scholarly journals SEED PRODUCTION FEASIBILITY STUDY ON SELECTED APPROVED RICE (Oryza sativa L.) HYBRID VARIETIES

2015 ◽  
Vol 28 (1) ◽  
pp. 23-28
Author(s):  
M. R. Islam ◽  
M. A. K. Mian ◽  
M. S. Ali
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Large Scale ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Rice Variety ◽  
Field Performance ◽  
Private Company ◽  
Rice Varieties

The seed production feasibility of approved hybrid varieties of rice were assessed using 15 commercially approved varieties comprising four public hybrids. Higher seed yield potentiality and earliness in maturity were the two most important indicators for popularizing hybrid rice variety in Bangladesh. The field performance of the approved hybrid rice varieties were found to vary significantly for different traits. Maximum outcrossing potential was observed in SL08HA followed by BRRI hybrid dhan2A but F1 seed yield per plant was the highest in BRRI hybrid dhan3A due to its high tillering ability followed by BRRI hybrid dhan2A, ACI1A and Heera2A. Among the tested entries F1 seed production potentiality of BRRI hybrid dhan3A was maximum indicated its commercial prospect of large scale seed production. Public bred hybrid BRRI hybrid dhan3 and BRRI hybrid dhan2 has immense potentiality for large scale commercialization but BRRI should ensure the quality of parental lines seed as well as supply sufficient amount of seeds according to the demand. Private company hybrids ACI1H and Heera2H have good commercial prospects but seed production under Bangladesh conditions needs to be fine tune.

scholarly journals Comparative Study on Seed Production Potentiality of Selected Rice (Oryza sativa L.) Hybrid Combinations

2020 ◽  
Vol 23 (1) ◽  
pp. 13-20
Author(s):  
M H Rahman ◽  
M J Hasan ◽  
M A Bari ◽  
M A Haque
Keyword(s):  
Comparative Study ◽  
Grain Yield ◽  
Seed Production ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Rice Variety ◽  
Field Performance ◽  
Spikelets Per Panicle ◽  
Rice Genotypes ◽  
Fine Tune

The seed production potentialities of selected 20 hybrid rice combination were assessed in this study. Higher seed yield potentiality and earliness in maturity were two of the most important indicators for popularizing hybrid rice variety in Bangladesh. The field performance of the selected hybrid rice combinations were found to vary significantly for different traits except number of total spikelets per panicle showed insignificant variation among the hybrid rice genotypes. The highest number of tillers per plant was recorded in BRRI7A/BRRI31R (17.33) which was followed by BRRI10A/BRRI20R (16.33) and BRRI7A/BRRI20R (16.17). Maximum number of panicles per plant was produced by BRRI7A/BRRI31R (14.00) which was followed by BRRI10A/BRRI31R (13.07), and BRRI11A/BRRI31R (12.47). The highest number of filled spikelets per panicle was produced by BRRI7A/BRRI31R (48.20) which was followed by IR79156A/BRRI31R (47.83) and BRRI7A/BRRI10R (44.63) respectively. The highest value for percent out crossing rate (%OCR) was observed in the combination of BRRI7A/BRRI31R (50.23%) which was followed by BRRI10A/BRRI10R (46.40%). The highest value for grain yield per plant was recorded in BRRI7A/BRRI31R (8.17g) followed by BRRI10A/BRRI10R (7.85 g) and BRRI11A/BRRI15R (7.68 g), respectively. The lowest value for grain yield per plant was found in IR79156A/BRRI31R (3.97 g). Considering comparative study of floral traits, BRRI7A/BRRI31R hybrid rice combination has good commercial prospects but seed production potentiality under Bangladesh conditions needs to be estimated with fine tune. Bangladesh Rice j. 2019, 23(1): 13-20

Optimization of GA3 and row ratio for seed yield of a promising hybrid rice variety

2018 ◽  
Vol 44 (4) ◽  
pp. 671-674 ◽  
Author(s):  
MJ Hasan ◽  
MH Rahman ◽  
A Akter ◽  
MU Kulsum
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Hybrid Rice ◽  
Rice Variety ◽  
Cms Line

GA3 application at the rate of 225 g/ha with 12 rows of cytoplasmic male stenile (CMS) line and two rows of restorer lines appeared to be the optimum for highest yield of rice. This combination found results of per out crossing rate (OCR) (3.29 t/ha) for F1 seed production.

scholarly journals Assessment of Appropriate Doses of GA3 and Row Ratio for Better Seed Yield of a Promising Hybrid Rice Variety

