scholarly journals Analyses of yield related agronomic traits of Malaysian rice varieties

2020 ◽  
pp. 59-74
Author(s):  
Nur Aini Mohd Kasim ◽  
Chui-Yao Teh ◽  
Parameswari Namasivayam ◽  
Nur Fatihah Mohd. Yusoff ◽  
Chai-Ling Ho
Keyword(s):  
Agronomic Traits ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Total Yield ◽  
Development Program ◽  
Lowland Rice ◽  
Morphological Data ◽  
Phenotypic Traits ◽  
Rice Varieties ◽  
Plant Materials

Analyses of morphological and agronomic traits not only provide important information in the selection of rice varieties for breeding, these data are also important in deciding plant materials for molecular characterization and analysis of phenotypic traits of interest. The aim of the present study was to collect, analyze and compare the agro-morphological data of 6 upland rice and 17 lowland rice varieties (Oryza sativa L.) from the Malaysian rice germplasms grown under the same greenhouse condition. The common factors that contributed to yield per plant in both upland and lowland rice varieties are plant height and percentage of filled grains. Panicle length was positively correlated to grain yield in upland rice varieties while many other agronomic traits could affect the yield per plant in lowland rice varieties such as total number of tillers, total number of panicles per plant, flag leaf width and days-to-flowering. The upland rice varieties have a slightly higher average total grain number per panicle in compensation of a low number of panicles. The compensation in total grain numbers per panicle was not sufficiently significant to affect the total yield per plant most probably due to a low total number of grains per plant. Despite a high 100-grain weight in general, some of these upland rice varieties have more than 50% percentage of unfilled grains. Data on these rice germplasms may offer information on a valuable gene pool which can be utilized in different varietal improvement/development program in future.

Genetic Diversity of Local Upland Rice (Oryza sativa L.) Genotypes Based on Agronomic Traits and Yield Potential in North Buton, Indonesia

2017 ◽  
Vol 9 (4) ◽  
pp. 109-117 ◽  
Author(s):  
Budianti Kadidaa ◽  
Gusti Ray Sadimantar ◽  
Suaib . ◽  
La Ode Safuan ◽  
Muhidin .
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Agronomic Traits ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Yield Potential

scholarly journals Evaluation of Yields of Selected Upland Rice (Oryza sativa L) Varieties in a Humid Environment

2020 ◽  
pp. 77-84
Author(s):  
A. I. Nwonuala ◽  
L. D. Gbaraneh
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Block Design ◽  
State University ◽  
Yield Performance ◽  
Cropping Season ◽  
Port Harcourt ◽  
Rivers State

This study is aimed to evaluate the yield performance of 12 varieties of upland rice and to assess the agronomic traits that contribute to yield performance of these varieties. A 2-year field experiment was conducted in the Teaching and Research Farm of the Rivers State University, Port Harcourt, Nigeria. The twelve varieties which made up the twelve treatments were laid out in a Randomized Complete Block Design (RCBD) and replicated three times. The experimental site was loamy sand, medium acidic with the soil pH reduced in the second cropping season (pH 4.9 in 2012; and pH 4.8 in 2013). The varieties differed significantly amongst themselves in panicle weight, number of fertile spikelets, grain length/breath ratio, 1000 grain weight in 2012 and 2013 planting and grain yield in 2012 planting season. The ITA 321 had the highest yield of 10300.33 kg/ha in 2012 and 10533.33 kg/ha in 2013 followed by NERICA 1 having 9066.67 kg/ha (2012) and 9133.33 kg/ha (2013). The NERICA 2,3,4,5 and 6 also belonged to the high yielding group while APO, Vandana,  IR68 and ITA 150 recorded lower yields. Results of this evaluation have shown that ITA 321 and NERICA 1 can be grown in the tropical rainforest zone for paddy grain yield rather than ITA 150 which are already in use in this agro-ecological zone. They are recommended also for adoption and use in rice production instead of the popular ITA 150.

