Agepati Sivasankar

Acharya NG Ranga Agricultural University, Guntur, Andhra Pradesh, INDIA

Forty five hybrids were generated from crossing fifteen lines with three testers in line × tester design. The hybrids along with parents were evaluated for yield and yield component traits to study combining ability and gene action in maize. The general combining ability (gca) and specific combining ability (sca) were significant for all the charac...

A set of 76 rice genotypes were subjected to Mahalanobis D 2 analysis to assess genetic diversity among them. All these genotypes were grouped into nine clusters with maximum inter cluster distance between cluster VI and cluster IX (5805.13) and minimum inter cluster distance was observed between cluster I and cluster II (374.05). Among the ten cha...

A field experiment was conducted at College Farm, College of Agriculture, ANGRAU, Rajendranagar, Hyderabad during rabi 2009-10 to study physiological and biochemical changes associated with biomass production in 12 sunflower genotypes under moisture stress. Moisture stress treatment was imposed at flower bud initiation stage (irrigation withheld fr...

A study was conducted to screen twenty nine sunflower genotypes for tolerance to drought under field conditions based on morpho - physiological characteristics. Moisture stress treatment was imposed at flower bud initiation stage (irrigation withheld for 20 days from 40 DAS to 60 DAS) where as, control plots were irrigated at 10 days intervals thro...

Despite Indian nigella being widely used in various herbal preparation across the world, the composition of volatile fraction and seed metabolite content has been poorly investigated. The nigella crop was raised in Coastal Humid Tropics of Andhra Pradesh and the seed collected was used for chemoprofiling. The extraction was done with MTBE solvent f...

To investigate the effect of water stress on relative water content, antioxidant enzymes (Superoxide Dismutase activity and Peroxidase) and membrane leakage in twelve genotypes of sunflower a study was conducted during rabi, 2010-11 at College Research Farm, ANGRAU, Hyderabad. Water stress was imposed at flower bud initiation stage by withholding w...

Fennel (Foeniculum vulgare Mill.) is widely used spice both in oriental and occiendental culinary. The grains are used as spice where as the herb is used as a herb and vegetable. The crop is grown mostly northern part of India, however, it is well suited in the southern peninsula. In the present investigation, ninety genotypes were evaluated along...

Nigella is a very important medicinal spice gaining importance recently. It is used in different ethnomedicine systems for its intrinsic curative effects. The seed is employed in various forms i.e. whole seed, seed powder, fixed and essential oil extracted from seed. India is the largest exporter of nigella (Nigella sativa L.). It is exported to 54...

The study provides information on nigella production economics in Andhra Pradesh, India.

The study gives information on time of sowing and plant density of nigella in Andhra Pradesh, India.

Nigella (Nigella sativa L.) belongs to the family Ranunculaceae, the butter cup family. The plant is regarded highly in unani, ayurveda, siddha and other ethnomedicine systems. The pressed seed oil is used as topical and oral medical applications. In two separate studies conducted, the changes in the fatty acid profile of nigella seed were determin...

An experiment was conducted to study the correlation and path analysis for eleven characters of maize on 45 F1S, their 18 parents (15 lines and 3 testers) along with two standard checks raised during kharif, 2011. Grain yield was found to be significantly and positively correlated with plant height, ear height, ear girth, number of kernel rows per...

A field experiment was conducted to evaluate the influence of integrated nutrient supply on the Bt. cotton (Gossypium hirsutum L.) hybrid 'Mallika' during kharif season of 2009 and 2010 at the Agricultural Research Station Adilabad in Andhra Pradesh. The results showed that the leaf area, dry matter, bolls/plant and seeds/boll increased significant...

A field experiment was conducted with andrographis in the existing plantations of amla and terminalia at College of Agriculture, Rajendranagar, Hyderabad during kharif seasons of 2008 and 2009 to study the feasibility of medicinal plants under shade. Shade-tolerant and rhizomatic MAPs can be grown on a long-term basis in widely spaced plantations (...

The estimates of the components of genetic variation were worked out by Kempthorne method from a Line x Tester analysis in castor for fourteen plant type related traits. The analysis for combining ability revealed significant mean sum of squares of both general combining ability (GCA) and specific combining ability (SCA) for all the characters whic...

A study was conducted to screen twenty nine sunflower genotypes for tolerance to drought under field conditions based on morpho - physiological characteristics. Moisture stress treatment was imposed at flower bud initiation stage (irrigation withheld for 20 days from 40 DAS to 60 DAS) where as, control plots were irrigated at 10 days intervals thro...

Fifty genotypes of sunflower (Helianthus annuus L.) were screened for seedling traits such as germination percentage, root length, shoot length, root to shoot length ratio and seedling dry weight for drought tolerance under laboratory conditions using PEG-6000 during 2008. Two levels of osmotic stress (-0.3 MPa and -0.9 MPa) were created and perfor...

Two wheat genotypes viz. Uniculm ‘gigas’ (VI) and Kalyansona (V2) were raised till maturity with low (N1) and adequate (N2) nitrogen levels supplied at 30 and 120kg ha−1, respectively. Laminae, numbering 1–8 on the main shoot, were examined for various parameters at weekly intervals from emergence through senescence. N1 resulted in gradual reductio...

Two wheat genotypes, viz. Uniculm ‘Gigas’ (V1) and Kalyansona (V2) were raised to maturity under two levels of nitrogen supply @ 30 (N1) and 120 (N2) kg ha−1, under pot culture conditions. Laminae numbering 1 to 8 on the shoot were examined for area, net photosynthetic rate (Pn) and mesophyll cell characteristics, at full expansion. N1 resulted in...

A field experiment was conducted at Regional Agricultural Research Station, Jagtial, Andhra Pradesh, during the rainy seasons of 1995, 1996 and 1997, to find out the appropriate row ratio and plant population proportion of maize (Zea mays L.) and soybean [Glycine max (L.) Merr.] intercropping system under rainfed conditions of northern Telangana, A...

Application of 10 mM urea to the flag leaf of wheat plants enhanced in vivo urease activity several fold. Photosynthetic rate was also increased considerably. There were significant differences in the leaf internal carbon dioxide (CO2) concentrations between the urea‐treated and untreated leaves. The finding that carbon (C) was detected in the etha...