Vergers à graines de Douglas : le cru 1987

Contribution à l'étude de la virémie chez le mouton Inoculé avec le virus de la Fièvre Aphteuse.

X98-019.CHP:Corel VENTURA

The impact of increasing the number of crosses per parent (k) on the efficiency of roguing seed orchards (backwards selection, i.e., reselection of parents) was examined by using Monte Carlo simulation. Efficiencies were examined in light of advanced-generation Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) tree improvement programs where information is available from previous generations, ...

Pollen contamination trends in a maturing Douglas-fir seed orchard

Pollen contamination was investigated in one block (block 4) of a 10-block Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seed orchard complex in western Oregon. Blocks (25 clones each) represent different breeding zones; thus, contaminant pollen sources not only included the adjacent natural stand of Douglas-fir, but also other blocks within the orchard complex. Stored seed lots from five ...

Le corps à la renaissance. Actes du XXXe Colloque de Tours 1987

"Biblical geology"-which could hardly be the object of experimental investigation. Yet Marie Boas Hall takes into consideration only the actual performance of real experiments and explicitly declines to take into account "the presentation of random empirical facts, fancies or thoughts" (p. 5). She begins with a discussion of the original aims of the founders, and, subsequently, of the several s...

Flower stimulation in young miniaturized seed orchards of Douglas-fir (Pseudotsuga menziesii)1

We studied flower stimulation in two young miniaturized seed orchards of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) in Oregon. In experiment 1, female and male flowering were substantially enhanced when the trees were treated 2–4 years after grafting with stem girdling plus stem-injected gibberellin A4/7 (GA 0.25× rate = ProConeTM at 0.084 μL·mm–2 scion cross-sectional ar...