Evaluation of excess water tolerant rice varieties Swarna sub-1 and CR-1009 sub -1 under Head to Head Project in East and South- Eastern Coastal Plain zone of Odisha

Flash flood or submergence is a common phenomenon in rice growing rainfed lowland areas that seriously affects crop establishment leading to severe yield losses. A few submergence–tolerant rice varieties have been developed by introgression SUB -1 gene into mega rice varieties of South Asia. Performance of this variety can be further enhanced through adoption of appropriate management practices. Farners Participatorty trials were conducted using Swarna- sub-1 and CR 1009 sub-1 during kharif, 2017 in three adopted villages at Erasama, Kujanga and Raghunathapur blocks of Jagatsinghpur district. Results of this experiment revealed that at recommended doses of N:P:K @ 80-40-40 Kgha-1, transplanting of 30 days aged seedlings and additional N-dose of 20kg/ha at 7 days after receding of flood water resulted in better post submergence recovery and maximum yield. Maximum number of tillers m-2 was recorded in CR 1009 sub -1 followed by Pooja and Swana Sub -1. Rice variety Swarna Sub –I rerecorded an yield of 55.23 q ha -1 which was 14.5% higher as compared to farmers variety Swrana 48.2 q ha -1. The Swarna Sub-1 and CR 1009 sub-1 survived in the flood and gave higher yield under submergence condition in the coastal flood prone area

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Development of Drought Tolerant Rice Variety BRRI dhan66 for Rainfed Lowland Ecosystem of Bangladesh

Bangladesh Rice Journal ◽

10.3329/brj.v23i1.46080 ◽

2020 ◽

Vol 23 (1) ◽

pp. 45-55

Author(s):

M A Kader ◽

T L Aditya ◽

R R Majumder ◽

T K Hore ◽

A K M Shalahuddin ◽

...

Keyword(s):

Flag Leaf ◽

Rice Variety ◽

Economic Loss ◽

Reproductive Stage ◽

Wet Season ◽

Rice Varieties ◽

Commercial Cultivation ◽

Drought Tolerant ◽

Rainfed Lowland ◽

Prone Area

A newly released drought tolerant rice variety BRRI dhan66 suitable for rainfed lowland ecosystem of Bangladesh is an improvement over existing drought tolerant rice varieties. The variety has satisfactorily been passed in the proposed variety trial conducted in the farmers’ field. As a result, National Seed Board (NSB) approved this variety for commercial cultivation in the wet season (T. Aman) in 2014. It has modern plant type with 120 cm plant height and matures in 110-115 days. The important feature of this variety is higher drought tolerance during reproductive stage. It can produce 4.5-5.0 t/ha grain yield without irrigation during reproductive stage. It can produce satisfactory yield when soil moisture remains <20% and perch water table depth is more than 70-80 cm from the surface. The seed size of the variety is 24 g with intermediate long bold grain. It has long, wide and erect flag leaf with deep green colour. It is highly promising as a drought tolerant rice variety for cultivation in the drought prone area, which helps farmers’ to get rid of huge economic loss and is contributing in sustaining food security. Bangladesh Rice j. 2019, 23(1): 45-55

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Assessment of vulnerability in agricultural sector in disaster prone areas of Bangladesh

Bangladesh Journal of Scientific Research ◽

10.3329/bjsr.v28i2.26780 ◽

2016 ◽

Vol 28 (2) ◽

pp. 91-101 ◽

Cited By ~ 1

Author(s):

TF Khan ◽

MW Ullah ◽

SM Imamul Huq

Keyword(s):

