Mating Pattern and Empty Seed Formation in Relation to Crown Level of Larix Decidua (Mill.) Clones

1991

14 Lit. Ang.

Unselbständiges Werk

2767

200040869

The mating system was analyzed in the upper and lower crown of two groups of European larch clones divided according to the percentage of full seeds in the upper and lower crown parts. The overall multilocus estimate of outcrossing rate (t) was calculated to be 0.929. The differences of outcrossing rates between crown levels and clonal groups respectively were not statistically significant. The t estimates were greater for the upper level and for clones with higher percentage of full seeds in the upper crown level. However, among all observations there was no correlation between outcrossing rates and percentages of full seeds for particular crown levels and groups of clone. Observed similarity of outcrossing among grafts of the same clones may indicate genetic control of self-fertilization rate in individual European larches.