Registration of N30‐N56, N741, N743, N745, N747, U362, U363, U367, U369‐U374, U389‐U394, U396‐U398, and U500 Sweetclover Genetic Stocks

Forty-nine white-flowered sweet clover (Melilotus alba) genetic stocks and a yellow-flowered sweet clover (Melilotus officinalis) genetic stock (N56) were developed jointly by the USDA-ARS and the Agricultural Research Division, Institute of Agriculture and Natural Resources, University of Nebraska-Lincoln and were jointly released in May 2004. The genetic stocks, which contain unique combinations of genes and traits, were developed over more than 3 decades of cooperative sweet clover research. The 49 sweet clover genetic stocks include a set of 16 lines (N30-N45), which represent all possible homozygous combinations of 4 allelic pairs, Y/y, C/c, Cu/cu and B/b. The Y/y alleles affect seed colour and the C/c alleles are concerned with both seed and seedling colour. The Cu/cu and B/b genes affect coumarin (more accurately o-hydroxycinnamic acid β-D-glucoside) content and β-glucosidase activity, respectively. The other genetic stocks were N46-N53, N54-N55, N741, N743, N745, N747, U362, U363, U367, U369-U374, U389-U394, U396-U398 and U500. Registration of these genetic stocks supplements 3 previously released and registered biennial, yellow-flowered sweet clover germplasms (N27, N28 and N29).