A study of variability of alfalfa yield components using principle component analysis
2007
Milic, D., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia) | Katic, S., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia) | Vasiljevic, S., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia) | Karagic, Dj., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia) | Mikic, A., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia)
The aim of this paper was to examine the genetic divergence of 30 alfalfa genotypes. The study carried out at Rimski Sancevi (Serbia) during 2001-2003 and included seven cuts. Genotype variability was analyzed using eight quantitative traits, namely green forage yield, dry matter yield, plant height, shoot (stem) number per plant, internode length and number, leaf contribution to yield, and stem diameter. Principal component analysis was used to determine the structure of the sources of variability. Four principal components explaining 95.5% of the genotype variability were chosen for interpretation. The greatest communality with the first principal component was found for internode length, plant height and leaf contribution to yield, which were all highly interdependent. The second principal component was defined by the agronomically most important traits, namely green forage yield, dry matter yield and stem number per plant. The third and fourth principal components were defined by internode number and stem diameter.
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