2015 ◽  
Vol 19 (1) ◽  
pp. 57-61
Author(s):  
MJ Hasan ◽  
MH Rahman ◽  
A Akter ◽  
MU Kulsum ◽  
A Islam
Keyword(s):  
Field Experiment ◽  
Seed Production ◽  
Seed Yield ◽  
Hybrid Rice ◽  
Rice Variety ◽  
Dry Season ◽  
Hybrid Seed ◽  
Hybrid Seed Production ◽  
Research Institute

A field experiment was carried out at the Bangladesh Rice Research Institute (BRRI) farm, Gazipur during dry season 2013-14 to find out the appropriate GA3 dose and row ratio for hybrid seed production. GA3 doses were applied @ 0, 80, 160, 240 and 320 g ha-1 with different row ratio. Results revealed that GA3 application influenced the panicle exsertion rate only. The calculated optimum GA3 dose was 302.4 g ha-1 with the highest PER (84.62%). Seed yield and OCR were influenced by row ratio. The highest OCR was observed with 2:12 row ratio while the highest seed yield was found in 2:14 row ratio.Bangladesh Rice j. 2015, 19(1): 57-61

scholarly journals Hybrid rice development in Indonesia: constraints and opportunities

2021 ◽  
Vol 306 ◽  
pp. 01047
Author(s):  
Satoto ◽  
Yuni Widyastuti
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Hybrid Rice ◽  
Hybrid Seed ◽  
Rice Seed ◽  
Hybrid Seed Production ◽  
Rice Varieties ◽  
Private Companies ◽  
Climatic Fluctuations ◽  
Seed Grower

This paper reviews the constraints and opportunities of hybrid rice development in Indonesia. Indonesia has released more than a hundred hybrid rice varieties; Indonesian Center for Rice Research (ICRR) developed 21 varieties. Extensive trials were conducted on the various aspects of seed production by government sectors and private companies. Significant progress has been made in hybrid rice seed production, with seed yield increasing from 1 t/ha to 3 t/ha. Various problems should be considered to develop a good seed production system. The constraints are the low outcrossing rate, shortage of suitable land, high cost and labor, lack of trained personnel, climatic fluctuations in rainfall and temperature, and limited hybrid rice seed grower. Private sectors investment in hybrid rice has been increased. Positive support from government and private companies will boost hybrid rice’s adoption rapidity. Collaboration of hybrid rice dissemination across institutions was a meaningful way to encourage hybrid rice adoption. Optimizing seed production technologies could significantly increase the present level of hybrid seed yield. The opportunities are an increase of rice demand, various materials genetic, distribution of rice ecosystem, and public-private sector partnership that developed on hybrid seed production to accelerate the adoption of hybrid rice. It supports not only the research and development but also the dissemination and adoption.

scholarly journals Comparison of Morphological and Physicochemical Properties of a Floury Rice Variety upon Pre-Harvest Sprouting

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 746
Author(s):  
Chae-Min Han ◽  
Jong-Hee Shin ◽  
Jung-Bae Kwon ◽  
Jong-Soo Kim ◽  
Jong-Gun Won ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Rice Variety ◽  
Wheat Variety ◽  
Economic Loss ◽  
Rice Grain ◽  
Starch Granules ◽  
Rice Varieties ◽  
Starch Structure ◽  
Gelatinization Properties

Pre-harvest sprouting (PHS) severely reduces rice grain yield, significantly affects grain quality, and leads to substantial economic loss. In this study, we aimed to characterize the physicochemical properties and processing quality of the Garumi 2 flour rice variety under PHS conditions and compare them with those of the Seolgaeng, Hangaru, Shingil, and Ilpum rice varieties and the Keumkang wheat variety. Analysis of the molecular structure of starch revealed uniform starch granules, increased proportions of short-chain amylopectin in DP 6–12 (51.0–55.3%), and enhanced crystallinity (30.7–35.7%) in rice varieties for flour compared with the Ilpum cooking rice variety. PHS significantly altered the starch structure and gelatinization properties of Garumi 2. It also caused surface pitting and roughness in Garumi 2 starch granules and decreased their crystallinity. Collectively, the findings of this study provide important novel insights into the effects of PHS on the physicochemical properties of Garumi 2 floury rice for flour.

scholarly journals Detection of QTLs for Outcrossing-Related Traits in CSSL Population Derived from Primitive Japonica Accession Ludao in the Genetic Background of O. sativa spp. Japonica Restorer C-bao Using RSTEP-LRT Method