scholarly journals Association Mapping of Drought Avoidance and Agronomic Traits in Rice (Oryza Sativa L.) Landraces with SSR Markers and Genotyping-By-Sequencing Approach

2020 ◽  
Author(s):  
Beena R ◽  
Silvas Kirubakaran ◽  
Nithya N ◽  
Sah R.P ◽  
Abida P.S ◽  
...  
Keyword(s):  
Ssr Markers ◽  
Genome Wide Association Study ◽  
Agronomic Traits ◽  
Oryza Sativa L ◽  
Genotyping By Sequencing ◽  
Plant Production ◽  
Plant Performance ◽  
Chromosome 1 ◽  
Production Traits ◽  
Rice Varieties

Abstract Development of rice varieties suited to varying drought stress level, and crop stages, relies mainly on identifying new genetic resources and genomic targets to improve whole plant physiological processes and productivity. This study with 99 rice germplasm adapted to Southwestern Indian peninsular region genotyped with 100 SSR markers evaluated over five different seasons/field trials to characterize plant physiological, root traits and yield related traits under different intensity and crop stage experienced water limitation. Traits like chlorophyll stability index, leaf rolling, days to 50% flowering, chlorophyll content, root volume and root biomass were identified as best predictors of grain yield under stress. Genome-Wide Association Study revealed genetic variation and genomic targets underlying major QTLs for different physiological, root and plant production traits. Combined analysis with trials 1-4 revealed 14 genomic regions governing multiple traits that contribute to plant performance and productivity under water stress. Genetic characterization of nine selected landraces and two elite cultivars using genotyping-by-sequencing (GBS) revealed haplotype variation within genomic targets on chromosome 1, 4, 6 and 11 for potential use as molecular markers. The genetic and genomic resources identified will enable combining traits with agronomic value to optimize yield under stress and hasten trait introgression into elite cultivars.

scholarly journals Screening and evaluation of upland rice (Oryza sativa L.) varieties in inundated soil

2018 ◽  
Vol 51 (2) ◽  
pp. 63-69
Author(s):  
Sunday Ojo Adigbo ◽  
Philip Joseph Osadebay ◽  
Innocent Iseghohi ◽  
Cornelius Idowu Alarima ◽  
Nnennaya Ogechi Agbenin ◽  
...  
Keyword(s):  
Upland Rice ◽  
Oryza Sativa L ◽  
Rice Variety ◽  
Rice Varieties ◽  
Inland Valley ◽  
Short Period ◽  
Maturity Period ◽  
Vigorous Growth ◽  
Number Of Leaves ◽  
Screen House

Abstract Poor germination and subsequent low grain yield of dry seeded upland rice in the existing anaerobic and short niche between lowland rice and dry season crops in the inland valley necessitate the screening of 19 rice varieties. The identification of vigorous growth and short duration upland rice variety in anaerobic condition would optimize this niche. The potted experiment was carried out in the screen house of the Department of Crop Science and Horticulture, Federal University Oye-Ekiti, Ikole campus in 2015 to screen and evaluate the performance of upland rice varieties in inundated soils with a view to selecting the suitable variety or varieties that will fit into the existing niche in the inland valley. The experiment was laid in a complete randomization design and replicated three times. The number of leaves, biomass and grain weight plant−1 of the varieties were significantly (P ≤ 0.05 %) different. The number of tillers observed in WAB 56-104, NERICA 4, NERICA 6, NERICA 3, NERICA 5, NERICA 10, NERICA 9, ARICA 4 NERICA 1, FARO 63, FARO 65 and NERICA 8 varieties were significantly (P < 0.05) lower than those of Igbemo varieties. The numbers of days to 50 % flowering of NERICA 1, NERICA 2, NERICA 10, NERICA 5, NERICA 9, NERICA 3, NERICA 7, NERICA 8, ARICA 4 and WAB 56-104 varieties were the lowest. Although Igbemo brown, Igbemo white varieties had the highest grain yields per plant, their maturity period exceeded the short period. Thus, NERICA 2 and NERICA 5 varieties which had lower number of days to flowering could be considered as candidate varieties that can be optimized in the niche in question.

scholarly journals Identification of fgr gene and preliminary evaluation for agronomic traits of pandan sticky rice variety (Oryza sativa L.)

