Submitted to: Rice Technical Working Group Meeting Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: February 24, 2002
Publication Date: N/A
Technical Abstract: Acquisition of elite germplasm is a continuous effort in the USDA germplasm system. In 1996, 213 rice accessions were introduced from China. After quarantine processing and seed increase, 98 accessions were evaluated for rough rice yield, milling yield, and amylose content in 2000, and blast and sheath blight resistance in 2001. Fifteen Chinese germplasm accessions were identified to have a high rough rice yield potential (up to 50% more than the best US check) with poor to fair milling yield, good rice blast resistance and fair tolerance to sheath blight, typical indica grain amylose content, late maturity and tall plant height as compared to the US checks. The Chinese accessions consisted of one short grain, Kechengnuo No.4, two medium grains, GP-2 and Taizhongxian 255, and twelve long grains, R 312, 4593, 4594, 4596, 4597, 4607, 4611, 4612, 4632, 4633, 4641(1), and 4642. USDA Rice Germplasm Collection has included these accessions between nPI 614956 and PI 615217. The identified Chinese germplasm accessions are important to be used as gene donors in order to improve yield potential and disease resistance in the US rice production.