Path analysis of maize(Zea mays) morphological traits | Analiza putanje morfoloških osobina kukuruza (Zea mays)
2010
Pavlov, J., Institut za kukuruz Zemun Polje, Beograd - Zemun (Serbia) | Delić, N., Institut za kukuruz Zemun Polje, Beograd - Zemun (Serbia) | Filipović, M., Institut za kukuruz Zemun Polje, Beograd - Zemun (Serbia) | Čamdžija, Z., Institut za kukuruz Zemun Polje, Beograd - Zemun (Serbia) | Šurlan-Momirović, G., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Živanović, T., Poljoprivredni fakultet, Beograd - Zemun (Serbia)
In this study, 15 hybrids out of dialel cross of 6 maize inbred lines from the same heterotic group (empirical) have been examined. The aim was to assess the direct and indirect impact of five maize morphological traits on maize grain yield, using path coefficient analysis (Edvards, 1979). Statistical processing is done by MS Excel 2007th. Most of the calculated correlation coefficients between independent variables were in the range of significant mathematical interdependence (Petz, 2004). The simple correlation coefficients between morphological traits were used to form a symetric correlation matrix (Rij) out of independent variables (5x5). Multiplying the inverted matrix Rij (R-1ij) by the vector Ryi (correlation coefficients of grain yield with independent variables), resulted path coefficient (P′yi) values. Direct effects of independent traits on grain yield were tested by standard error of regression coefficient (Sb′i), using F-test. Number of leaves above top ear has shown the strongest direct positive effect on grain yield, with a statistically significant value of 0.752*. Direct influence of other traits was beyond statistical significance. Indirect influence on grain yield, distinguishes the positive effect of the ear insertion heigh over total plant height. Rating proportion of joint action of five examined morphological traits on grain yield, expressed by multiple coefficient of determination (R2y12345) amounted to 0.5789.
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