|Estorninos Jr, L|
Submitted to: Arkansas Experiment Station Research Series
Publication Type: Experiment Station
Publication Acceptance Date: 8/1/2000
Publication Date: N/A
Citation: N/A Interpretive Summary: Interpretive summary not required.
Technical Abstract: Low rates of outcrossing between rice and red rice or between red rice ecotypes have long been suspected. A study was initiated to analyze the genetic relationships between red rice populations and cultivated rice by DNA figerprinting. Twenty three red rice accessions and one rice cultivar were grown in the greenhouse. Preliminary cluster analysis as shown in the multidimensional scaling (MDS) plots revealed that the 24 accessions could be separated into five groups. Group 1 was Bengal, the only rice cultivar. Group 2 included KatyRR (suspected cross between rice and red rice) which was genetically distant from the other clusters. Group 3 was accession #8. The fourth group were the strawhull and awnless accessions consisting of #7, 1995-7, 1995-12, 15-A, 1996-5, and Stuttgart strawhull. The fifth group was the awned-type, strawhull or blackhull accessions; MS- 4, LA-3, 11-D, Stuttgart blackhull, TX-4, 1995-4, 1995-14, 10-A, 1996-7, 19-A, and 5-A. Accessions 17-C and 1995-1 were blackhull and awned but were genetically distant from this group. Accessions #8 and 5-A were collected from the same field and were presumed to be the same biotype but showed minimal genetic relationship.