Evaluation of Alternate Rice Variety for Replacement of BPT 5204 Suitable for Samba Season in Southern Zone of Tamil Nadu

2017 ◽  
Vol 6 (1) ◽  
pp. 227
Author(s):  
M Kathiravan ◽  
C Vanitha
Keyword(s):  
Tamil Nadu ◽  
Rice Variety ◽  
Southern Zone

scholarly journals Risk Behavior of Farmers Cultivating Traditional Rice Varieties in Erode District, Tamil Nadu

2021 ◽  
pp. 349-357
Author(s):  
G. Kaviya ◽  
A. Vidhyavathi ◽  
S. Padma Rani ◽  
M. Nirmala Devi
Keyword(s):  
Risk Behavior ◽  
Tamil Nadu ◽  
Rice Variety ◽  
Soil Health ◽  
Risk Attitude ◽  
Farm Income ◽  
Rice Varieties ◽  
Natural Risk ◽  
Small Areas ◽  
Traditional Rice

This study investigates the risk behavior of traditional rice variety growers in Erode District of Tamil Nadu state, using Moscardi and De Janvry approach and Discriminant analysis technique. A well structured questioner was prepared and purposive random sampling was done in three blocks which covers highest cultivable area under paddy namely Gobichettipalayam, Modakurichi and Bhavani in Erode district. Each traditional rice varieties have some unique characteristics i.e some are pest and disease resistant, drought resistant, resistant to waterlogged condition and have medicinal values. The present study was done to identify the major risks, to quantify the risk attitude and to identify the factors influencing risk attitude of the traditional variety growers in Erode District. In the research it was found that the varieties preferred by farmers were Thuyamalli, Kichadi samba, Karuppukavuni, Mapillai samba,Arcaud Kichadi Samba, Poongar, Thanga Samba, Sivan Samba and few other varieties they were cultivating in small areas using organic farming method.The major risk found in cultivating traditional rice varieties were market risk followed by human labour risk, processing risk, input risk, technology risk, institutional risk, natural risk and other risks include transport risk and storage risk. The farmers were grouped into three categories i.e., risk preferrers (63.33 per cent), risk neutral (28.33 per cent) and risk averse (8.33 per cent) based on risk attitude. Once again the farmers in each group was categorized into low, medium, high risk based on nine factors namely, farmers age, major occupation, years of schooling, family size, membership in any of the farmers association, proportion of paddy area to total farm area, proportion of paddy income to total farm income, experience and adequacy of market which were influencing the risk attitude of farmers. In order to conserve the traditional rice varieties from extinction, to restore the soil health, to ensure nutritional security the farmers were willing to take risk.

scholarly journals Rainfall Stability and Drought Valuation (Using Spi) Over Southern Zone of Tamil Nadu

2015 ◽  
Vol 10 (3) ◽  
pp. 923-933
Author(s):  
A.P Ramaraj ◽  
S Kokilavani ◽  
N Manikandan ◽  
B Arthirani ◽  
D Rajalakshmi
Keyword(s):  
Tamil Nadu ◽  
Standardized Precipitation Index ◽  
Extreme Drought ◽  
Northeast Monsoon ◽  
Weather Extremes ◽  
Monsoon Period ◽  
Spi Index ◽  
Southern Zone ◽  
Annual Range ◽  
Moderate Drought

Drought is the most extensive hydro-meteorological pattern of prolonged period of water scarcity affecting natural resources and environment. However, it has significantly different characteristics from one region to another. Tamil Nadu agonizes from various disasters including droughts. Generally rainfall deviation from the long-term mean continues to be a widely adopted indicator for drought intensity assessment. The application of this indicator is strongly limited by its inherent nature of its dependence on mean. Thus a standardized procedure that overcomes these limitations becomes a basic need. Moreover stability of rainfall in recent years has been erratic and hence to understand the stability of rainfall over years Precipitation Ratio (PR) was used. Further to understand the drought climatology of southern zone of Tamil Nadu, Standardized Precipitation Index (SPI) was used. PR was studied for three decades (1981-2010) covering seven locations. In most of the locations the rainfall was stable during 1981-90 and thereafter a gradual decline in stability was noticed confirming the weather extremes in the recent decade. SPI had an annual range from +2.69 to -4.94 while Monsoon period had +2.41 to -3.43 and +2.69 to -3.14 respectively for Southwest and Northeast monsoon seasons. As per SPI index, Southern zone is prone to moderate drought followed by severe and extreme drought category. Among the periods studied (Annual, SWM and NEM) number of moderate drought occurrences had no much variation while in severe and extreme drought category, variations could be observed. In particular, during NEM period there was almost no occurrence of extreme drought.

