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ARS Home » Southeast Area » Stuttgart, Arkansas » Dale Bumpers National Rice Research Center » Research » Publications at this Location » Publication #384041
Research Project: Gene Discovery and Crop Design for Current and New Rice Management Practices and Market Opportunities

Location: Dale Bumpers National Rice Research Center

Title: Registration of two rice mapping populations using weedy rice ecotypes as a novel germplasm resource

Author
item JIA, YULIN
item SINGH, VIJAY - University Of Arkansas
item Gealy, David
item LIU, YAN - University Of Arkansas
item MA, JIANBING - University Of Arkansas
item THURBER, CARRIE - University Of Massachusetts, Amherst
item ROMA-BURGOS, NILDA - University Of Arkansas
item OLSEN, KEN - Washington University
item CAICEDO, ANA - University Of Massachusetts, Amherst

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/1/2021
Publication Date: 12/7/2021
Citation: Jia, Y., Singh, V., Gealy, D.R., Liu, Y., Ma, J., Thurber, C.S., Roma-Burgos, N., Olsen, K.M., Caicedo, A.L. 2021. Registration of two rice mapping populations using weedy rice ecotypes as a novel germplasm resource. Journal of Plant Registrations. https://doi.org/10.1002/plr2.20174.
DOI: https://doi.org/10.1002/plr2.20174

Interpretive Summary: Weedy rice, competing with cultivated rice, is a major agricultural pest worldwide. Knowledge on the competitiveness of weedy rice can benefit the development of improved rice varieties and improve weedy rice control. We developed two mapping populations from crosses of the Asian indica rice variety ‘Dee Geo Woo Gen,’ (DGWG) with two weedy rice ecotypes, an early-flowering straw hull (SH) type ‘AR-2000-1135-01’ from Arkansas and a late-flowering black hull (BHA) type ‘MS-1996-9’ from Mississippi. The progeny from these weed and mapping populations have been used to identify genomic regions associated with weedy traits, as well as resistance to sheath blight and rice blast diseases. The mapping population consists of 186 (DGWG/SH) and 236 (BHA/DGWG) F8 progeny, of which 175 (DGWG/SH) and 224 (BHA/DGWG) were used to construct two linkage maps using single nucleotide polymorphic markers (SNPs) to identify weedy traits, sheath blight and blast resistance loci. These mapping populations and related datasets represent a valuable resource for basic rice evolutionary genomic research and applied marker-assisted breeding efforts in disease resistance.

Technical Abstract: Two mapping populations were developed from crosses of the Asian indica rice (Oryza sativa L.) variety ‘Dee Geo Woo Gen,’ (DGWG) and two weedy rice ecotypes, an early-flowering straw hull (SH) biotype ‘AR-2000-1135-01’ (PI 653435) collected in Arkansas and a late-flowering black hull (BHA) biotype ‘MS-1996-9’ (PI 653419) collected in Mississippi. The weed and crop-based rice recombinant inbred line (RIL) mapping populations have been used to identify genomic regions associated with weedy traits, as well as resistance to sheath blight and rice blast diseases. The mapping population consists of 185 (DGWG/SH) and 234 (BHA/DGWG) F2:5 RILs, of which 175 (DGWG/SH) and 224 (BHA/DGWG) were used to construct two linkage maps using single nucleotide polymorphic markers (SNPs) to identify weedy traits, sheath blight and blast resistance loci. These mapping populations and related datasets represent a valuable resource for basic rice evolutionary genomic research and applied marker-assisted breeding efforts in disease resistance.