2019 ◽  
Vol 02 ◽  
pp. 39-48
Author(s):  
Toan D. Pham
Keyword(s):  
Oryza Sativa ◽  
Agronomic Traits ◽  
Oryza Sativa L ◽  
Rice Variety ◽  
Rice Production ◽  
Molecular Techniques ◽  
High Yield ◽  
Preliminary Evaluation ◽  
Rice Varieties ◽  
Fgr Gene

Rice (Oryza sativa L.) is the most important food crop in Vietnam particularly in the Mekong Delta. Screening of good quality and high yield rice varieties are needed for rice production in Vietnam. The purpose of this study was to use molecular techniques to identify fgr gene and to evaluate preliminarily agronomic traits of pandan sticky rice variety. The results showed that this variety contained fgr gene. The fragrant allele was amplified by ESP - IFAP primers with a product of 255 bp in size. Similarly, evaluation of agronomic traits showed that the pandan sticky rice variety displayed many desirable characteristics such as plant height of 108 cm, panicle length of 25.6 cm, seed/panicle 135, 100-grain weight 2.07 g, pandan smell, level 2 of alkali digestion, gel consistency 93 mm. These results were useful information and could be applied for improving and providing pandan sticky rice variety for rice production.

Varietal Trial of Traditional Upland Rice (Oryza sativa L.) Varieties Collected in the Province of Negros Occidental

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Angelie L Lumba ◽  
Mae Flor G Posadas
Keyword(s):  
Agricultural Research ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Block Design ◽  
Growth Yield ◽  
Growth And Yield ◽  
Rice Varieties ◽  
Statistical Tool ◽  
Significant Treatment ◽  
Rice Improvement

Thirteen traditional upland rice varieties (Kadidit Pilit, Red 64, Masipag 9, Masipag 15, Dinorado, Mindoro, Camuros, Masipag 22, Palawan, Suleg, Biday, Pilit , Pilit Talacdan) were evaluated in Randomized Complete Block Design (RCBD) in three replicates at the experimental area of Central Philippines State University (CPSU), Kabankalan City, Negros Occidental from November 2012 - April 2013. The parameters compared were their agronomic data on growth and yield, including grain characteristics. These data were processed using the one-way Analysis of Variance (ANOVA) with the Statistical Tool for Agricultural Research (STAR) (Version 2.0.1) while Duncan’s Multiple Range Test (DMRT) were used to compare significant treatment means at 1% level. The upland rice varieties showed significant variation in growth, yield showed distinct grain characteristics. Biday variety was the tallest, produced longer and wider leaves, and bore the longest panicle. Mindoro and Masipag 22 produced the most number of tillers. Pilit talacdan had the biggest culm, produced the heaviest panicle, with the highest number of filled grains per panicle. Pilit variety gave the heaviest weight of 1,000 grains. The grain features were also found to be distinct in each variety. The yield significantly varied among the upland rice varieties. Pilit and Pilit Talacdan gave the highest yield among the varieties grown at CPSU condition. The performing varieties would be used for upland rice improvement and breeding program and for further verification in the farmer’s field.

Utilisation of anther culture in rice (Oryza sativa L.) breeding in Italy

1994 ◽  
Vol 34 (7) ◽  
pp. 911 ◽  
Author(s):  
AM Callegarin ◽  
K Perfanov ◽  
G Dorotea ◽  
G Baldi
Keyword(s):  
Oryza Sativa ◽  
Anther Culture ◽  
Grain Quality ◽  
Agronomic Traits ◽  
Oryza Sativa L ◽  
Market Demand ◽  
Breeding Methods ◽  
Rice Varieties ◽  
Hybrid Lines

