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Karmel Reetha A.,Vanavarayar Institute of Agriculture | Lalitha Pavani S.,Andhirapradesh Rice Research institute | Mohan S.,Tamil Nadu Agricultural University
Journal of Biopesticides | Year: 2014

Sunflower (Helianthus annus L.) is one of the most important oil seed crops grown all over the India. Charcoal rot caused by Macrophomina phaseolina is a major disease causing severe yield loss upto 52 per cent.The pathogen invasion occurs from the seedling to maturity stage. To overcome these problem In vitro, sensitivity of M. phaseolina determined through inhibition zone technique to seven isolates offungi antagonistic viz.,Tv1, ETv2, EDTv3, ATv4, CTv5, MTv6andKTv7amended into PDA medium on seven days after inoculation. All the antagonists reduced the colony growth of M. phaseolina significantly compared to the control. Among this isolates Tv1 was effective (74.12%) in reducing the colony growth of M. phaseolina followed byCTv5(68.39), EDTv3 (48.36)respectively over control. © 2014, JBiopest. All Rights Reserved.

Hariprasath B.,Vanavarayar Institute of Agriculture
Asian Journal of Pharmaceutical and Clinical Research | Year: 2012

Molecular docking was carried out against two target proteins which are helpful for MRSA infection with the help of accelrys discovery studio to understand the applicability of the method to differentiate between the active and inactive compounds. Molecular docking of thirty two structurally diverse inhibitors were carried out and it was observed that though some false positives were also obtained; considering the limitations of the available docking programs, the results were promising. The high molecular weight compounds with heterocyclic rings showed very low binding energy, but did not comply with Lipinski's rule. The active constituents that were docked with the protein are Baicalein, Biochanin, Carnosol, Genistein, Orobol, Resveratrol, Rhein, Gallic acid, Pyrithione, Resveratrol and Linozolid. The compound Orobol was found to interact more towards the target protein like showing highest Dock score.

Kumar S.R.,Vanavarayar Institute of Agriculture
International Journal of Vegetable Science | Year: 2016

Though Bottle gourd [Lagenaria siceraria (Molina) Stand] has a wide range of genetic variability, very little attention has been paid to its genetic improvement and commercial cultivation. Investigations were carried out to assess the breeding value of parental lines by combining ability analysis with the Line × Tester method to understand the usefulness of heterosis breeding to develop F1 hybrids for commercial cultivation. Nine lines and four testers were crossed to produce 36 hybrid combinations. The parents and hybrids were evaluated for growth and yield characters. There were differences among hybrids and parents for all characters. Variance associated with lines indicated significant differences for all characters except days to first male flower anthesis, number of seed per fruit, and 100 seed weight. For testers, variances exhibited significant differences among genotypes except for vine length, days to first male flower anthesis, days to first female flower anthesis, sex ratio, fruit width, fruit flesh thickness, number of seed per fruit, 100 seed weight, and yield per plant. The variance due to the interaction between lines and testers was significant for all characters except node at first female flower anthesis. The specific combining ability (sca) variances were greater than general combining ability (gca) variances and the ratio of gca/sca variances did not exceed unity, indicating the predominance of nonadditive gene action for all traits. Mean performance and gca effects of parents indicated the superiority of the lines Punjab Long, Kalyanpur Long Green, and Pusa Naveen and testers NDBG-164 and Samrat for most yield attributing characters. Based on mean performance, heterosis and sca effects, hybrids from the crosses ‘Pusa Naveen × NDBG-164’, ‘Pusa Naveen × Punjab Komal’, and ‘NDBG-121 × Samrat’ could be promising for commercial exploitation of fruit yield in F1 hybrids. Number of fruit per vine and fruit flesh thickness were significantly and positively correlated with yield. From path analysis, number of fruit per vine, days to first male flower anthesis, fruit cavity size, fruit weight, days to first fruit harvest, and total soluble solids (TSS) were identified as reliable components of yield and exerted positive, direct effects on yield. When selecting the best hybrids for yield in bottle gourd, more emphasis should be given to number of fruit per vine, fruit flesh thickness, days to first male flower anthesis, fruit cavity size, fruit weight, days to first fruit harvest, and TSS. © 2016 Taylor & Francis

Kumar S.R.,Vanavarayar Institute of Agriculture | Arumugam T.,Agricultural College and Research Institute | Balakrishnan S.,Agricultural College and Research Institute | Anandakumar C.R.,Agricultural College and Research Institute
Pakistan Journal of Biological Sciences | Year: 2013

In the past, very little efforts have been taken for development of inbred lines of brinj al through the exploitation of genetic variability present in the exotic hybrids. F2 generation obtained from the selfing of F1hybrid provides all possible variations. So, selection with particular objectives in F2 generation is very much effective and selfing of those selected genotypes generation after generation helps to develop inbred lines (similar to the parental lines of the exotic hybrids). These inbreds with desired characters including high yield potential can be used as High Yielding Variety (HYV) as well as the parents for hybrid variety. To increase the genetic yield potential, the maximum utilization of the desirable characters for synthesizing of any ideal genotypes is essential. Variability in brinjal is expected to be immense as the fruits vary greatly in shape and size. The present investigation was undertaken at Department of Horticulture, Agricultural College and Research Institute, Madurai during 2011 to determine variability in segregants of eggplant (Solanum melogenaL.). The crosses L5×T4 (PalameduLocal×EP 65) andL4xT1 (Alagarkovil Local×Annamalai) had the highest mean with high variability for individual fruit weight and fruit yield per plant. These crosses were best for using as a base population for further improvement in fruit yield and fruit weight as they had high heritability and genetic advance. Favorable low mean with high variability occurred for days to first flowering (earliness) in the crosses L5×T2 (Palamedu Local×KKM 1) and L4×T2 (Alagarkovil Local×KKM 1). Direct selection may be executed considering these genotypes for selection towards the development of early in flowering and high yielding brinjal variety. © 2013 Asian Network for Scientific Information.

Jaisridhar P.,Vanavarayar Institute of Agriculture | Sankhala G.,National Dairy Research Institute | Kadian K.S.,National Dairy Research Institute | Kumar S.,National Dairy Research Institute | Sangeetha S.,Tamil Nadu Agricultural University
Pakistan Journal of Agricultural Sciences | Year: 2013

Scientific dairy farming in India is gradually being adopted by farming community due to the overriding effect on increased milk yield. This study examined the socio economic determinants of dairy farmers and their relationship with adoption of scientific dairy farming practices in Tamil Nadu State, South India. Data were collected from 150 randomly selected respondents in the study area and was analyzed using Statistical Package of Social Science (SPSS) software. The results revealed that education status, herd size, frequency of contact, information utilization pattern and information seeking behaviour are significantly correlated with the scientific dairy farming among dairy farmers of Tamil Nadu. It was recommended that adequate awareness should be created by the State Agricultural Department to generate the interest of farmers towards the use of instant information sources like Farmer's Call Centre (FCC) for clean milk production and enhanced milk yield. Efforts should also be made to strengthen the centre with trained staffs and advanced communication facilities like tele and video conferencing so that a reasonable number of farmers can be reached with scientific dairying information.

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