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Estimation of outcrossing rates in Duglas-fir using isozyme markers


Tag. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik 62(2): 113-120
Estimation of outcrossing rates in Duglas-fir using isozyme markers
Seeds produced under open-pollination were collected from eight natural stands and a plus-tree seed orchard of Douglas-fir. These seeds were germinated and both diploid embryos and haploid gametophytes were analyzed by starch-gel electrophoresis. Eleven variable loci were resolved for both kinds of tissue and used as genetic markers for estimating outcrossing rates. Estimates made with single-locus and multilocus methods both indicated that the proportion of viable embryos resulting from outcrossing is about 0.90 for the natural stands, and for the seed orchard. Comparison of single-locus and multilocus estimates of outcrossing rates indicated that little or no inbreeding other than selfing occurred. Estimated outcrossing rates were higher for seeds from the upper portion of the crown than for seeds from the lower crown. It was also found that some trees selfed at a much higher rate than other trees.

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Accession: 053040920

PMID: 24270558

DOI: 10.1007/BF00293342



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