scholarly journals Genetic Improvement of Grain Quality Promoted by High and New Technology in Rice

2018 ◽  
Vol 11 (1) ◽  
pp. 81
Author(s):  
Bo Peng ◽  
Jun Li ◽  
Dong-Yan Kong ◽  
Lu-Lu He ◽  
Meng-Ge Li ◽  
...  
Keyword(s):  
Genetic Improvement ◽  
Grain Quality ◽  
High Throughput Sequencing ◽  
Near Infrared ◽  
Oryza Sativa L ◽  
New Technology ◽  
Rice Grain ◽  
New Techniques ◽  
Genomic Editing

Rice (Oryza sativa L.) is considered as one of the most important food crops all over the world. Because of the improvement of the actual living standards, there is more and more demand for improved grain quality. Although, the grain quality is a very complex quantitative trait in rice, it has great scientific significance and practical application value for the improvement of the quality of rice grain using high and up to date techniques. Here, we focus on the new advances in the application of the genetic improvement of grain quality by high throughput sequencing, genomic editing, near infrared spectroscopy, scanning electron microscopy, and other new techniques. Simultaneously, the application prospects of these high and up to date techniques have also been expected in the genetic improvement of rice quality. Thus, this will provide important information for genetic improvement of grain quality in rice breeding.

scholarly journals Bulked Segregant Analysis Coupled With Whole-Genome Sequencing (BSA-Seq) and Identification of a Novel Locus, qGL3.5, That Regulates Grain Length

2021 ◽  
Author(s):  
Haiyan Zhao ◽  
Yuebin Zheng ◽  
Feng Bai ◽  
Yang Liu ◽  
Sicheng Deng ◽  
...  
Keyword(s):  
High Throughput Sequencing ◽  
Bulked Segregant Analysis ◽  
Functional Characterization ◽  
Quality Data ◽  
Rice Grain ◽  
Grain Length ◽  
Starting Point ◽  
New Gene ◽  
Membrane Bound

Abstract Rice grain length (GL) directly affects the yield and quality of this species. Very few GL-related genes cloned are applied in production because their yield-increasing effect was not obvious. In this study, the two bulk-DNA pools (L-pool and S-pool) and their parents’ (KJ01 and Huaye 4) DNAs were subjected to high-throughput sequencing. After assessing the quality of the data, we obtained a total of 100.22 Gb of high-quality data; the average coverage depth was 55x, and the genome coverage was 96.51%. After combining the association results of the ED and SNP index methods, we mapped the GL genes to a 0.34 Mb “hotspot” region on chromosome 3, which contains 37 genes related to various traits. The 37 predicted genes were further analyzed by the use of the Gene GO, COG database and so on. Thirty-three genes were annotated by GO functions. According to the GO annotations, three genes whose molecular function involved in the plasma membrane and intracellular membrane-bound organelles were detected via CRISPR/ Cas9 editing technology. ORF33 was verified to regulate GL and was the target gene qGL3.5. These results provides a new gene resource for rice grain shape breeding and a starting point for functional characterization of the wild rice GL gene.

scholarly journals The Nutritional Components of Rice are Closely Related to Grain Quality Traits in Rice

2020 ◽  
Vol 11 (2) ◽  
pp. 239
Author(s):  
Bo Peng ◽  
Ke-Xin Jin ◽  
Dian-Ya Luo ◽  
Xia-Yu Tian ◽  
Yan-Fang Sun ◽  
...  
Keyword(s):  
Grain Quality ◽  
Decisive Role ◽  
Mineral Elements ◽  
Rice Grain ◽  
Quality Traits ◽  
Rice Quality ◽  
New Varieties ◽  
Physical And Chemical ◽  
The Relationship

