDF (1411KB) ( )   Rice grain contains many kinds of nutritional and functional components. Starch and protein are the main compounds found in the endosperm, and many functional compounds are present in the bran part. This study summarized the contents and health effects of nutritional （carbohydrates, protein and amino acids, fat and fatty acids, dietary fiber, vitamins and minerals） and functional compositions （γ-oryzanol, polyphenols, γ-amino butyric acid and phytic acid） of rice grain. The current progresses on the fortification of nutritional and functional compounds and the health benefits of the whole rice grain were reviewed, and the problems and challenges in the research and development of functional whole rice grain products were also prospected.

Select

The Modern Rice Culture 2020, 26(6): 12-15.  DOI: 10.3969/j.issn.1006-8082.2020.06.002 Abstract ( )   PDF (774KB) ( )   Based on the current development and transforming of rice culture, the types of rice food culture, the important characteristics and key points of food culture in different areas and different cutural backgrounds are analyzed and elaborated. At the same time, the future rice food culture is prospected.

Select

Analysis on Characteristics of Rice Varieties Registered in China in 2019 2020, 26(6): 16-22.  DOI: 10.3969/j.issn.1006-8082.2020.06.003 Abstract ( )   PDF (674KB) ( )   The basic characteristics of rice varieties approved at national and provincial level in China in 2019 are analyzed. In 2019, there were 1,372 rice varieties were registered by Crop Variety Approval Committee in China in 2019 （372 varieties registered national level）, including 69 conventional indica rice, 420 two lines indica hybrid rice, 528 three lines indica hybrid rice, 226 conventional japonica rice, 16 japonica hybrid rice, 12 indica-japonica hybrid rice and 45 sterile lines. Compared with 2018, the proportion of approved indica hybrid rice varieties increased, while the proportions of conventional indica rice, japonica hybrid rice and japonica hybrid rice declined. For the main organization of variety breeding，80.29% of the varieties approved by enterprises in 2019, the technological innovation system of the seed industry with enterprises as the main body has been formed. Average yield of conventional indica rice, two lines indica hybrid rice, three lines indica hybrid rice, conventional japonica rice and japonica hybrid rice were 491.41, 603.48, 574.46, 603.89 and 649.20 kg/667 m2, respectively, compared with 2018, the yield of two lines indica hybrid rice and japonica hybrid rice increased, while the yield of conventional indica rice, three lines indica hybrid rice and conventional japonica rice decreased. The high-quality compliance rate of rice varieties approved in 2019 was 53.95%, and a decreased compared with 2018. Among them, the high-quality compliance rate of indica rice varieties was 54.97% and japonica rice varieties was 50.00%, the high-quality compliance rate of hybrid rice was 54.88% and conventional rice was 50.85%, the high-quality compliance rate of indica rice surpassed that of japonica rice and hybrid rice surpassed conventional rice for the first time. The comprehensive resistance performance of the varieties approved in 2019 is still not good. Among the 372 nationally approved varieties, only 19.62% of the varieties are moderately resistant or resistant to rice blast, but some provinces have good resistance varieties. For example, Guangdong has excellent resistance varieties to rice blast, and Yunnan has good resistance varieties to bacterial blight.

Select

Talking about the Basic Points of Crop Breeding 2020, 26(6): 23-26.  DOI: 10.3969/j.issn.1006-8082.2020.06.004 Abstract ( )   PDF (544KB) ( )   This article summarizes the key components of crop breeding and summarizes them into “one ultimate goal, two parent lines, three categories of breeding technologies, four basic concepts, five levels of new variety evaluation, six breeding methods and seven stages of breeding history”. Having mastered the above “1, 2, 3, 4, 5, 6, 7” about crop breeding, crop breeding has a clear idea and a strong theoretical foundation, and would surely achieve good results in breeding practice.

Select

Research Progress on Regulation Technology of Cadmium Accumulation in Rice 2020, 26(6): 27-31.  DOI: 10.3969/j.issn.1006-8082.2020.06.005 Abstract ( )   PDF (703KB) ( )   Cadmium is a heavy metal with strong biological toxicity. The excess of cadmium in soil not only affects the growth and development of rice, but also enters human body through the food chain, which could cause great harm to the health of people. In this paper, the main technical measures and their effects of regulation and control of cadmium accumulation in rice were summarized, including the selection of rice varieties resistant to cadmium accumulation, soil remediation and agronomic measures. The direction and suggestions for the future research on low cadmium accumulation in rice were discussed from the aspects of variety improvement, soil remediation and agronomic methods, so as to provide some references for the prevention and control of cadmium pollution in rice fields.

