Volume 52 Number 2 Article 23
Year 1998 Month 4
Title: Outcrossing in a Diverse Peach Rootstock Seed Block
Author: T.G. Beckman
Abstract:
Over a 3 year period incidence of evident outcrosses (heterozygous redleaf) was recorded in openpollinated
seedlots of 'Nemared' and 'Rutgers Redleaf collected in a rootstock repository.
Since this
block is made up predominantly of green-leaf cultivars this technique should detect most outcrossing
events.
Outcrossing averaged 6 percent.
However, rootstock cultivar had a highly significant effect on
the number of outcrossing events; in 'Nemared' such events occurred on average at more than three
times the rate observed in 'Rutgers Redleaf.' In the absence of sufficient isolation to prevent undesirable outcrossing, rootstock cultivars need to have some readily identifiable 'marker' to reveal out
crosses so that they may be discarded.
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