Starch, protein and lipid are the most important nutrients in rice, and their composition and content in rice grains play a decisive role in the grain quality. Rice quality (including appearance quality, cooking quality, nutrition quality, grinding and processing quality, etc.) is not only affected by the composition of the nutrients in grain of rice, but also by the physical and chemical characteristics and their content in grains, but also vulnerable to external environmental conditions. To clarify the relationship between the main nutrients in rice and their grain quality traits is of great theoretical significance and potential application value for the continuous improvement of rice quality in the future. Therefore, this paper reviewed the effects of starch, protein, lipid and mineral elements in grain of rice and also on quality of trait in rice. It is also discussed the relationship between these nutrients and rice grain quality traits. All of those will provide important information for the quality of grain improvement and breeding of new varieties with high quality in rice.

scholarly journals Molecular Marker-Assisted Selection of Rice Grain Quality on Rice (Oryza sativa L.) Lines Tolerant to Fe Toxicity Stress

2017 ◽  
Vol 7 (3) ◽  
pp. 268-276 ◽  
Author(s):  
Silvia Utami ◽  
Utut Widyastuti ◽  
Dwinita Utami ◽  
Ida Rosdianti ◽  
Puji Lestari
Keyword(s):  
Oryza Sativa ◽  
Molecular Marker ◽  
Marker Assisted Selection ◽  
Grain Quality ◽  
Oryza Sativa L ◽  
Rice Grain ◽  
Fe Toxicity ◽  
Selection Of

Effects of short-term heat stress at booting stage on rice-grain quality

2019 ◽  
Vol 70 (6) ◽  
pp. 486 ◽  
Author(s):  
Fengxian Zhen ◽  
Wei Wang ◽  
Haoyu Wang ◽  
Junjie Zhou ◽  
Bing Liu ◽  
...  
Keyword(s):  
Heat Stress ◽  
Protein Content ◽  
Grain Quality ◽  
Amylose Content ◽  
Rice Grain ◽  
Quality Traits ◽  
Short Term ◽  
Booting Stage ◽  
Severe Heat Stress

Extreme heat-stress events are becoming more frequent under anticipated global warming, which is having devastating effect on grain yield, as well as quality, of rice (Oryza sativa L.). The effects of heat stress at booting stage on grain quality of two japonica varieties, Nanjing41 and Wuyunjing24, were investigated in phytotrons during 2014 and 2015. Rice plants were subjected to four mean temperature regimes 27°C, 31°C, 35°C and 39°C of 2, 4 and 6 days’ duration. The results showed that high temperatures of 35°C and 39°C for 4 and 6 days significantly reduced panicle size, seed-setting rate, grain size, chalky grain rate, milling characteristics and amylose content, but increased protein content. Severe heat stress decreased values of peak viscosity and breakdown, and increased pasting temperature. An increase in heat degree-days decreased the percentage of chalky grains exponentially, and decreased amylose content and increased protein content linearly. Sensitivity of grain quality to heat stress in the two varieties differed among quality traits and with heat stress intensity. This study indicates that rice-grain quality had some resistance to mild heat stress, but it could not withstand severe heat stress at booting. Short-term heat stress at booting stage deteriorates most grain-quality traits, posing a potential risk to rice quality. The impacts on grain quality could be well quantified by the combined effects of the intensity and duration of heat stress at booting stage.

scholarly journals Quality of Rice Grain is Influenced by Organic and Inorganic Sources of Nutrients and Antioxidant Application

2016 ◽  
Vol 49 (4) ◽  
pp. 57-68 ◽  
Author(s):  
A.S. Gharieb ◽  
T.F. Metwally ◽  
S.H. Abou-Khadrah ◽  
A.A. Glela ◽  
A. El Sabagh
Keyword(s):  
Grain Quality ◽  
Foliar Application ◽  
Rice Variety ◽  
Rice Grain ◽  
Quality Traits ◽  
Chemical Fertilizers ◽  
Rice Quality ◽  
The Cost ◽  
Organic And Inorganic Fertilizers