Select

Effects of Water Deficit on Rice Seedling Quality and Its Regulation 2020, 26(6): 32-36.  DOI: 10.3969/j.issn.1006-8082.2020.06.006 Abstract ( )   PDF (556KB) ( )   In order to clarify the effects of water management on quality of rice seedling, using Huanghuazhan, IR36, Zhongzheyou 1, Tianyouhuazhan, Yongyou 538 and Zheyou 18 as materials, PEG6000 was used to simulate the water deficit, and the water content of the substrate was controlled in the process of seedling raising. The results showed that, the compensation effect caused by light drought could improve the seedling quality by increasing the plant height and leaf area, enhancing the root characteristics of seedlings, and increasing the dry matter accumulation; moderate and severe water stress could decrease the plant height and leaf area, weaken the root characteristics of seedlings, and inhibit dry matter accumulation. The test results also showed that when the soil water potential is - 60 kpa, the effect of improving the seedling quality is the test.

Select

Discussion on the Method of Quickly Breaking the Dormancy of the Seeds of Early Rice Restorer Line 2020, 26(6): 37-39.  DOI: 10.3969/j.issn.1006-8082.2020.06.007 Abstract ( )   PDF (380KB) ( )   In order to study the optimum methods of breaking the seeds dormancy, the seeds of early maturity restorer line R6307 and conventional early indica rice variety Zhongzao 22 harvested in spring, summer and autumn were treated by soaking seeds with hydrogen peroxide, strong chlorine, gibberellin, potassium nitrate and other agents, as well as high temperature drying and low temperature refrigeration. The results showed that the two methods of strong chlorine and high temperature drying could effectively break the dormancy of the seeds of rice early maturing restorer line seeds at different harvesting stages, and improve the seedling rate of seeds.

Select

Effects of Carbon and Nitrogen Resource Addition on Greenhouse Gas Emission in Acidified Paddy Soils 2020, 26(6): 40-45.  DOI: 10.3969/j.issn.1006-8082.2020.06.008 Abstract ( )   PDF (673KB) ( )   A acidified paddy soil was used to incubated with ammonium sulfate along or ammonium sulfate together with glucose, the results showed that addition of ammonium sulfate significantly accelerated the soil acidification, increased the transformation of NH4+ to NO3- at 2 d of incubation, and these differences was more significant after a long-term （120 days） incubation. Ammonium sulfate significantly caused the release of NO and N2O, and exogenous glucose further promoted the release of the two greenhouse gases. There was a significant correlation among the release of two greenhouse gases and ammonia oxidizing bacteria, ammonia oxidizing archaea and denitrifying bacteria. In the short-term incubation （2 days）, the different abundance of ammonia oxidizing bacteria and denitrifying bacteria led to the higher greenhouse gas emission from the simultaneous addition of ammonium sulfate and glucose treatments than the simple ammonium sulfate treatment; in the long-term incubation（120 days）, ammonia oxidizing bacteria, ammonia oxidizing archaea and denitrifying bacteria led to this difference.

Select

Cadmium Accumulate Rule in Rice Grain for Early Matured Hybrid Rice Under Different Cultivation Methods 2020, 26(6): 46-48.  DOI: 10.3969/j.issn.1006-8082.2020.06.009 Abstract ( )   PDF (363KB) ( )   The cadmium accumulate rule in grain of different rice varieties under different cultivation methods were studied. The results showed that, the soil cadmium content of the three test points were 0.188 mg/kg, 0.749 mg/kg, 1.420 mg/kg, and the pH values were 6.41, 5.80, and 7.29, respectively; the average cadmium content in grain under the transplanting mode of the three experimental sites were 0.093 mg/kg, 0.944 mg/kg, and 2.494 mg/kg, respectively, and the average cadmium content in grain under the direct seeding mode was 0.071 mg/kg, 0.434 mg/kg, and 0.243 mg/kg, respectively. It can be seen that the soil cadmium content has a decisive effect on the cadmium content of rice, and the soil pH value has a significant impact on the cadmium adsorption of rice; different early-maturing varieties also have significant differences in the absorption of cadmium in the soil . Therefore, in cadmium-contaminated areas, direct seeding cultivation, proper improvement and adjustment of soil pH, and selection of low-cadmium adsorption varieties are simple, practical and reliable important means to reduce cadmium pollution and ensure food safety.

