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Challenges facing Chamaecyparis nootkatensis seed orchards: Low seed production, pollen-cone abortion, self-pollination, and accelerated embryo development

Canadian Journal of Forest Research, ISSN: 0045-5067, Vol: 32, Issue: 8, Page: 1411-1419
2002
  • 14
    Citations
  • 0
    Usage
  • 12
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    14
    • Citation Indexes
      11
    • Policy Citations
      3
      • 3
  • Captures
    12

Article Description

Seed orchard production of Chamaecyparis nootkatensis (D. Don) Spach seed faces several challenges including low seed production, pollen-cone abortion, self-pollination, and accelerated reproductive development. In a seed orchard study in 1988 and 1989, approximately eight seeds were produced per cone, but only one to three seeds per cone contained viable embryos. Pollen-cone abortion in 21 clones ranged from 6 to 87% in 1989-1990 and from 0 to 6% in 1990-1991. A bud mite, identified as Trisetacus chamaecypari Smith, was consistently associated with pollen-cone abortion in two orchard locations. This mite may be the cause or simply a symptom of unhealthy pollen cones. In a pollination study involving wind, self, and cross pollinations on five clones, self-pollinated cones had significantly fewer seeds containing embryos (4%) compared with the other treatments (28-33%). Pollen-cone development at a seed orchard occurred in July and August 1990 and was comparable with natural stand phenology. However, embryo development was significantly accelerated, with embryos at a seed orchard substantially larger than embryos at the natural stand at comparable times.

Bibliographic Details

Erika D. Anderson; John N. Owens; Anna M. Colangeli; John H. Russell

Canadian Science Publishing

Environmental Science; Agricultural and Biological Sciences

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