Provenance Data for collection material?

Tim Harvey
Sat, 24 Dec 2011 12:29:09 PST

So production of seed via controlled pollination is not an option? Surely it would be better, from a genetic diversity perspective, to distribute such seedlings as opposed to clonal propagations?

> Date: Sat, 24 Dec 2011 11:56:12 -0800
> From:
> To:
> Subject: Re: [pbs] Provenance Data for collection material?
> T
> I assume you refer tio the policy which restricts the use of seed 
> produced in cultivation. There are several reasons for this. One of the 
> most obvious is the increased likelihood that seeds in cultivation are 
> more likely to represent hybridization. In general, we have little 
> interest in 'man-made' hybrids and cultivars (which seems to be a major 
> focus of interest among private collectors as reflected in the PBS 
> listserve). We do have a number of naturally occuring 
> cultivars/varieties/subspecies but few produced horticulturally (e.g., 
> we have about 10,000 different species but close to 13,000 taxa). I 
> think the cultivated variations have great value, but I see no way, a 
> serious research collection could maintain the full array of such 
> variation. Some gardens are in fact, specializing in horticultural 
> cultivars.
> Another reason we prefer wild-collected seed is the genetic diversity 
> of the wild population is better represented as compared to selfing or 
> limited interindividual pollution in a garden. Of course, the value of 
> provenance relates to the use of plants for academic research and 
> hopefully ex situ conservation (if plants are to be reintroduced, we 
> believe it preferable to use plants adapted to the site). vegetatively 
> propagated materials (e.g., cuttings, bulbiles, bulb divisions) at least 
> represent genetically represent the original specimen.
> On a related note, the fact that it is so hard to get data for what's 
> even in public botanical gardens also illustrates one reasons why 
> cultivation by private growers or even small public gardens a problem. 
> We have a long way to go to catalog and track such collections. In fact, 
> database development and maintenance are major issues for all gardens. 
> Also, these individual/small collections are probably even more likely 
> to be lost with the individual than changes due to new directors in more 
> long-standing public gardens.
> Paul
> Paul Licht, Director
> Univ. California Botanical Garden
> 200 Centennial Drive
> Berkeley, CA 94720
> (510)-643-8999
> On 12/24/2011 11:23 AM, Tim Harvey wrote:
> > Paul,
> >
> > I was wondering at the rationale behind your policy, assuming the parent plants would be of known origin?
> >
> > T
> >
> >
> >> Incidentally, our own policy prevents use of
> >> our seed for building the collection since the seed is not directly from
> >> a wild population source. 
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