Select

Genotyping of 10 Grain Shape Genes in Seven Long-grain Japonica Rice Varieties by Molecular Marker 2020, 26(6): 49-54.  DOI: 10.3969/j.issn.1006-8082.2020.06.010 Abstract ( )   PDF (790KB) ( )   Seven representative long-grain japonica rice varieties were selected as test materials, and short-grain japonica rice varieties Nipponbare was used as control. Seven grain length-related genes including GS3, LGY3, qGL3, GL7, SLG7, TGW6 and GS9, and three grain width-related genes including GW8, GW5 and GS5 were tested by molecular marker. The results showed that, seven long-grain japonica varieties all have the gs3 long-grain allele, Exiang 2, CLG-YZ, CLG-HZ, CLG-HB, CLG-JX have the GL7 and SLG7 long-grain alleles, Daohuaxiang 2 has the lgy3 long-grain allele, CLG-HZ has the GW5 wide-grain gene, and Exiang 2 has the GW8 wide-grain allele. This study not only has a more comprehensive understanding of the genotype of existing long-grain japonica varieties, but also provides important genotype information in selecting and cultivating new long-grain japonica varieties via molecular marker-assisted selection in future.

Select

Model Optimization for Determination of Amylose, Protein, Fat and Moisture Content in Rice by Near-infrared Spectroscopy 2020, 26(6): 55-59.  DOI: 10.3969/j.issn.1006-8082.2020.06.011 Abstract ( )   PDF (761KB) ( )   Amylose, protein, fat and moisture content are important factors of rice nutritional and storage quality. However, the mostly used method for determination of these indexes is the National Standards, which is tedious and cannot detect multiple indexes simultaneously. Herein, 126 samples of japonica, glutinous and indica rice from Jiangsu province were taken as modeling samples. After the selection of spectral pretreatment and optimal spectral range, the partial least square （PLS） models of rice amylose, protein, fat and moisture content were established by combining near-infrared spectroscopy and chemometrics. For the detection of fat and amylose models, savitzky-golay filter spectral pretreatment method was better, rc was 0.8110 and 0.6671, respectively; protein model was pretreated with standard normal variation, rc was 0.9713; the spectra were processed by first derivative spectral pretreatment method for moisture content, rc was 0.9663. Furthermore, optimized models were evaluated with prediction sets after selection of wavelength. For amylose, protein, fat and moisture content, the correlation coefficient of prediction set were 0.8030, 0.9429, 0.8331 and 0.9421. Accordingly, near infrared spectroscopy could achieve the simultaneous, rapid and nondestructive detection of amylose, protein, fat and moisture content in rice.

Select

Scientific and Technological Progress and Functional Effect Analysis of Yield Factors of Main Late Japonica Rice Cultivars in Jiaxing 2020, 26(6): 60-63.  DOI: 10.3969/j.issn.1006-8082.2020.06.012 Abstract ( )   PDF (394KB) ( )   The effects of 7 yield factors on 12 main cultivars were analyzed by using C-D production function model. The results showed that the absolute value of elasticity coefficient affecting yield was 1 000-grain weight > total grain number per panicle > effective panicles > plant height > maximum tillers > seed setting rate > full heading stage. Among the elasticity coefficients, 0

