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United States Department of Agriculture

Agricultural Research Service

Research Project: RESPONSE OF DIVERSE RICE GERMPLASM TO BIOTIC AND ABIOTIC STRESSES Title: Genomic structure of weedy rice

Authors
item Hyma, Katie -
item Olsen, Kenneth -
item Jia, Yulin
item Caicedo, Ana -

Submitted to: Annual International Plant & Animal Genome Conference
Publication Type: Abstract Only
Publication Acceptance Date: October 5, 2011
Publication Date: January 14, 2012
Citation: Hyma, K., Olsen, K., Jia, Y., Caicedo, A. 2012. Genomic structure of weedy rice. Annual International Plant & Animal Genome Conference. Abstract for conference.

Technical Abstract: Weedy (red) rice is a major pest of cultivated rice in the United States (U.S.) and worldwide, causing decreases in both yield and market value. Previous work has shown that U.S. weedy rice is comprised of two genotypically distinct lineages that are strongly correlated with strawhull awnless (SH) and blackhull awned (BHA) morphologies. Each of these lineages has arisen independently, and is most closely related to a specific variety of Asian cultivated rice (indica and aus respectively) (Reagon et al. 2010). Here we resequence the entire genome of one SH and one BHA along with one indica and one aus O. sativa cultivars and assess genome-wide levels and patterns of variation between weedy and cultivated forms of rice. Genome-wide patterns of divergence will be combined with QTL mapping to identify candidate genes affecting weedy traits. Together, these analyses will allow us to make inferences regarding the processes affecting the evolution of weediness in a parallel system.

Last Modified: 12/26/2014
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