Agrotechnology

Correlation and path coefficient analysis on seed yield in sunflower

2^nd International Conference on Agricultural & Horticultural Sciences

Radisson Blu Plaza Hotel, Hyderabad, India February 03-05, 2014

Venkata R Prakash Reddy, H L Nadaf and A G Vijayakumar

Posters: Agrotechnol

Abstract:

An investigation was undertaken to assess the correlations among yield related characters of sunflower and to verify their direct and indirect effects which will be used for the selection for seed yield. 48 hybrids, 16 parents and four checks were laid in a randomized block design with two replications. Twelve characters were collected and analyzed for correlations and path coefficients. The results showed that the seed yield per hectare was strongly correlated with the seed yield per plant, head diameter, plant height and test weight. Positive correlations were found between seed yield per plant with oil content, head diameter, plant height and test weight and also between oil content with plant height. A highly negative correlation found between percent disease index (PDI) at 45, 60 and 75 days after sowing with seed yield per hectare, head diameter, days to 50% flowering and days to maturity. The seed yield per plant showed the highest positive direct effect on seed yield per hectare followed by the head diameter. For Alternaria disease reaction, percent disease index (PDI) at 45,60 and 75 days after sowing exhibited negative direct effects. Beside this, oil content, plant height and days to 50% flowering also exhibited negative direct effects. In addition, indirect effects of most characters were high through seed yield per plant and head diameter. Therefore, seed yield per plant and head diameter should be used in the selection for seed yield in sunflower.

Biography :

Venkata R Prakash Reddy completed his M.Sc. at the age of 24 years from University of Agricultural Sciences, Dharwad under the guidance of Dr. H. L. Nadaf. In M.Sc. he worked on Genetic analysis of seed yield and its component traits and Resistance to Alternaria blight in sunflower ( Helianthus annuus L .). Now he is doing Ph.D. on Molecular mapping of culm strength related QTLs in rice in Acharya N. G. Ranga Agricultural University, Hyderabad.