Research Article 
Determining Relationships Between Seed Yield and Yield Components in Alfalfa
Suleyman Sengul and Meryem Sengul
Pakistan Journal of Biological Sciences, 2006, 9(9), 1749-1753.
Abstract
Path analysis was performed on plant characters in spaced plants of land races alfalfa (Medicago sativa L.) to determine: seed yield per plant, stem number, internodes number, plant height, blooming periods, leaf length, raceme length, number of pods per raceme, number of seeds per raceme, number of seeds per pod, 00-seed weight. Positive relationships existed between seed yield and all its components with the exceptions of the internodes numbers, blooming periods and 1000-seeds weight. Significant correlation with seed yield was found for plant height, number of pods per raceme and the number of seed per raceme. Raceme length coefficient was highly significant (R = 0.786**), very high negative correlation found with the blooming periods (R = -0.625). Plant height, seeds per raceme, seeds per pods and 1000-seed weight had strong direct effects, while other components had strongly negative or negligible direct effects. The indirect effects via leaf length and blooming period were major determinants of the main effects of all components for the seed yield of the alfalfa. Positive direct effect of plant height, raceme length, number of pods per raceme and number of seed per raceme suggested that these yield components may be good selection criteria to improve seed yield of alfalfa cultivars.
ASCI-ID: 1-4103
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