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UCR has an astounding, but sometimes underappreciated, range of natural history collections, approaching 4 million specimens. Infrastructure to UCR provided by the collections has been leveraged in a number of projects to UCR faculty resulting in over ten million dollars in federal grants and private donations over the past five years. In addition to the six main UCR collections, the following also have a significant impact on supporting and extending UCR research, teaching, and outreach:

Phytophthora

The UCR World Phytophthora Collection curates more than 6500 living (in liquid N2) isolates including about 90 species/types collected worldwide from a wide range of hosts. Phytophthora includes an array of some of the most destructive agricultural pathogens and provides an important resource and voucher repository in support of worldwide research on this group. At UCR the collection is an important resource for teaching and investigation, including undergraduate research. Support for the collection has included competitive USDA grants.
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Avocado Germplasm

The UCR Avocado Germplasm Collections maintain two collections of avocado germplasm, located at the South Coast Research and Extension Center in Irvine, CA. One of these collections focuses on horticultural varieties and their utilization in the UCR avocado-breeding program. The second collection emphasizes related species and genera that may be of value in other types of research and in development of avocado rootstocks. The collections together total several hundred selections.
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Wheat Germplasm

The UCR Wheat Germplasm Collection: was started to study wheat evolution and consists of 2,000+ wild wheats, relatives, and primitive landraces from the Mediterranean and Middle East countries. Started in the 1970s, it was for many years a major source of wheat germplasm for disease resistance, but has now largely been duplicated by the USDA Germplasm Collection at Aberdeen ID, the Wheat Genetic Stocks collection at Manhattan, KS and by CIMMYT, Mexico. More recent collections from Syria, Turkey, Lebanon and Armenia are duplicated at ICARDA, Aleppo, Syria. Funding support comes from RASP and sometimes federal or California Wheat Commission funds. Increased interest in the collection is expected since NSF and USDA granting agencies are now interested in root characters as a way to increase water and nutrient uptake and ultimately increase grain yield. For the last 100 years these agencies have largely neglected crop root characters and the genes that control them. The collection helps train undergraduate and graduate students in germplasm biodiversity, root genetics and plant breeding.
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Wheat Cytogenetics Aneuploid Stocks

The UCR Wheat Cytogenetics Aneuploid Stocks Collection: is allied with the Wheat Germplasm Collection and numbers an additional 8,000 genetic stocks. It includes the classical wheat chromosome aneuploidy stocks made by Dr. E.R. Sears (USDA, Columbia MO) and more recent cytogenetic constructs in CIMMYT wheats made by Adam Lukaszewski. He is now the world keeper of Sears’ collection since the USDA discontinued curation in Missouri. It is often used by molecular geneticists for specific chromosome arms for chromosome sorting and molecular mapping. In addition, Adam has several thousand recombinant inbred lines and doubled haploid combinations of specific F1 hybrids also used in molecular mapping. Funding comes from RASP, and for other turf genera constructs from the Turfgrass program. The collection is used to train undergraduate and graduate students in grass genetics and drought physiology. The collection is heavily used by grass scientists around the world.
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