Agricultural Production ◽

Agricultural Development ◽

Agricultural Sector ◽

Flash Flood ◽

Agricultural Practices ◽

Cropping Pattern ◽

River Flood ◽

Prone Area ◽

Flood Prone Area ◽

Livelihood System

A study was carried out in 24 Upazillas of 12 districts of Bangladesh with a view to identifying risks, vulnerabilities and impacts of different types of natural disasters commonly occurring in Bangladesh with respect to agricultural production and sustainable agricultural development. Three districts were selected from each category of the disaster viz., drought, saline, river flood and flash flood prone. Two Upazillas were selected randomly from each district by considering the homogeneity (climate, agricultural practices, agricultural production, disaster risks, livelihood system, population, etc.) of the particular disaster affected areas. Of the four disasters, drought prone area covers the highest net cultivable area (NCA) measuring about 121 ha. Flash flood, salinity and river flood prone area covers approximately 115, 60 and 30 ha, respectively. The dominant cropping pattern in drought areas is Fallow-T.Aman-Wheat. In saline areas, it is Fallow-T. Aman- Pulse while in flood areas, it is Fallow-T.Aman- HYV Boro. Trend analysis shows that overall cropped area decreased by 1% in all disaster prone areas from 1984 - 2013. The highest decrease in cropped area was found for pulse in both drought (13%) and river flood (14%) areas. In saline and flash flood areas, it was for spice and potato, respectively. Among 72 farmers, 85% is vulnerable to drought, 90% to salinity, 69% to river flood and 95% to flash flood. Medium high land was found to be the most vulnerable for agricultural production in all disaster prone areas. Due to vulnerability to disasters, medium high land remains fallow in saline (83%), river flood (51%) and flash flood (31%) areas. In case of drought regions, medium low land (37%) remains fallow.Bangladesh J. Sci. Res. 28(2): 91-101, Dec-2015

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Marker assisted introgression of bacterial blight resistant gene into submergence tolerance rice variety BRRI dhan52

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v42i3.34499 ◽

2017 ◽

Vol 42 (3) ◽

pp. 403-411 ◽

Cited By ~ 1

Author(s):

ME Kabir ◽

KM Iftekharuddaula ◽

MAI Khan ◽

MAK Mian ◽

NA Ivy

Keyword(s):

Resistance Genes ◽

Bacterial Blight ◽

Flash Flood ◽

Rice Variety ◽

High Yield ◽

Recurrent Parent ◽

Breeding Lines ◽

Resistant Gene ◽

Rainfed Lowland ◽

Elite Breeding Lines

BRRI dhan52 is a uniquire submergence tolerant rice variety containing prominant genetic background of BR11, a mega rainfed lowland rice (RLR) variety of Bangladesh, but is susceptible to bacterial blight (BB) caused by Xanthomonas oryzae pv. oryzae (Xoo). The variety is considerably popular in the southern part of Bangladesh due to its high yield in flash flood condition and comparatvely medium slender grain. Molecular markers linked to BB resistance genes (Xa genes) and submergence QTL (SUB1) were utilized in a marker-aided selection program to develop elite breeding lines with broad-spectrum resistance to bacterial blight. Sequence tagged site (STS) and simple sequence repeat (SSR) markers were essentially used to detect the genes for BB and submergence as well. In backcross generation, markers closely linked to Xa21 and SUB1 QTL were used to select desirable plants possessing these resistance genes (foreground selection) and microsatellite markers polymorphic between donor and recurrent parent were also used to select plants that have maximum contribution from the recurrent parent genome (background selection). In BC1F1 generation, three best plants consiquently were selected from previously selected ten double heterozygous (Xa21 and SUB1 QTL) plants. The percentage of recipient genome recovery in the best plant 1, 2 and 3 were 78.7%, 75.83% and 75.4%, respectively. Eventually this work illustrates the successful application of marker-assisted breeding for introgression of bacterial blight resistant gene into a rice variety of Bangladesh.Bangladesh J. Agril. Res. 42(3): 403-411, September 2017

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Enhancing Rice Productivity through integration of Stress Tolerant Rice Varieties and Improved Nutrient Management Practices in Saline Areas of Bangladesh

Bangladesh Rice Journal ◽

10.3329/brj.v21i1.37387 ◽

2018 ◽

Vol 21 (1) ◽

pp. 77-89

Author(s):

MKA Bhuiyan ◽

AJ Mridha ◽

S Singh ◽

AK Srivastava ◽

US Singh ◽

...

