GENOTYPE-ENVIRONMENTAL INTERACTION IN ESSENTIAL OIL YIELD IN THE SELECTED CARAWAY TYPE 1.4.36.

Therefore, experiments including: /a/ different inter- and intrahill densities for competition, as well as /b/ four successive plantation with the difference of one month for response to intraseasonal fluctuations were established. The reaction to the interseasonal environments included the comparison of population means in earliness between the selected type and the base variety along six seasons.

The X² analysis of goodness of fit as well as for homogeneity of variance revealed conformity between the selected and the base variety populations, in response to interseasonal fluctuations with a correlation response again of six days in average days to first bloom. Competition experiments showed apparent degree of compensation among facets of essential oil yield. Generally, essential oil yield per hill expressed an average value of 0.23 over inter- and intrahill densities. The analysis of variance revealed no significant differences in the averages of yield facets due to intraseasonal differences. However, the ultimate essential oil yield expressed averages values of 0.38, 0.44, 0.50 and 0.22 g. due to successive plantations from mid September to mid December, respectively. Convariance, analysis revealed some developmental freedom in the selected type among yield facets due to high positive associations among them. The optimal expressivity of the genotype is discussed in view of genetic balance between stability and flexibility of yield facets.

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