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Submitted to: Meeting Abstract
Publication Type: Abstract Only Publication Acceptance Date: 7/1/2002 Publication Date: 7/1/2002 Citation: GRUSAK, M.A. DIVERSITY OF THE PISUM SATIVUM CORE COLLECTION FOR SEED MINERAL CONCENTRATIONS. ABSTRACTS OF THE FIRST INTERNATIONAL CONFERENCE ON LEGUME GENOMICS AND GENETICS: TRANSLATION TO CROP IMPROVEMENT. p.117. ABSTRACT H2. Interpretive Summary: Technical Abstract: Legumes are an important source of dietary nutrients for humans, and for other animals. Whereas legume seeds can contribute greatly to the dietary energy and amino acid needs of the individual, through their starch, lipid, and protein content, they also contain a number of essential macronutrient (K, Ca, P, Mg, Na, Cl) and micronutrient (Fe, Mn, Zn, Cu, Se, Ni, I, Cr) minerals. In order to understand the genetic variation that exists for mineral content in pea, an important legume crop, we grew the pea core collection (500 diverse accessions) that is maintained by USDA, and have been analyzing seed mineral concentrations. Plants of each accession were grown in a greenhouse in soil mix with "luxury consumption" for all minerals. The evaluation was designed with one constant environment, in order to focus on the genetic potential of each accession. For mixed seed accessions, one seed phenotype was randomly chosen for planting. Based on measurements of the first 100 accessions, we have shown that seed mineral concentrations among genotypes range from 3.5-fold to 6.9-fold for various micronutrient minerals, and range from 1.6-fold to 8.6-fold for various macronutrient minerals. These diverse lines will serve as important tools for physiological investigations into the mechanisms of seed mineral import, and can be used by breeders interested in the nutritional enhancement of pea. This work was funded in part by USDA-ARS Cooperative Agreement No. 58-6250-1-003 and through a grant from the USDA/ARS Pisum Crop Germplasm Committee. |