Agronomy ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 28
Author(s):  
Lal Bux ◽  
Dalu Li ◽  
Muhammad Faheem ◽  
Nour Ali ◽  
Muzafar Hussain Sirohi ◽  
...  
Keyword(s):  
Seed Production ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Flag Leaf ◽  
Leaf Angle ◽  
Ratio Test ◽  
Phenotypic Variance ◽  
Rice Seed ◽  
Hybrid Seed Production ◽  
Cms Line

The outcrossing traits in rice (Oryza sativa L.) affect the yield of hybrid seed production. Using a cytoplasmic male sterile (CMS) line with good outcrossing traits, such as short flag leaf length (FLL), narrow flag leaf width (FLW), wide flag leaf angle (FLA), and elongated panicle neck length (PNL), for hybrid rice seed production, it is possible to avoid the procedure of cutting flag leaves and make the supplementary pollination feasible by machine. In this study, a japonica restorer C-bao as the receptor parent and a primitive japonica accession Ludao as the donor parent were used to construct a chromosome segment substitution line (CSSL) population. The CSSL population was used to detect quantitative trait loci (QTLs) for the four outcrossing traits using a likelihood ratio test based on the stepwise regression (RSTEP-LRT) method. The CSSL population constructed consisted of 163 lines covering 90.7% of the donor genome. Among the seven QTLs detected in the CSSL population, four QTLs were detected in both years. qFLL-4 explained 6.70% of the two-year-averaged phenotypic variance, and the alleles from Ludao decreased FLL 5.1 cm. qFLA-1.1 and qFLA-1.2 explained 7.85% and 21.29% of the 2-year-averaged phenotypic variance respectively, and the alleles from Ludao increased FLA 17.38° and 31.50°. qPNL-8 explained 8.87% of the 2-year-averaged phenotypic variance, and the alleles from Ludao increased PNL 4.44 cm. These favorable alleles identified could be used to improve the outcrossing traits of parents for hybrid rice seed production in rice.

scholarly journals Method of increasing yield indicators of rice varieties in process of seed production

2021 ◽  
Vol 262 ◽  
pp. 03009
Author(s):  
N. A. Ochkas ◽  
Yu. K. Goncharova ◽  
O. A. Braginа ◽  
K.S. Krikun
Keyword(s):  
Theoretical Model ◽  
Seed Production ◽  
Environmental Conditions ◽  
Rice Variety ◽  
Rice Varieties ◽  
Single Row ◽  
Maximum Value ◽  
Field Germination ◽  
Yield Structure ◽  
Optimal Values

The paper describes a method for creating new and increasing the yield of existing varieties based on analysis variability elements of rice varieties yield structure under influence of environmental conditions. Seeding rates are used as a source of variability. Following trait are analyzed: seeds field germination, survival plants before harvesting, total tillering of plants, realization of total tillering, graininess of panicle, fertility of spikelets, weight of 1000 grains. Based on analysis, through onnections conjugated elements, the optimal values of elements structure of yield are determined, at which it takes the maximum value. Based on a set of optimal values, theoretical model of studied rice variety is being developed. Then, according to panicles selected in variety, single-row plots are sown for further propagation, rows with parameters of the yield structure elements set same with model of variety are selected, which makes it possible to increase the yield of Mavr rice variety by 39.18 centners / ha or 45.61%.

Breeding for Improving Human Nutrition and Grain Quality through Biofortification of Traditional Land Races and Improved Cultivars in Rice (Oryza sativa L.)

2017 ◽  
pp. 126-148
Author(s):  
P. Savitha ◽  
R. Usha Kumari
Keyword(s):  
Oryza Sativa ◽  
Tamil Nadu ◽  
Oryza Sativa L ◽  
Farming Systems ◽  
Total Production ◽  
Micronutrient Deficiencies ◽  
Rice Varieties ◽  
The Family ◽  
Iron And Zinc

Rice (Oryza sativa L.) which belongs to the family poaceae, is the life and the prince among cereals as this unique grain helps to sustain two thirds of the world's population. India have traditionally been used or rice cultivation due to availability of water and conductive soil (Nadesa panic). Rice was grown in 155.30 million hectares and around 600 million tonnes of rice harvested each year globally. About 114 countries produce rice with China and India supporting 50 per cent of total production. India stands first in area under cultivation (41.85 mha) and ranks second in production, where as China ranks first in production with just half of the area. India's production is 89.13 million tonnes with a productivity of 2130 kg/ha. Among the rice producing states of India, Tamil Nadu ranks sixth in production (6.53 million tonnes) and second in productivity of 3918 kg/ha with an area of 20.16 lakh ha (Season and Crop Report, 2012). Local farmers in such farming systems retain the traditional varieties based on their knowledge of the quality of the rice varieties and their adaptation to varying agro-ecological situations created by diverse seasons and land situations (Tapasi das & Ashesh Kumar Das, 2014). Among the major micronutrient deficiencies common in rice consuming countries, iron and zinc deficiencies (“hidden hunger”), affect over three billion people worldwide, mostly in developing countries (Welch & Graham, 2004).

