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Joint International Conference on Long-term Experiments ...

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Regarding the species, the best embryogenic ability was found in Q. petraea and the<br />

worst, in Q. frainetto. The embryogenic ability of Q. robur (average, 17,8%) and Q.<br />

petraea (av. 18,5%) was similar, but that of Q. frainetto was significantly inferior<br />

(average 10,4%).<br />

C<strong>on</strong>cerning provenances, in Q. robur, the best results were obtained in the<br />

provenance Tg. Mures (av. 22,9%) and the worst, in Dumbrava Sibiului (av. 12,9).<br />

Between the Q. frainetto provenances, Griva was superior (av. 12,5%), and Padurea<br />

sarului was the worst (average 8,3%).<br />

Statistical analyses in two ways Anova system were made in order to validate the<br />

correlati<strong>on</strong>s between the effect of genotype and developmental stage.<br />

% embryogenic inducti<strong>on</strong><br />

25<br />

20<br />

15<br />

10<br />

5<br />

0<br />

genotypes<br />

average<br />

Tg.Mureş Dumbrava Sib. Stefanesti Mihaesti Griva Pad.Sarului<br />

Q. robur Q. petraea<br />

Q. frainetto<br />

genotypes<br />

Fig. 6 - The effect of the genotype (species, provenances) up<strong>on</strong> the<br />

embryogenic ability in oak<br />

The effect of culture medium proved to be totally insignificant, besides the differences<br />

observed am<strong>on</strong>g the variants cultivated <strong>on</strong> different media. The situati<strong>on</strong> was the same<br />

as well for the nutrients as for growth regulators<br />

In order to discriminate the role of each factor up<strong>on</strong> the efficiency of embryogenic<br />

inducti<strong>on</strong>, three-ways Anova statistical analyses were performed.<br />

2. STATISTICS<br />

2.1. Trifactorial experiments<br />

2.1.a. The effect of provenance, stage of explant and culture medium up<strong>on</strong> the embryo<br />

inducti<strong>on</strong> efficiency in Quercus robur<br />

The three way Anova for the effect of provenance, stage of explant and culture medium<br />

up<strong>on</strong> the embryo inducti<strong>on</strong> efficiency in Quercus robur is presented in the Table 1.<br />

446

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