Abstract The present research was conducted to study the influence of organic and inorganic sources of nutrients as well as antioxidant on rice quality. The experiment was designed in split-split plots with four replications, where main plots were assigned to nitrogen (0, 55, 110 and 165 kg N ha−1) and sub plots were allocated to compost (0, 3.5 and 7 tons ha−1), while the sub-sub plots were assigned to ascobien (control, spraying with ascobien in two times at 15 and 30 days after transplanting (DAT), spraying with ascobien three times at 15, 30 and 45 DAT). The result indicated that grain quality traits were significantly influenced by the organic and inorganic fertilizers, and ascobien. The percentage of hulling, milling and amylose were positively and significantly influenced by nitrogen, organic and antioxidants application. Most of studied characters produced the highest values with the organic fertilize were combined with nitrogen and antioxidants. Application of 110 kg N ha−1, 7 t ha−1 compost and two or three spraying of ascobien, 110 kg N ha−1 or 3.5 t ha−1 compost and three times spraying and 55 kg N ha−1, 7 t ha−1 compost and two times spraying could be recommended for optimum grain quality of Sakha106 rice variety. It can be concluded that compost along with the foliar application of ascobien can be saved from 50 to110 kg N ha−1, without reducing grain quality. It can be the key to reduce the need for chemical fertilizers and decrease the cost of production with keeping healthy soil.

Evaluating Techniques for Rice Grain Quality Using near Infrared Transmission Spectroscopy

1998 ◽  
Vol 6 (A) ◽  
pp. A111-A116 ◽  
Author(s):  
Naoto Shimizu ◽  
Jyunji Katsura ◽  
Takashi Yanagisawa ◽  
Bunji Tezuka ◽  
Yasuyuki Maruyama ◽  
...  
Keyword(s):  
Grain Quality ◽  
Near Infrared ◽  
Amylose Content ◽  
Rice Grain ◽  
Whole Grain ◽  
Infrared Transmission ◽  
Reliable Determination ◽  
Rice Quality ◽  
Head Rice ◽  
Apparent Amylose Content

The development of advanced evaluation techniques for rice quality has been a desire of the Japanese rice industry (breeding, distribution and processing). The objective of the present study is to develop novel techniques for evaluating rice grain quality. A reliable determination method for amylose in whole grain rice using near infrared transmission (NIT) is proposed, using Partial Least Squares (PLS) regression analysis. It was suggested from results based on two different validation methods that the PLS models have possibilities for determination of apparent amylose content using NIT spectroscopy. PLS modelling for constituents important in rice quality indicates that reasonably accurate models are attainable for moisture content and protein content in whole grain rice. However our PLS models were not sufficiently accurate for physical rice quality (head rice ratio, apparent density, whiteness) using NIT spectroscopy.

scholarly journals Dissecting the meteorological and genetic factors affecting rice grain quality in Northeast China

2021 ◽  
Author(s):  
Mojun Chen ◽  
Zhao Li ◽  
Jie Huang ◽  
Yongfeng Yan ◽  
Tao Wu ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Air Temperature ◽  
Northeast China ◽  
Grain Quality ◽  
Meteorological Factors ◽  
Grain Filling ◽  
Rice Grain ◽  
Filling Stage ◽  
Grain Filling Stage

Abstract Background The Northeast Plain of China, which is an important region for the production of high grain quality rice in China. However, the grain quality of the rice produced varies across this region, even for the same cultivar. Objective In order to explore the meteorological factors that have the greatest influence on quality and the transcriptional level differences between different cultivars and different locations at grain filling stage. Methods We grew eight rice cultivars in three locations in Northeast China during two growing seasons (2017 and 2018). We recorded meteorological conditions, including air temperature, air temperature range, and photosynthetically active radiation (PAR) during the grain-filling stage of each cultivar, and analyzed the grain quality of those eight cultivars. Results Across all eight cultivars, meteorological factors had a stronger effect on eating quality than genotype, while genotype had a stronger effect on milling quality. Of the three environmental factors assessed, PAR was significantly correlated with the most grain quality traits. Using RNA-sequencing analysis, we identified 573 environment-specific DEGs (Differentially Expressed Genes), and 119 genotype-specific DEGs; 11 DEGs were responsive to genotype × environment interactions. These DEGs were involved in many key metabolic processes. Conclusion Our results indicated that interactions among environmental factors, especially PAR, affected rice quality in Northeast China. Further analyses of the DEGs identified herein may provide useful information for future breeding programs aiming to develop high grain quality rice varieties suitable for cultivation across Northeast China.