Select

Rice Grain Yield and Quality Characteristics under Flooded Organic Cultivation Mode 2020, 26(6): 64-66.  DOI: 10.3969/j.issn.1006-8082.2020.06.013 Abstract ( )   PDF (408KB) ( )   The organic cultivation mode of flooded rice is organically integrated with key technical links such as “fermented soil fertility”, “deep water suppression of grass”, “flowing water flooding to control pests and diseases”, which can realize high-yield and high-efficiency cultivation of rice under zero use of pesticides and fertilizers. In this study, Jia 58 was used as the test material and two modes of flooded organic cultivation and conventional cultivation management were set up to compare the differences of rice stem and tillering dynamics, yield and composition, rice appearance, processing, cooking and nutritional quality under the two modes. The results showed that the yield under flooded organic cultivation mode was 572 kg/667 m2, which was lower than that of conventional cultivation management mode, and the difference was not significant. The number of panicles and the number of grains per panicle under the flooded organic cultivation mode were higher than those of the conventional cultivation management mode, and the seed setting rate and 1 000-grain weight were lower than those of the conventional cultivation management mode. Compared with the conventional cultivation and management mode, the number of stems and tillers in the jointing, heading and maturity stages of the rice population under the flooded organic cultivation mode was higher; the rate of stem and tiller formation also shows a similar trend. Compared with the conventional cultivation and management mode, the rice chalky grain rate, chalky size, chalkiness, brown rice rate, polished rice rate and whole polished rice rate are lower, but the difference is not significantly; the rice amylose content and gel consistency are significantly higher than those of the conventional cultivation management mode, and the protein content is significantly lower than the conventional cultivation management mode. This article discusses the practical effects of flooded organic cultivation mode in production, and provides theoretical and practical reference for the demonstration and promotion of flooded organic cultivation mode in suitable areas in southern Jiangsu.

Select

Risk Assessment Model of Low Temperature Chilling Injury for Double-cropping Late Rice in Quzhou City 2020, 26(6): 67-70.  DOI: 10.3969/j.issn.1006-8082.2020.06.014 Abstract ( )   PDF (541KB) ( )   In order to grasp the occurrence regularity of low temperature chilling injury in double-cropping late rice in Quzhou city, based on the daily meteorological data from 1951—2018 in Quzhou city, starting with meteorological factors, using principal component analysis to find two principal components and establishing an index evaluation model; the clustering segmentation method was used to rank the indices. The statistical results showed that the frequency of low-temperature chilling damage in the autumn of double-cropping late rice from 1951 to 2018 occurred once in two years, the strongest in the 1950s, and the lightest in the 1960s; there were mostly mild disasters in the 1980s and 2000s; the damage intensity was weak in the 1990s and 2010s. In 1953, 1970 and 1973, low temperature chilling damage was more serious. The climate of the double-cropping late rice with severe cold damage is also obviously abnormal, and it is related to the decrease of the yield of double-cropping late rice. The more severe autumn low temperature and cold damage shows a significant decrease in production. In the years with severe cold damage in autumn, the double-cropping late rice has significantly reduced yield. It is feasible to evaluate low temperature chilling damage of double cropping late rice at the heading stage in Quzhou using principal component analysis and index evaluation analysis method.

Select

Thoughts on Promoting the Green and high-quality Development of Rice Industry in Jiangsu Province 2020, 26(6): 71-75.  DOI: 10.3969/j.issn.1006-8082.2020.06.015 Abstract ( )   PDF (750KB) ( )   Rice is the largest grain crop in Jiangsu province, with planting area and total output accounted for 40% and 60% of the total grain crop, which is of great significance to ensure the grain security in Jiangsu province. Under the new situation, the development of Jiangsu rice industry faces many problems, such as insufficient green technology reserve, increasing pressure of resources and environment, increasing planting cost and lagging industrial competiveness. Based on the analysis of the current situation and existing problems of Jiangsu’s rice industry, the authors suggested that, to promote the green and high-quality development of Jiangsu’s rice industry, it should accelerate the improvement and innovation of green policies, strengthen the cultivation and promotion of green high-quality varieties, strengthen the integration and promotion of green high-yield and high-efficiency technologies, accelerate the development of green production and service providers, and promote the multi-functional development of rice production.

Select

Development and Countermeasures of Rice Industry in Zhejiang Province 2020, 26(6): 76-78.  DOI: 10.3969/j.issn.1006-8082.2020.06.016 Abstract ( )   PDF (458KB) ( )   In recent years, Zhejiang province has taken a number of measures to promote the green development of rice industry, improve quality and efficiency, and further stabilize the grain production. By analyzing the situation of rice production, storage, transportation, processing and sales, and the development of grain demand in Zhejiang province, this paper summarizes the measures for the development of rice industrialization, points out the problems existing in the process of industrialization development, and puts forward relevant countermeasures and suggestions.

