Registration of LP1–2581, LP1–2163H, LP3–1159, and LP640–1304 Low‐Phytate Spring Barley Germplasm Lines

Abstract

The Agricultural Research Service, U.S. Dep. of Agriculture (USDA‐ARS) has developed and released four low‐phytate spring barley (Hordeum vulgare L.) germplasm lines: LP1–2581 (Reg. No. GP‐196, PI 658245), LP1–2163H (Reg. No. GP‐199, PI 658248), LP3–1159 (Reg. No. GP‐198, PI 658247), and LP640–1304 (Reg. No. GP‐197, PI 658246). The low phytate trait derives from sodium azide‐induced mutations. In these lines, phytate—the primary form of phosphorus in grain—is significantly reduced, and inorganic phosphorus is increased. Total phosphorus is unchanged or reduced slightly. Phytate cannot be digested by monogastric animals and is an effective chelator of nutritionally important minerals. Low‐phytate barley has been associated with increased phosphorus and mineral nutrition and reduced phosphorus excretion when fed to monogastric animals. Each of these lines represents a unique combination of genetic background and a low‐phytate allele. Each mutant allele represents a mutation at a different locus. These lines may be useful for the production of future low‐phytate cultivars or for genetic and biochemical studies.