scholarly journals Grain Quality of Rice (Oryza sativa L.) ‘Menthik Wangi’ of Organic Farming Yields

2021 ◽  
Vol 28 (2) ◽  
pp. 105
Author(s):  
Dwi Umi Siswanti ◽  
Maryani Maryani ◽  
Fitria Yulia Rachmawati ◽  
Aprida Niken ◽  
Rega Virgiyana Agustin ◽  
...  
Keyword(s):  
Organic Farming ◽  
Oryza Sativa L ◽  
Seed Viability ◽  
Fat Content ◽  
Growth Potential ◽  
Rice Grain ◽  
Rice Seed ◽  
Organic Rice ◽  
Organic Cultivation

Organic rice is believed to have better nutrition than conventional rice. Not all organic rice grain is consumed. Most of the organic cultivation yields will be used as seed. Viability test is one of the quality test of rice seed. Viability is seed vitality that can be shown as a physiological and biochemical phenomenon. Seed that have high vigor will achieve high productivity levels as well. The aims of this research was to analyze the quality of rice cultivar Menthik Wangi of organic farming yields. The quality of rice seeds was tested by measuring the viability of seed and crude fat content. The test results demonstrate the viability of the grain has a 100% germination, 100% growth potential maximum, 99.33%, simultaneity grew, 97.33% vigor index, T50 2.33, and seed moisture content 10.67%. The fat content was conducted by soxhlet method and analyzed by T-test. The results showed that organic rice has a higher fat content (0.53%) than non-organic rice (0.24%). It can be concluded that rice seed cultivar Menthik Wangi of organic farming has a higher viability and fat content than the non-organic rice grain.

scholarly journals Understanding of Gene Action for Nutritional Traits in Elite Rice (Oryza sativa L.) Crosses

2021 ◽  
Author(s):  
N. Lingaiah ◽  
Surender Raju ◽  
N. Sarla ◽  
K. Radhika ◽  
V. Venkanna ◽  
...  
Keyword(s):  
Nutritional Quality ◽  
Grain Quality ◽  
Zinc Concentration ◽  
Gene Action ◽  
Oryza Sativa L ◽  
Iron Concentration ◽  
High Yield ◽  
High Quality ◽  
Selection Strategies

Background: The nature of inheritance and type of gene action governing nutritional traits are complex, hence a better understanding of the factors that contribute to the overall grain quality of rice will lay the foundation for developing new breeding and selection strategies for combining high quality with high yield. The present investigation was carried out to understand the gene action and inheritance of yield and nutritional quality traits in rice. Methods: Crosses were effected with ten parents in diallel fashion without reciprocals during kharif, 2014, in the next rabi 2014-15 itself, all the 45 F1s without reciprocals along with parents and two check varieties were grown for producing sufficient F2 seed. The data obtained from F1s and parents were analysed as per Method II (F1s + parents) and Model - I (fixed effect) of Griffing (1956) for combining ability. Result: In the present study, cross combinations viz., WGL-32100 x DRR Dhan-40, Ramappa x RP-Bio-5478-176 for intermediate amylose, WGL-32100 x Ramappa for high protein content, MTU 1010 x RP-Bio-5478-166, WGL-32100 x RP-Bio-5478-166 for iron concentration and RP-Bio-5478-166 x DRR Dhan-40, for zinc concentration were identified as the top ranking ones for further advancement.

Sign in / Sign up

Export Citation Format

Share Document