Select

Production Characteristics of Rice in USA and its Enlightenment to China—— Taking Louisiana as an Example 2020, 26(6): 79-81.  DOI: 10.3969/j.issn.1006-8082.2020.06.017 Abstract ( )   PDF (442KB) ( )   The United States is a major rice exporter, with scientific research capabilities and production levels among the top in the world. The paper focuses on the situation of scientific research and production of rice in the United States, especially in Louisiana, in order to provide some references and guidance for China. The area of rice in Louisiana ranks, the third in the United States, was 172 000 hm2. The types of cultivated rice are long grain rice, medium grain rice and specialty rice, long grain rice occupied for 89% of the area. The yield of rice is 7.15 t/hm2, and the production is 1 197 800 t in 2019. Cultivation techniques are advanced, clear-field technology and mechanized planting technology are popularized in Louisiana. High - throughput molecular marker - assisted selection technology has been applied to rice research deeply.

Select

Detailed Rules for Field Purity Identification of Variety in Rice Regional Test 2020, 26(6): 82-84.  DOI: 10.3969/j.issn.1006-8082.2020.06.018 Abstract ( )   PDF (439KB) ( )   The field purity identification of rice varieties in regional trials is still one of the reliable methods to determine the purity of new varieties. In this paper, the cultivation conditions, planting requirements and precautions, suitable identification period, identification principles, common abnormal plants types, main characters and identification standards of rice varieties in regional trial were summarized.

Select

Popularization and Application Innovation of New Rice Varieties Taking Jingliangyou 1212 as a Case 2020, 26(6): 85-87.  DOI: 10.3969/j.issn.1006-8082.2020.06.019 Abstract ( )   PDF (443KB) ( )   Jingliangyou 1212 is a green super hybrid rice selected by Yuan Longping Agricultural High-tech Co. Ltd. It has the characteristics of moderate growth period, good agronomic characters, fertilizer and lodging resistence, high yield and excellent rice quality. It has been approved by the State and Hubei province, and popularied by the Zhongxiang Agricultural Marketing Team of Hunan Yahua Seed Industry Co. Ltd. in 2016. The team takes “technology + service + marketing” as its promotion concept. Through technological innovation, cultivation technical services, planting production and marketing docking, information transformation and other innovative promotion models, as of 2019, the promotion area of Jingliangyou 1212 reached 200,000 hectares.

Select

“Perennial Rice-Fish-Duck” Integrated Breeding Techniques in Guizhou 2020, 26(6): 88-90.  DOI: 10.3969/j.issn.1006-8082.2020.06.020 Abstract ( )   PDF (468KB) ( )   Perennial rice technology consists of perennial rice varieties developed by utilizing the rhizome trait of the wild rice species, Oryza longistaminata, and the related crops management techniques. The technique enables us to plant rice only once but consecutive harvest for 5 to 10 years, during which there is no need for several production processes, such as purchasing seeds, seedling nursery, plowing fields and transplanting. The technique represents an efficient and sustainable rice production strategy, which is characterized by its environment-friendliness, cost saving and increasing effectiveness. In order to localized the technique in Guizhou, perennial rice varieties were introduced since 2017 and which were applied in rice-fish-duck system by 3 years of study, combined complementary advantages of high resistance of perennial rice and ecological regulation in paddy field, established a set of “perennial rice-fish-duck” light and efficient comprehensive cultivation technology without pesticide and less chemical fertilizer.