Genetic diversity analysis and metabolite profiling of pharmaceutical value Indigenous rice varieties of Tamil Nadu (Oryza sativa Linn.)

2021 ◽  
Vol 23 (10) ◽  
pp. 447-464
Author(s):  
Rajalakshmi Settu ◽  
◽  
Jayanthi Balakrishnan ◽  
Sarathi Kannan Dhavamani ◽  
Manoj Srinivas Ravi ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Tamil Nadu ◽  
Random Amplified Polymorphic Dna ◽  
Rice Variety ◽  
Resolving Power ◽  
Bioactive Metabolites ◽  
Similarity Coefficients ◽  
Rice Varieties ◽  
Indigenous Rice Varieties

Evaluation of local indigenous medicinal rice (Oryza sativa Linn.) varieties using molecular and metabolic profiling plays dynamic role for unravelling the genetic variability and restorative bio actives. In the present study, 18 screened random decamer (RAPD) markers were used to analyze genetic diversity and relationship among 25 indigenous landraces and 1 commercial rice varieties (White ponni), and GC-MS profiling of phylogenetic clusters positioned 4 random indigenous rice varieties and 1 White ponni rice were documented for exploring bioactive metabolites. Random amplified polymorphic DNA (RAPD) analysis of twenty-six rice varieties of Tamil Nadu divulges significant genetic differentiation. The primers produced total of 92 bands with size ranges from 100-8500bp out of 74 were polymorphic bands indicating 80% polymorphism. The mean values of RAPD for polymorphism information content (PIC) of 0.268, effective multiple ratio (EMR) of 23.38, marker index (MI) of 7.39 and the resolving power (Rp) of 4.34. The primer OPA-02, OPD-08, OPF-13 produced maximum number of bands (8), OPAA-07 produced minimum number of band (2). The UPGMA dendrogram were constructed based on Jaccard’s similarity coefficients. The dendrogram resolved the indigenous rice varieties into 3 main clusters and 3 monoclades ranged from 0.467 to 0.860, commercial rice variety shows marginal ungrouped position of 1. In the 3-main clustering, based GC-MS profilling (methanol and acetone rice bran extracts) of Karuppu Kavuni, Karuthakar, Kottara samba, Kaivara samba and ungrouped position of White ponni revealed 88 distinctive bioactive metabolites. And profiling results substantiate that the traditional rice varieties hold promising therapeutic metabolites for sedentary lifestyle disorders.

scholarly journals Diversity of parasitic fauna of conventional rice ecosystem during kuruvai season at Annamalainagar, Tamil Nadu

2019 ◽  
Vol 11 (1) ◽  
pp. 164-167
Author(s):  
C. Kathirvelu
Keyword(s):  
Biological Control ◽  
Natural Enemies ◽  
Tamil Nadu ◽  
Uv Light ◽  
Rice Variety ◽  
Light Trap ◽  
Malaise Trap ◽  
Parasitic Fauna ◽  
Wide Range ◽  
Rice Ecosystem

Arthropod natural enemies are often vital biological control agents of various insect pests of rice ecosystem which include a wide range of predators and parasitoids. Determining the natural enemies and biodiversity of rice fields is the first step to success in biological control and IIPM (Integrated production and pest management) programmes. In the present study, there were four methods of collection viz. sweep net, Malaise trap, UV light trap and yellow pan trap were used to gather parasitoids from ADT-36 rice variety during Kuruvai season (June - September) in 2012. The rice variety was cultivated following the conventional practices like application of inorganic manures, pesticides, micronutrients etc., The results of the diversity of parasitic fauna of conventional rice ecosystem revealed that a total of 889 parasitoids were collected through net sweep, 631 in Malaise trap, 534 in yellow pan trap and 308 in UV light trap during Kuruvai, 2012. Thirteen different agriculturally important parasitic families were collected and identified. Among the families collected, Ichneumonidae, Braconidae, Scelionidae and Chalcididae were found predominant.  Dryniidae was recorded only in yellow pan trap. Among the collection methods employed, Net sweep was found to be the best in collection of parasitoids than other methods in conventional rice ecosystems.

scholarly journals TNAU Rice CO 51 (IET 21605)-A high yielding short duration fine grain rice variety for Tamil Nadu

2019 ◽  
Vol 10 (2) ◽  
pp. 324
Author(s):  
S. Robin ◽  
K. Mohanasundaram ◽  
S. Manonmani ◽  
S. Rajeswari ◽  
P. Jeyaprakash ◽  
...  
Keyword(s):  
Short Duration ◽  
Tamil Nadu ◽  
Rice Variety ◽  
Fine Grain
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