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Agricultural Journal
Year: 2007  |  Volume: 2  |  Issue: 6  |  Page No.: 697 - 701

Step Wise Regression and Path Analyses of Dry Matter Accumulation in the Vegetative and Reproduction Parts of Soybeans (Glycine max [L] Merr)

O.T. Adeniji    

Abstract: Studies on accumulation rate, association and stepwise regression of agronomic character to pod and seed yield were carried out among cultivars of soybeans. Field experiment was laid out in a randomized complete block design with a split plot arrangement and replicated 3 times. The cultivars were allocated to the main plot, while the stages of maturity were allocated to the sub plot. Representation samples were analyzed for accumulation of photostynthate in the shoots roots and seeds as affected by the stages of maturity. The result indicated a significant difference for pod length, plant height, dry shoot weight dry pod wall weight and dry weight as affected by the stage of maturity. The accumulation of photosynthate in the seed was highest (3.151.69) in Tgx 923-2E. A positive correlation between seed weight and number of branches, pod number per plant and pod wall weight, suggests that these characters may be components for improvement in seed yield. The stepwise multiple regression analysis identified the pods per plant to have accounted for 96% of variability for seed weight. The seed weight contributed 96% of the total variation observed for pod yield. The number of pods per plant recorded the highest positive direct effects on weight. This study identified the number of pods per plant as important character for pod yield improvement in soybeans.

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