Select

Effects of Fertilizer Regulation on Diseases, Pests, Yields and Economic Benefits of Double Cropping Rice 2020, 26(6): 91-95.  DOI: 10.3969/j.issn.1006-8082.2020.06.021 Abstract ( )   PDF (525KB) ( )   The effects of fertilizer regulation technique （FRT） for diseases and pests control on double cropping rice was tested by field experiments in Wenling city of Zhejiang province, using the rice varieties Zhongzao 39 and Yongyou 538 as materials. Compared with the traditional fertilization habit of the local area, the improvements of FRT include postponing nitrogen application, reducing the application proportion of base tillering fertilizer, increasing the application proportion of panicle and spikelet fertilizer, and optimizing the fertilizer nutrient ratio of nitrogen, phosphorus and potassium as well. The results showed that compared to the conventional fertilizer treatment, the occurrence and damage degree of the main rice diseases and insect pests, including striped stem borer, rice leaf folder, planthoppers and sheath blight as well, were obviously reduced in the rice field taking FRT, and the abundance of natural enemies were increased significantly. Compared to the control of the early season rice and late season rice, the damage degree of rice plant by striped stem borer were decreased by 53.19% and 45.90%, the larva density of striped stem borer were reduced 74.75% and 16.02%, respectively; the leaf folded rates by leaffolder were decreased by 22.28% and 73.17%, the larva density of leaffolder were reduced by 24.82% and 95.28%, respectively; the density of planthoppers were decreased by 43.52% and 88.76%, respectively. Meanwhile, the population ratios of spiders to planthoppers were increased by 52.11% and 25.93%, the density of predatory bugs were increased by 4.14 times and 6.59 times, respectively. The incidence rates of rice sheath blight were decreased by 62.90% in late season rice. The grain number per panicle, the 1 000-grain weight and the ability of lodging resistance of the rice field taking FRT were observably increased. Compared to the control, the yield and the income of the early rice taking FRT were increased by 15.60% and 168.71 yuan/667 m2. Similarly, the yield and the income of late rice taking FRT were increased by 38.73% and 440.53 yuan/667 m2. This experiment proved that the FRT could not only effectively reduce the occurrence and damage of the main rice diseases and pests, but also increase the abundance of natural enemies, as well as increase production and income. It has excellent potential for application on the double cropping rice area.

Select

Effects of Sowing Date and Filling Stage Temperature on Nutritional Quality and Taste Quality of Liaogeng 433 2020, 26(6): 96-99.  DOI: 10.3969/j.issn.1006-8082.2020.06.022 Abstract ( )   PDF (432KB) ( )   The effects of sowing date and filling stage temperature on nutritional quality and taste quality of Liaogeng 433 were studied in the trial. The results showed that the sowing date significantly affected nutritional quality and taste quality of Liaogeng 433. With the delay of the sowing date, the brown rice rate, polished rice rate, whole rice rate, amylose content, protein content and mineral content（Mg, P, K, and Ca） decreased, and the chalky grain rate increased. The most suitable temperature of Liaogeng 433 during filling period is between 22℃~25℃. Compared with 25℃, the temperature during filling period increased by 3℃ and the taste value decreased by 8.75%, and when the temperature decreased by 6℃, the taste value decreased by 13.99%. With the delay of the sowing date, the grains are more sensitive to the temperature in the filling period. Compared with the A1B2 treatment （sowing on April 9th, the temperature of the filling period is 25℃）, the taste value of A4B4 treatment （the sowing on April 30, the temperature of the filling period is 19℃） decreased by 23.49%. It shows that Liaogeng 433 is a late-maturing and temperature-sensitive variety.

Select

Effects of Different Sowing Dates on The Yield and Grain Quality of Yuzhenxiang 2020, 26(6): 100-103.  DOI: 10.3969/j.issn.1006-8082.2020.06.023 Abstract ( )   PDF (663KB) ( )   A good-quality rice variety, Yuzhenxiang, which was the major variety of Helonggong Rice, was used as material to study the effects of six different sowing dates on the growth and development, yield composition and grain quality. The results showed that the sowing date has a significant effect on the seedling quality, growth period, yield composition and grain quality. With the delay of sowing date, the air temperature in the first and middle period of growth was increased, the growth speed of plants was accelerated and the growth period was shortened, the daily average temperature during the filling period was gradually decreased, which resulting in slowing down the filling speed and prolonging the duration of grain-filling stage. In the performance of grain quality, the whole milled rice rate and appearance quality of Yuzhenxiang were improved with the delay of sowing date. Based on comprehensive analysis of the yield, quality and resistance of Yuzhenxiang affected by different sowing dates, the treatment III , which is sowing on May 18, had the highest yield and better quality and resistance.

Select

Breeding and Application of High Quality Long Grain Rice Wankengeng 11036 2020, 26(6): 104-106.  DOI: 10.3969/j.issn.1006-8082.2020.06.024 Abstract ( )   PDF (466KB) ( )   With the development of society and economy, people's consumption level has gradually improved, and it has changed from quantity type to quality type. It is necessary to cultivate high quality long grain nutritional rice varieties to meet the needs of improving people's quality of life. In this study, long grain genes and aroma genes are mainly transferred into high quality and high yield rice varieties by biological technology, thus forming a new generation of high quality long grain varieties with fragrance. Wankengeng 11036 is a new early-maturing late japonica variety bred by Jiangsu （Wujin） Rice Research Institute on the basis of high quality original intermediate materials. It has the characteristics of high quality, high yield, stable yield and disease resistance. It was approved by Anhui Provincial Crop Variety Appraisal Committee in 2018.