Keyword(s):

Grain Yield ◽

Interaction Effect ◽

Management Practices ◽

Nutrient Management ◽

N Uptake ◽

N Fertilization ◽

Rice Varieties ◽

Total N ◽

Significant Difference ◽

N Dose

The study was conducted in two locations of coastal districts Patuakhali and Satkhira during 2012 and 2013 T. Aman season. Stress tolerant rice varieties along with nitrogen application using prilled urea (PU), leaf color chart (LCC), urea super granule (USG), and rice crop manager (RCM) software based nitrogen (N) dose were examined. The objectives of the study were to identify the response of saline tolerant varieties to N fertilization on grain yield and profitability. Among the tested varieties, grain yield of BRRI dhan40, BRRI dhan41 and BRRI dhan54 were higher compared to BRRI dhan52 and BRRI dhan53 irrespective of location. There were no significant difference among the better performed varieties. Interaction effect of yield was significant in 2013 at Patuakhali but insignificant in both the locations in 2012. During 2013 in Patuakhali, the interaction effect of BRRI dhan40 × USG and BRRI dhan41 × USG produced higher grain yield and total N uptake. In Satkhira BRRI dhan54 and BRRI dhan40 performed better and produced higher grain yield and N uptake. Among the N application treatments USG application was the best compared to either LCC or RCM. The combination of BRRI dhan54×USG and BRRI dhan41×USG had more economic gains in both 2012 and 2013 in Patuakhali. The combination of BRRI dhan52×USG and BRRI dhan41×LCC appeared as themost profitable in Satkhira during 2013. Integration of saline tolerant varieties along with USG application could improve the yield of saline tolerant rice in saline environmentBangladesh Rice j. 2017, 21(1): 77-89

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The floating traditional Rice Techno-Demonstration for Community Food Security

International Journal of Agricultural Extension ◽

10.33687/ijae.007.01.1778 ◽

2019 ◽

Vol 7 (1) ◽

pp. 09-11

Author(s):

Pasigan U. Buisan ◽

Nasrudin A. Buisan

Keyword(s):

Water Hyacinth ◽

Crop Production ◽

Management Practices ◽

Rice Variety ◽

The Philippines ◽

Rice Production ◽

Community Food Security ◽

Rice Varieties ◽

Significant Difference ◽

Traditional Rice

Rice ranks as the most important cereal in the Philippines. It is one of the country’s largest agricultural production systems, highest among crop production. The general objective of the study was to determine if traditional rice variety can give optimum yield when planted in the floating area. The materials used were traditional rice varieties. The water hyacinth was converted into a rice floating area. Data gathered was analyzed using the analysis of variance. The LSD Test was employed to compare the significant difference between treatment mean values. Floating rice production is a viable option among small farmers particularly in areas where water availability is not control such as marshy area. Local materials such as water hyacinth as floater are widely available. There is a need however, for a sound cultural management to make it sustainable. The good agronomic characteristics of the rice varieties can be attributed by the types of variety and the management practices. The floating area can be converted a potential area for rice production for a certain community particularly in the marshy area. However, there a need for a sound management practices in the floating area that can farmers may adopt for a sustainable rice floating production area

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Effect of harvest time of paddy on milled rice yield and broken kernels

Agricultural Science and Technology ◽

10.15547/ast.2019.04.055 ◽

2019 ◽

Vol 11 (4) ◽

pp. 327-331

Author(s):

V. N. Markova Ruzdik Ilieva ◽

N. Markova Ruzdik ◽

D. Vulcheva ◽

Lj. Mihajlov ◽

M. Ilievski

Keyword(s):

Moisture Content ◽

Rice Yield ◽

Rice Variety ◽

Maximum Yield ◽

Harvest Time ◽

Milled Rice ◽

Rice Varieties ◽

Yield And Quality ◽

Rice Yields

Abstract. The aim of this study was to determine the optimal harvest time to achieve maximum milled rice yield and quality of white rice in some newly introduced Italian rice varieties grown under agro-ecological conditions in the region of Kocani town, Republic of North Macedonia. During the 2014 and 2015, fourteen rice varieties were cultivated to estimate the milled rice yield and broken kernels from three different harvest times. From each rice variety, samples with moisture content between 20-22% (I variant), 18-20% (II variant) and 16-18% (III variant) were taken. From the third harvest variant the highest percentage of milled rice yield (65.23%) was obtained but also the highest rate of broken kernels (12.79%). From the remaining two harvests, almost identical milled rice yields were received (64.19% from the first variant and 64.33% from the second variant), but in terms of broken kernels, there were significant differences. The optimum moisture content during the harvest in order to obtain maximum yield and quality of milled rice ranged from 18% to 20%. The varieties Arsenal, Sprint and Mirko had the most favorable values for milled rice yield and broken kernels.

