Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: May 1, 2007
Publication Date: September 1, 2007
Repository URL: http://riley.nal.usda.gov/nal_web/digi/submission.html
Citation: Bregitzer, P.P., Raboy, V. 2007. Registration of Four Low-Phytate/Wild Type Pairs of Barley Germplasm.. Journal of Plant Registrations 1:139-140. Interpretive Summary: We have produced four pairs of related lines, where each member of the pair is derived from a plant containing a mutation that causes a reduction in seed phytate and an increase in digestible phytate. One member of the pair has normal levels of phytate, the other has the low phytate trait. Phytate is the predominant form of phosphorus in seeds, but it cannot be digested by humans and non-ruminant animals, and can contribute to phosphorus and mineral deficiencies when grain is the major component of a diet. Furthermore, the undigested phosphorus contributes to phosphorus water pollution, a problem of particular importance for large-scale animal production of pigs, chickens, fish, and other non-ruminants. Low phytate varieties are being developed in a number of crops, including barley, and although much has been discovered about the nutritional qualities of low phytate crops, much remains to be discovered about the genetic and biochemical alterations that may be present. Studies of the differences between the normal and low phytate members of each pair will help answer remaining questions that we have about low phytate barley. The answers to these questions are likely to lead to solutions that will produce further improvements in the agricultural productivity, nutritional benefits, and environmental benefits of low phytate barley.
Technical Abstract: Four pairs of sib lines derived from low-phyate mutants have been developed and released in 2007 by The Agricultural Research Service, U.S. Department of Agriculture. Each pair consists of a low phytate (LP) and a wildtype (WT) line. These lines are designated LP1 (P.I. xxxxxx) and LP1-WT(P.I. xxxxxx), LP2 (P.I. xxxxxx) and LP2-WT (P.I. xxxxxx), LP3(P.I. xxxxxx) and LP3-WT (P.I. xxxxxx), and LP4 (P.I. xxxxxx) and LP4-WT (P.I. xxxxxx). These lines will be useful for the production of low phytate barley cultivars and for genetic and biochemical studies.