Select

Breeding and Utilization of a New Late Indica Rice Variety Hongxiangzhan with Good Eating Quality 2020, 26(6): 107-108.  DOI: 10.3969/j.issn.1006-8082.2020.06.025 Abstract ( )   PDF (239KB) ( )   Hongxiangzhan is a high-quality conventional rice variety developed by Jiangxi Hongya Seed Co. Ltd. It is bred from descent of Meixiangzhan/HY521-4 by using genealogy breeding method. Hongxiangzhan was approved by Jiangxi Crop Variety Appraisal Committee in March 2019. This paper introduced the breeding process, characteristics, cultivation and seed production techniques of Hongxiangzhan.

Select

Screening of Rice Varieties Suitable for Saline-alkali Land Planting in Toketo County, Inner Mongolia 2020, 26(6): 109-111.  DOI: 10.3969/j.issn.1006-8082.2020.06.026 Abstract ( )   PDF (494KB) ( )   The salt content of the local irrigation water in Toketo County, Inner Mongolia has been maintained at a level of 3.0 ‰ to 5.5 ‰ all year round, which seriously affects the growth and development of rice. In order to promote the development of the local rice industry, a screening experiment of saline-alkali-tolerant rice varieties was carried out for the local saline-alkali water and soil environment. The results showed that, there were significant differences in the survival rates of the 11 tested varieties with the transplanting time. 30 days after transplanting, the survival rates of Jigeng 113, Jigeng 301 and Jigeng 515 decreased below 50%, while Songgeng 9, Gengyou 315, S7 and Gengyou 653 remained above 90%, showing strong salt tolerance. The seedling rate of hybrid rice varieties is much higher than conventional rice varieties. The plant height of the tested varieties is lower than that of the variety grown under normal environment. Except the panicle length of Songgeng 9 and Gengyou 653 were close to normal value, the other varieties showed significant inhibition. In the experiment, the yields of Songgeng 9 and Gengyou 653 are outstanding, which could be used as the recommended varieties planting in local and similar ecological areas.

Select

Breeding and Cultivation Techniques of New Japonica Rice Variety Tongyuan 331 2020, 26(6): 112-113.  DOI: 10.3969/j.issn.1006-8082.2020.06.027 Abstract ( )   PDF (249KB) ( )   Tongyuan 331 is a conventional japonica rice variety bred by Tonghua Academy of Agricultural Sciences with Tong 35 as the female parent and Tong 06-88 as the male parent. It has the characteristics of high and stable yield, high seed setting rate and wide adaptability. It was approved by Jilin Province Crop Variety Approved Committee in 2017. This article summarizes the selection and breeding of Tongyuan 331, as well as its planting performance in regional test, production test and large-scale demonstrations in Jiling province, and summarizes its high-yield cultivation techniques.

Select

Current Situation, Problems and Countermeasures of High Quality Rice Industry in Changzhou City 2020, 26(6): 114-116.  DOI: 10.3969/j.issn.1006-8082.2020.06.028 Abstract ( )   PDF (452KB) ( )   In recent years, the rice production in Changzhou city has accelerated the transformation of development mode, vigorously promoted the adjustment of planting structure, the development of high quality rice industry has been paid high attention. It has made remarkable achievements in breed selection and promotion, scientific and technological development, professional services, industrial management and brand establishment. However, it’s also faced with many challenges, such as the lack of high quality varieties with local characteristics, the lack of high quality rice layout, the lack of scale production benefits and the insufficient integration of rice brand. In order to promote the Changzhou rice production from the direction of increasing yield to the direction of improving quality, continuously improve the quality efficiency and competitiveness of high quality rice, promote agricultural efficiency, increase farmers' income and rural green, the author comes up with five countermeasures and suggestions to promote the development of high quality rice industry in Changzhou city: strengthening the planning of high quality rice, strengthening the infrastructure of high quality rice base, strengthening the green production of high quality rice, strengthening the brand building of high quality rice, strengthening the policy support of high quality rice.