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United States Department of Agriculture

Agricultural Research Service

Research Project: ARID LAND PLANT GENETIC RESOURCES CONSERVATION, EVALUATION, AND INFORMATION MANAGEMENT

Location: San Joaquin Valley Agricultural Sciences Center

Project Number: 5302-21000-010-00
Project Type: Appropriated

Start Date: Feb 26, 2009
End Date: Mar 13, 2013

Objective:
1)Strategically expand the genetic diversity in selected genebank collections and improve associated information for priority genetic resources of crops, crop varieties, and native plant genetic resources adapted to long-season and/or arid land conditions. 1A) Acquire samples and associated information for Parthenium (Guayule), Lesquerella (bladderpod), Limnanthes (meadow foam), and Simmondsia (jojoba) from selected sites in the United States, Mexico, and Central and South American countries, that will fit current gaps in NPGS collections. 1B) In cooperation with the state and federal governments in the Southwest U.S. and relevant state rare plant societies identify and establish in situ seed collection sites for endemic species of Parthenium, Lesquerella and Limnanthes. 2) In collaboration with other NPGS sites, efficiently and effectively regenerate and conserve priority crops and native plant genetic resources adapted to long-season and/or arid land conditions, and distribute samples and associated information worldwide. 2A) Conserve and distribute 1,583 accessions of oilseed, vegetable, medicinal, industrial crop genetic resources adapted to arid climates, emphasizing Parthenium, Lesquerella, Limnanthes, and Simmondsia. 2B) Continue to regenerate the accessions from other NPGS sites, and clonal and seed propagated accessions for Parlier priority crops, emphasizing accessions with low germination, low seed supply, open-pollinated seed stocks, those lacking security back-up or those designated by the primary NPGS curator as important, and continue to develop new and/or superior regenerations methods. Regenerate 1,000-1,500 accessions per year of Parthenium, Lesquerella, Limnanthes, Simmondsia and other NPGS site species that are in need of new seed or back-up at second sites, emphasizing critical back-ups of Parthenium, Lesquerella and Limnanthes. 3) In collaboration with other NPGS sites, strategically characterize (genotype) and evaluate (phenotype) selected priority crop genetic resources for DNA markers, morphological descriptors, and key agronomic or horticultural traits, and incorporate characterization and evaluation data into the Germplasm Resources Information Network (GRIN) and/or other relevant databases. 3A) With cooperaters, apply newly developed DNA marker data to phylogenetic and genetic diversity analyses of priority crops, especially Parthenium, Limnanthes and Lesquerella. Incorporate characterization data into the GRIN and/or other databases. 3B) Conduct cooperative research to update and apply phenotypic descriptors for priority collections with an emphasis on morphological and horticultural traits, such as key floral, fruit, and seed characteristics as well as characterizing industrial or other value relative to features related to adaptation to arid land conditions.

Approach:
1)Make critical evaluation of the collections now held at Parlier, and prioritize the intrinsic value of each collection relative to the resources available. New accessions will be aquired through exchange with other scientists in the universities and/or institutions, foreign countries national programs, botanical gardens, or by plant exploration. Initiate the ground surveys of vernal pools in California to identify key areas where in situ conservations sites can be designed for multiple species of Limnanthes. Identify populations of Parthenium and Lesquerella in the Southwest U.S. such that future seed and/or DNA sample acquisitions will be possible. 2) Relevant information, available passport documentation and germplasm characterization data collected according to proposed or established descriptors for priority taxa grown for other NPGS sites will be summarized and provided to GRIN. Regeneration and back-up of seed and/or clonal germplasm accessions from other NPGS sites will be continued and expanded in accordance with protocols agreed upon by the Parlier curator and the NPGS curators responsible for the crop. Establishment of viable back-up plots at other sites and/or the development of effective protocols will be the initial priority. Emphasis on germplasm regeneration and management schedules to enhance security back-ups will take place at NCGRP. Selected accessions assigned to other NPGS sites that require or are adapted to arid land, long season conditions for growth and reproduction will be regenerated at Parlier. 3) DNA will be isolated from bulked samples of the major out breeding collections using a standard CTAB protocol. Genetic diversity studies will be conducted with PCR-based markers. SSR markers will be used where they are available or where development of these markers is possible. Replacing 5302-21000-009-00D and 5306-21000-008-00D (12/08).

Last Modified: 7/25/2014
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