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Glycaemic responses to glucose and rice in people of Chinese and European ethnicity

10.26686/wgtn.12831854 ◽

2020 ◽

Author(s):

M Kataoka ◽

BJ Venn ◽

SM Williams ◽

Lisa Te Morenga ◽

IM Heemels ◽

...

Keyword(s):

Ethnic Differences ◽

Rice Variety ◽

Glycaemic Index ◽

Activity Levels ◽

Glycaemic Response ◽

Rice Varieties ◽

Adjusted Risk ◽

Postprandial Glycaemia ◽

Adjusted Risk Ratio ◽

Glucose Curve

Aims: Diabetes rates are especially high in China. Risk of Type 2 diabetes increases with high intakes of white rice, a staple food of Chinese people. Ethnic differences in postprandial glycaemia have been reported. We compared glycaemic responses to glucose and five rice varieties in people of European and Chinese ethnicity and examined possible determinants of ethnic differences in postprandial glycaemia. Methods: Self-identified Chinese (n = 32) and European (n = 31) healthy volunteers attended on eight occasions for studies following ingestion of glucose and jasmine, basmati, brown, Doongara® and parboiled rice. In addition to measuring glycaemic response, we investigated physical activity levels, extent of chewing of rice and salivary α-amylase activity to determine whether these measures explained any differences in postprandial glycaemia. Results: Glycaemic response, measured by incremental area under the glucose curve, was over 60% greater for the five rice varieties (P < 0.001) and 39% greater for glucose (P < 0.004) amongst Chinese compared with Europeans. The calculated glycaemic index was approximately 20% greater for rice varieties other than basmati (P = 0.01 to 0.05). Ethnicity [adjusted risk ratio 1.4 (1.2-1.8) P < 0.001] and rice variety were the only important determinants of incremental area under the glucose curve. Conclusions: Glycaemic responses following ingestion of glucose and several rice varieties are appreciably greater in Chinese compared with Europeans, suggesting the need to review recommendations regarding dietary carbohydrate amongst rice-eating populations at high risk of diabetes. © 2012 Diabetes UK.

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Tailoring rice varieties to consumer preferences induced by cultural and colonial heritage: Lessons from New Rice for Africa (NERICA) in The Gambia

Outlook on Agriculture ◽

10.1177/00307270211019758 ◽

2021 ◽

pp. 003072702110197

Author(s):

Kofi Britwum ◽

Matty Demont

Keyword(s):

Consumer Preferences ◽

Rice Variety ◽

Import Substitution ◽

The Gambia ◽

Rice Varieties ◽

Auction Market ◽

Asian Rice ◽

Market Competitiveness ◽

New Varieties ◽

Locally Grown

Rice breeding priorities in Africa often focus on agronomic gains. However, being a net importer of rice, the continent’s varietal replacement success also crucially hinges on new varieties’ market competitiveness vis-à-vis imports. Markets have been profoundly shaped by cultural and colonial heritage. Indigenous preferences for African rice can be traced back to ancient rice domestication and have been subsequently influenced by Asian rice import standards as a result of colonial import substitution policies. New Rice for Africa (NERICA) crosses between African and Asian rice species have the potential to reconcile these dual indigenous/import preferences, but little is known about their market competitiveness. We use auction market data to assess the intrinsic and extrinsic consumer value of NERICA in The Gambia relative to two market standards: branded, Asian rice imports and the most popular locally grown Asian rice variety. We categorize rice consumers into four market segments, based on their heritage as evidenced by their preferences and genealogical lineages. NERICA outperforms both Asian rice standards in terms of market competitiveness, and its value is further reinforced by colonial heritage and labeling, but somewhat weakened by cultural heritage. Consumers were found to pay price premiums for NERICA in the range of 5% to 22% relative to Asian rice imports, with the highest premiums offered by consumers with colonial heritage, representing 86% of the sample. Maintaining and expanding this market will require breeders to incorporate trait mixes that reconcile agronomic gains and consumer preferences induced by cultural and colonial heritage.

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

Foods ◽

10.3390/foods10040746 ◽

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.

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