Increasing market demand has led to efforts to select for non-sticky, long-grain rice varieties suited to the Italian environment. The variability of recombinant populations derived from crosses between Italian and USA genotypes was exploited. Together with the conventional breeding methods, in vitro anther culture was used to obtain homozygous lines from crosses more quickly. Moreover, hybrid lines were obtained from crosses otherwise impossible to exploit owing to sterility in the F, generation (namely those resulting from crosses involving semi-dwarf USA varieties). Plant regeneration was obtained from 6 F, hybrids whose parents were chosen for their grain quality or their suitability to the Italian environment. About 5500 plantlets were regenerated. Of these, 1000 were albino, and about 50% of the green ones died after transplanting into soil; 65% of the surviving plants were sterile, so about 1000 progeny were obtained (30-445 for each cross). Progeny with desirable characteristics were evaluated for agronomic traits. On the basis of these results, limits and possibilities of anther-culture breeding in rice are discussed.

EVALUATION OF THREE RNA EXTRACTION METHODS FROM THREE CULTIVARS OF MALAYSIAN UPLAND RICE

2015 ◽  
Vol 78 (1) ◽  
Author(s):  
Shahkila Mohd Arif ◽  
Nyuk Ling Ma ◽  
Alina Wagiran ◽  
Zaidah Rahmat
Keyword(s):  
Upland Rice ◽  
Oryza Sativa L ◽  
Rna Extraction ◽  
Extraction Methods ◽  
Lowland Rice ◽  
World Population ◽  
Guanidine Isothiocyanate ◽  
The World ◽  
Young Leaves ◽  
Rna Extraction Methods

Rice (Oryza sativa L.) can be divided into two major categories, which is upland rice and lowland rice. Apart from being the staple food for more than half of the world population, it is also known as model plant for functional genomics study. However, it possess high amount of starch and polysaccharide that makes the isolation of good quality RNA for downstream purposes often a difficult task. While there are many studies being carried out for lowland rice extraction, none has been reported for upland rice. This study is the first to report on evaluation of three RNA extraction methods for three Malaysian upland rice cultivars in order to determine the best method to isolate high grade RNA. The result obtained demonstrated that good quality RNA in terms of integrity, purity and quality can be isolated from young leaves of these cultivars  by using guanidine isothiocyanate based extraction method that is fast, simple and efficient and had been proven suitable for further downstream applications.   

scholarly journals Assessment of genetic diversity in Thai upland rice varieties using SSR markers

2020 ◽  
pp. 597-604
Author(s):  
Somrudee Nilthong ◽  
Ekachai Chukeatirote ◽  
Rungrote Nilthong
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Simple Sequence Repeat ◽  
Genetic Resource ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Polymorphic Information Content ◽  
Rice Varieties ◽  
Simple Sequence Repeat Markers ◽  
Simple Sequence

Upland rice (Oryza sativa L.) is precious genetic resource containing some valuable alleles not common in modern germplasm. In this study, genetic diversity and population structure of 98 upland rice varieties from northern part of Thailand were examined using nine simple sequence repeat markers. Number of alleles detected by the above primers was 50 with a minimum and maximum frequency of 2 to 10 alleles per locus, respectively. The polymorphic information content (PIC) values ranged from 0.375 to 0.714 with an average of 0.605 for the primers RM164 and RM1, respectively. Dendrogram cluster analysis of the SSR data distinctly classified all genotypes into three major groups (I, II and III), which corresponded to their places of collection. Population structure divided these genotypes into two distinct subpopulations. Subpopulation 1 consisted of upland rice varieties that collected from Chiang Rai province while the majority of subpopulation 2 were collected from Phayao and Phitsanulok provinces. Analysis of molecular variance revealed 68% variance among two subpopulations and 32% variance within subpopulations, suggesting a high genetic differentiation between the two subpopulations. The huge genetic variability of upland rice in northern part of Thailand can be used to complement the gene pool of modern genotypes in rice breeding program.

Sign in / Sign up

Export Citation Format

Share Document