scholarly journals Quality Analysis Of Organic Rice Variety Mentik Susu And Sintanur Nutritional Approach

2018 ◽  
Vol 215 ◽  
pp. 02011
Author(s):  
Sri Handayani ◽  
Muhammad Irfan Affandi ◽  
Sussi Astuti
Keyword(s):  
Rice Variety ◽  
Nutrient Content ◽  
Ash Content ◽  
Quality Analysis ◽  
Laboratory Research ◽  
Rice Varieties ◽  
Organic Rice ◽  
Climate Suitability ◽  
High Yields

Organic rice production in Indonesia is increasing due to the tendency of consumers who start to consume healthy food and one of them is organic rice. Varieties cultivated by farmers in Lampung Province is mentik susu and sintanur based on high yields and climate suitability. The quality of organic rice can be known through nutritional approach. The purpose of this research is to analyze quality comparison of organic rice of mentik susu and sintanur varieties with nutritional approach. The research methodology used is laboratory research. Data analysis methods used to answer the objective of a proximate test to determine the nutrient content of organic rice in both varieties of mentik susu and sintanur. Nutritional content that is cultivated is carbohydrates, fats, proteins, water, fiber, and ash content. The result of the analysis shows that carbohydrate, protein, and nutrient content of organic rice of mentik susu variety was higher than sintanur varieties. While the fat content, water content, and ash content of organic rice varieties mentik susu is lower than the sintanur varieties. In general it can be concluded that the quality of organic rice varieties mentik susu better than sintanur varieties.

scholarly journals Transcriptome and genome sequencing elucidates the molecular basis for the high yield and good quality of the hybrid rice variety Chuanyou6203

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Juansheng Ren ◽  
Fan Zhang ◽  
Fangyuan Gao ◽  
Lihua Zeng ◽  
Xianjun Lu ◽  
...  
Keyword(s):  
Molecular Mechanism ◽  
Hybrid Rice ◽  
Rice Variety ◽  
Utilization Efficiency ◽  
High Yield ◽  
Mrna Editing ◽  
High Quality ◽  
Flag Leaves ◽  
Yield And Quality

AbstractThe yield heterosis of rice is sought by farmers and strong contributes to food safety, but the quality of hybrid rice may be reduced. Therefore, developing new varieties with both high yield and good quality is a heavily researched topic in hybrid rice breeding. However, the molecular mechanism governing yield heterosis and high rice quality has not been elucidated to date. In this study, a comparative transcriptomics and genomic analysis was performed on a hybrid rice variety, Chuanyou6203 (CY6203), and its parents to investigate the molecular mechanism and gene regulation network governing the formation of yield and quality stages. A total of 66,319 SNPs and InDels between CH3203 and C106B were detected in the 5′-UTR, exon, intronic, and 3′-UTR regions according to the reference genome annotation, which involved 7473 genes. A total of 436, 70, 551, 993, and 1216 common DEGs between CY6203 and both of its parents were identified at the same stage in panicles and flag leaves. Of the common DEGs, the numbers of upregulated DEGs between CY6203 and CH3203 were all greater than those of upregulated DEGs between CY6203 and C106B in panicles and flag leaves at the booting, flowering, and middle filling stages. Approximately 40.61% of mRNA editing ratios were between 0.4 and 0.6, and 1.68% of mRNA editing events (editing ratio ≥ 0.8) in CY6203 favored one of its parents at three stages or a particular stage, suggesting that the hypothetical heterosis mechanism of CY6203 might involve dominance or epistasis. Also 15,934 DEGs were classified into 19 distinct modules that were classified into three groups by the weighted gene coexpression network analysis. Through transcriptome analysis of panicles and flag leaves in the yield and quality stages, the DEGs in the green-yellow module primarily contributed to the increase in the source of CY6203 due to an in increase in photosynthetic efficiency and nitrogen utilization efficiency, and a small number of DEGs related to the grain number added spikelet number per panicle amplified its sink. The balanced expression of the major high-quality alleles of C106B and CH3203 in CY6203 contributed to the outstanding quality of CY6203. Our transcriptome and genome analyses offer a new data set that may help to elucidate the molecular mechanism governing the yield heterosis and high quality of a hybrid rice variety.

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