N. Gurunathan

Rajiv Gandhi University of Health Sciences

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P. Srimathi

Tamil Nadu Agricultural University

M. Paramathma

Tamil Nadu Agricultural University

A. Venkatesh

Indian Agricultural Research Institute

N. Mariappan

Tamil Nadu Agricultural University

Hari Sankhyan

Dr. Yashwant Singh Parmar University of Horticulture and Forestry

K. Rajarajan

Indian Council of Agricultural Research

S. Poobitha

Uma Shanmugasundaram

Emory University

Srishti Dhyani

Uttarakhand Ayurved University

K Krishnaveni

Swami Vivekanand College of Pharmacy

Cooperative Institutions

Tamil Nadu Agricultural University

Indian Council of Agricultural Research

Forest Research Institute

National Centre for Research

National Research Centre

Central Soil Salinity Research Institute

Sindh Agriculture University

Indian Institute of Soil and Water Conservation

Indian Agricultural Research Institute

Amrita Vishwa Vidyapeetham

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Prediction of seed storability of Jatropha curcas through accelerated ageing test

Indian journal of agroforestry (2012)

N. Gurunathan P. Srimathi A. Venkatesh

The study on prediction of seed storability was conducted in accelerated ageing chamber for the biofuel crop Jatropha curcas. It is revealed that the seed quality characters decreased with advances in ageing and the seeds lost their germination within 9 days indicating Jatropha curcas as a medium storer. There was a little varaiation in storage behaviour of different seed sources.

Jatropha curcas

Jatropha

Accelerated aging

Seed testing

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Evaluation on seed and seedling quality characters of Jatropha curcas.

Range Management and Agroforestry (2012)

N. Gurunathan P. Srimathi

Jatropha seeds collected from sixteen different locations were evaluated for physical and physiological seed quality characters including fruit set percentage for identification of suitable seed production area. It revealed that Odukkampalayam of Coimbatore district have got the potentiality for development as seed production area. The seeds of this location recorded higher seed and seedling quality characters including storability compared to other locations. In addition these seeds also found to posses higher seed to kernel ratio and higher oil content.

Jatropha curcas

Jatropha

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Age-age correlation models for early selection of Azadirachta indica provenances planted in semi-arid region

Indian journal of agroforestry (2012)

R. H. Rizvi V. K. Gupta N. Gurunathan Animesh Kumar Datta

An age-age correlation indicates the gain sacrificed to obtain the time advantage, a strong correlation implies that time advantage is met with a small reduction in absolute gain per cycle or vice-versa. A study was carried out to develop age-age correlation models, which could predict the phenotypic age-age correlations and determine the age of early selection. Ten years growth data of Azadirachta indica provenance trial on height and diameter at breast height (dbh) were compiled and analyzed in SYSTAT 11.0 software. Pearson correlation coefficients for tree traits viz. height, dbh and D2H (dbh2 x height) were computed between ages 5 to 10 years. Based on these age-age correlations, empirical models of the form rage, age = a + b LAR; where, LAR-Log (younger age/older age) and rage-correlation between two ages were fitted for all three traits. Empirical model based on ‘dbh ’was found best and thus used for estimating selection efficiency in terms of gain per unit time. It suggested that for the plantation age 9 and rotation period of 30 years, the selection efficiency comes out to be 1.179, which means selection at 9 years would yield 1.179 times more gain than selection at age of 30 years. Correlation between 7 & 9 years was significantly high (r=0.829, p<0.05) in case of ‘dbh ’, thus A. indica provenances may be selected at an early age of 7 years on the basis of this trait in semi-arid region.

Genetic gain

Genetic correlation

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Influence of seed pelleting treatment on seedling quality characteristics of Bambusa Bambos

Journal of Non Timber Forest Products (2010)

K Krishnaveni P. Arulrajan N. Gurunathan M. G. Rao

Studies conducted with Bambusa bambos on evaluation of seed pelleting treatment for production of quality seedling revealed that seed pelleting with Azospirillum @ 50 g kg-1 has improved the germination (74%) of the seed both at laboratory and at nursery up to the evaluation period of three months. Same way all the seed and seedlings quality parameters showed superior performs with Azospirillum than others with control both at laboratory at nursery.

Bambusa

Seed treatment

10.54207/bsmps2000-2010-33d899

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Influence of Seed Priming on Production of Quality Seedlings in Jatropha curcas

Indian Forester (2009)

N. Gurunathan P. Srimathi M. Paramathma K. T. Parthiban K.P.N. Kumaran

Studies made with Jatropha curcas on seed priming with different growth regulators, temperatures and durations with the constant seed to solution ratio of 3:2 revealed that priming with IBA 200 ppm at ambient temperature for a duration of 12 to 24 h enhanced the quality characters of Jatropha seedling raised at nursery to evaluate its performance in production of quality seedlings.

Jatropha curcas

Priming (agriculture)

Jatropha

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Influence of seed fortification treatment with organic nutrients on seedling production in Jatropha curcas (L.).

Green Farming (2008)

N. Gurunathan P. Srimathi M. Paramathma

Jatropha curcas

Jatropha

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Influence of storage containers on seed storability of Jatropha curcas.

Mysore Journal of Agricultural Sciences (2011)

N. Gurunathan P. Srimathi M. Paramathma

Jatropha curcas

Jatropha

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Estimation of phenotypic, genotypic and environmental correlation coefficients of different morphological characters in Grewia laevigata Vahl.

Mysore Journal of Agricultural Sciences (2011)

N. Mariappan Hari Sankhyan N. Gurunathan

Grewia

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Performance of different accessions of Pongamia pinnata.

Indian Forester (2014)

N. Gurunathan Sonika Ahlawat K. Rajarajan

Pongamia pinnata is one of the most promising tree borne oil seed species. Ten better performing accessions mainly based on fruiting were evaluated. Uniform size semi-hardwood cuttings were made and were treated with IBA @ 600 ppm. The cuttings were measured, after 75 days of planting for root length, shoot length, collar diameter, fresh weight and dry weight. The shoot length, collar diameter, fresh weight and dry weight had shown significant difference between the sources. Broad sense heritability was highest for rooting (99.58%) followed by fresh and dry weight. Fresh weight showed high genetic advance. The sources Mundara (Tikamgarh) and Khadauli (Agra) performed better in terms of dry matter production as well as rooting.

Pongamia

Cutting

Dry weight

Collar

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Influence of size polymorphism on seed and seedling quality of Jatropha curcas.

Madras Agricultural Journal (2009)

N. Gurunathan P. Srimathi M. Paramathma

Jatropha curcas

Jatropha

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Citations (8)