1a.Objectives (from AD-416):
The objective of this cooperative research project is to operate a fall and winter rice nursery for the purpose of advancing plant generations and seed increase.
1b.Approach (from AD-416):
The Dale Bumpers National Rice Research Center (DBNRRC) of the USDA, ARS, SPA will provide rice seed stock for increase and harvest the plots. The Cooperator will plant and manage the research plots during the growing season.
The Puerto Rico winter nursery was successfully used to advance some 1000 breeding lines targeting high value specialty markets and one rice mapping population that will be used to map genomic regions for yield, disease resistance and grain quality traits. In addition, genetic resources that possess individual blast resistance genes or isolated QTLs for other disease resistance traits were increased. Some 100 germplasm lines from the National Small Grains Collection (NSGC) that had low seed inventories were grown for seed rejuvenation and increase. This seed was provided to the NSGC distribution site in Aberdeen, ID. These rice accessions are distributed worldwide as part of the USDA NSGC germplasm collection of 18,000 rice accessions. In addition, 15 early maturing genetic materials from the NSGC Core Collection were increased as possible seed stocks for use by organic rice growers located in the northeastern USA. The cooperator accurately planted the materials, managed the field during the growing season, provided facilities and expertise for harvesting and processing the seed, and coordinated seed inspection with APHIS authorities prior to shipment of the seed to Arkansas. The cooperator visited the Stuttgart location to discuss operations and equipment that could enhance the quality and efficiency of the winter nursery.