Select the tab for the type of search. Each tab has everything you need to do to perform that type of search.
(Results of more than 500 will not return images.)
This search will show only accessions that have material that may be requested, including those not seasonally available.
You may list accessions with separators (commas or semicolons, as shown below) or by entering them on separate lines, such as
PI 651794
PI 651649
PI 651650
When searching a range of accessions, use the Advanced Search tab with the Accession Identifier Range criterion.
The more information you provide, the better the search will be.
Scientific name (any part, no hybrid symbols)
Genebank
Country of Origin
Other search criteria:
If your results aren't what you expected, try using the Advanced Search tab and filling in more information.
Your query included:
All accessions
| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
|---|
| 0 | PI 539820 | 'C-32' | Citrus sp. | California, United States | RIV | | | 1990 | DEVELOPED | 1951 | | | | | Cultivar | According to information received from the developer (ML Roose, 1989), C32 "...is tolerant to tristeza, and reasonably tolerant to Phytophthora and citrus nematode (at least as tolerant as Troyer). We do not know its reaction to exocortis, but recommend that only virus-free scions be used. Based on trials at [University of California, Riverside], Lindcove [Field Station, Tulare County], and a few trees in Pauma Valley, navel and Valencia oranges, Minneola tangelos, and Lisbon lemons budded on C-32 are large vigorous trees with high yields, Compatibility with Eurekas has bnot been tested. Fruit quality is simialr to that of trees on Troyer. Despite these attractive characteristics, two major problems limit use of C-32 citrange. First, it produces few fruit, and most fruit are seedless or nearly so. The average numnber of seed per fruit is often less than one. The second problem is that seedlings are somewhat variable. We have studied this problem in detail using biochemical markers to determine which seedlings are nucellar vs zygotic. In most seedlots we observe about 10 % zygotic seedlings (similar to the frequency in Swingle citrumelo). However, among nucellar seedlings, leaf morphology is much more variable than Troyer or Swingle. Therefore, the percentage of off-type seedlings appears higher than 10 %, and it is difficult to identify true-to-type seedlings. The consequneces of budding trees on off-type seedlings of C-32 are not known, but certainly some of the trees will not perform as expected. The obvious solution to both problems is for an enterprising nurseryman to develop a method for vegetative propagation of C-32, either as srooted cuttings or through tissue culture. The yield advantage seen in trials at Lindcove supports charging a premium for the trees, provided that the large tree size is desired by gowers." Additional information is available in the release notice (citation below) and from the UC Riveside Citrus Variety Collection. (RR Krueger, 12/31/2012) | 1434756 | PI 539820 |