Genetic variation detected with RAPD markers among upland and lowland rice cultivars (Oryza sativa L.)

The objective of this work is to perform a prospective analysis of the wavelengths that can be used to recognize a rice crop due to its phenological status and variety. For this purpose, field measurements of spectral signature in the 350 nm -1049 nm range were employed. The rice cultivars FCA 616FL and IDIAP 54-05 were used. The study site was located in the Juan Hombrón area in the Coclé province, Panama. A principal component analysis (PCA) was carried out, which resulted in the lengths 728.16, 677.89 and 785.48 nm let phenological differentiation within the cultivar FCA 616FL and IDIAP 54-05, the lengths 729.72, 814.58 and 666.81 nm let distinguish between crop varieties FCA 616FL and IDIAP 54-05 in vegetative phase.Keywords: Rice, reflectance, hyperspectral signature, phonological state.

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GENETIC VARIATION AND PATH ANALYSIS ON AGRONOMIC TRAITS OF RECOMBINANT INBRED LINES IN RICE (Oryza sativa L.).

International Journal of Advanced Research ◽

10.21474/ijar01/6676 ◽

2018 ◽

Vol 6 (3) ◽

pp. 280-291

Author(s):

Myint Aye ◽

◽

NyoMar Htwe ◽

KhinMu Aye ◽

MoeMoeKyi Win ◽

...

Keyword(s):

Genetic Variation ◽

Oryza Sativa ◽

Path Analysis ◽

Recombinant Inbred ◽

Agronomic Traits ◽

Oryza Sativa L ◽

Recombinant Inbred Lines ◽

Inbred Lines

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PEMBERIAN POC GAMAL TERHADAP PERTUMBUHAN DAN PRODUKSI PADI SAWAH (Oryza sativa L.) DENGAN METODE SALIBU

EUGENIA ◽

10.35791/eug.24.1.2018.21650 ◽

2018 ◽

Vol 24 (1) ◽

Author(s):

Mifta Mamentu ◽

Jeanne M. Paulus ◽

Edy Lengkong

Keyword(s):

Oryza Sativa ◽

Grain Yield ◽

Plant Height ◽

Rice Field ◽

Oryza Sativa L ◽

Organic Fertilizer ◽

Field Research ◽

Lowland Rice ◽

Growth And Yield ◽

Treatment Factor

ABSTRACT The purpose of the research was to studied the application of gliricidia MOL on the growth and yield of lowland rice in the salibu method, and to get the best concentration of gliricidia liquid organic fertilizer (POC) on the growth and production of lowland rice. Field research has been conducted in Tababo Village, Subdistrict of Belang, district of Southeast Minahasa. The treatment in the experiment consists of one treatment factor, that were concentrations of gliricidia POC, ie : 0, 50 , 100, 150, and 200 ml/litre. The results showed that gliricidia POC have an effect on plant height, the number of grain/panicle, and the dry grain yield (GKP) / plot, but not affect the number of productive tillers and weight of 1,000 grain. The best results were achieved in gliricidia POC concentration 200 ml/litre with the highest values were: plant height was 98.93 cm; 116.420 grain/panicle; and 8.300 kg dry grain yield or equivalent to 6.92 ton/ha.Keywords : gliricidia POC, production, lowland rice, salibu method

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Callus Induction and Plantlet Regeneration Ability of Selected Sri Lankan Traditional Rice Cultivars (Oryza Sativa L.) in Caryopses Culture

Tropical Agricultural Research and Extension ◽

10.4038/tare.v15i2.5244 ◽

2013 ◽

Vol 15 (2) ◽

pp. 15

Author(s):

N Dahanayake ◽

AL Ranawake

Keyword(s):

Oryza Sativa ◽

Callus Induction ◽

Oryza Sativa L ◽

Plantlet Regeneration ◽

Regeneration Ability ◽

Sri Lankan ◽

Rice Cultivars ◽

Traditional Rice

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Modulation of ascorbate-glutathione cycle by selenate and sulphate treatments in the seedlings of two rice (Oryza sativa L.) cultivars

Plant Science Today ◽

10.14719/pst.2020.7.3.746 ◽

2020 ◽

Vol 7 (3) ◽

Author(s):

Debarati Das ◽

Paulin Seal ◽

Sabarni Biswas ◽

Asok K Biswas

Keyword(s):

Oryza Sativa ◽

Growth And Development ◽

Elevated Level ◽

Oryza Sativa L ◽

Ascorbate Oxidase ◽

Rice Cultivars ◽

Rice Seedlings ◽

Thiol Metabolism ◽

Regulatory Enzymes ◽

Glutathione Cycle

The trace element Selenium (Se) has a dual role in the growth and metabolism of plants. Low concentration of selenium (2 ?M selenate) promotes growth and counteracts the detrimental effects of abiotic stress as opposed to higher levels (?10 ?M) where it acts as a pro-oxidant. We focused on both individual and interactive influence of selenate and sulphate on thiol metabolism in seedlings of rice cultivars, satabdi and khitish. Inhibition of ascorbate contents by about 17% on an average, in the test seedlings treated with Se correlated with increased activities of ascorbate peroxidase and ascorbate oxidase in the cultivars. The glutathione levels also increased significantly, on an average by about 102% in roots and 74% in shoots of cv. satabdi compared to a rise, by about 49% in roots and 56% in shoots of cv. khitish. The elevated level of glutathione coincided with the stimulatory influence of Se on its regulatory enzymes. Concomitantly the levels of ?-tocopherol and phytochelatins were also induced in both the test cultivars. Increase in ?-tocopherol activity reached a maximum by about 47% in roots and 80% in shoots of cv. satabdi whereas it increased by about 36% in roots and about 64% in shoots of cv. khitish. Substantive increase in the levels of PC4 followed by PC2 and PC3 was also noted. The effects were found to be less conspicuous in shoots than in roots. Rice seedlings exposed to combined Se and 10mM sulphate treatments showed improved growth and development as a result of better thiol metabolism due to amelioration of the adverse effects caused by selenium alone on all the parameters tested.

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