Association and Path Coefficients Analysis on Some Yield Components in Soybean

FADUL ÖNEMLI
Thrace University, Tekirdag Agricultural Faculty, Field Crops Department, 59030 Tekirdag, Turkey

Abstract

ÖNEMLI, FADUL, 2003. Association and path coefficients analysis on some yield components in soybean. Bulg. J. Agric. Sci., 9: 339–342

23 soybean lines and 2 standard cultivars were used as material in this study conducted in 1994-1995 at Thrace University, Tekirdag Agricultural Faculty, Field Crops Department Research Area. In this study, 11 plant characters were observed. These are; plant height, number of branches per plant, the lowest pod height, number of pods per plant, shelling ratio, pod length, seed length, number of seeds per pod, 1000 seeds weight, seed yield per plant and hectare. The path and the correlations were determined using single plant values.
The yield per hectare varied between 1023.6–4228.8 and 1266.3–3944.0 kg during 1994 and 1995, respectively. The plant yield showed positive and significant correlations with number of pods, number of branches, pod length and 1000 seed weight for both years; with plant height, seed length, number of seeds per pod only during the first year. The correlations between seed yield per plant and the lowest pod height were significantly negative for both years. Number of pods maintained positive and significant correlations with plant height, number of branches, pod length, seed length, number of pods per plant and 1000 seeds weight while negative correlations with the lowest pod height. The lowest pod height had negatively significant correlations with number of seeds per pod, seed length and pod length.
Number of pods and 1000 seeds weight effected directly as positive on seed yield. The lowest pod height effected negatively via number of pod on yield. In addition in lateness lines for pod formation and their maturity, the total temperature during growing period was insufficient. As the results, the 11 high yielding soybean lines consequently selected for the demonstration of yield trial.

Key words: soybean, yield, yield components, correlation, path coefficient, selection criteria
Abbreviations: Pla. height – Plant height; Num. bran. – Number of branches per plant; Pod. heig. – The lowest pod height; Num. pods – Number of pods per plant; Shell. ratio – Shelling ratio; Seed leng. – Seed length; Num. seed. – Number of seeds per pod; 1000 seed W. – 1000 seeds weight (in Tables)