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ARS Home » Plains Area » Lubbock, Texas » Cropping Systems Research Laboratory » Plant Stress and Germplasm Development Research » Research » Publications at this Location » Publication #298404
Title: Registration of RTx430/gaigaoliang sorghum [sorghum bicolor (L.) moench recombinant inbred line mapping population

Author
item Burow, Gloria
item FRANKS, CLEVE - Pioneer Hi-Bred International
item Burke, John
item Xin, Zhanguo
item Pederson, Gary

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 11/23/2015
Publication Date: 4/15/2016
Citation: Burow, G.B., Franks, C., Burke, J.J., Xin, Z., Pederson, G.A. 2016. Registration of RTx430/gaigaoliang sorghum [sorghum bicolor (L.) moench recombinant inbred line mapping population. Journal of Plant Registrations. 10:206-209.

Interpretive Summary: Soil temperatures at 15'C or below limit germination and seedling establishment for warm season cereal crops such as sorghum (Sorghum bicolor L. [Moench]) during early season planting. To better understand the genetics of early season cold tolerance in sorghum, we developed a mapping population consisting of 171 F7-F8 recombinant inbred lines (RILs) derived from the cross between RTx430 (cold sensitive) and PI610727 (cold tolerant) germplasm. This population was released in 2011 via the Genetic Resource Information Network (GRIN) as a long term genetic resource to map early season field germinability plus seedling vigor and other important complex agronomic traits in sorghum. The RILs were evaluated for cold and optimal temperature germinability in the laboratory; with screening for field emergence, and seedling vigor conducted in two locations during early season planting. Ten significant genomic regions identified by quantitative trait loci (QTL) mapping were significantly associated with early season field germinability in locations teste, and one significant QTL was detected for seedling vigor in this population. The QTL information were utilized to identify early season cold tolerant inbred lines without pigmented testa that can be used as pollinators or as male parents in breeding programs.

Technical Abstract: The RTx430 x ‘Gaigaoliang’ (PI610727) sorghum [Sorghum bicolor (L.) Moench.] (Reg. No. MP-__; NSL ____ MAP) recombinant inbred line (RIL) mapping population was developed at the Plant Stress and Germplasm Development Unit, Cropping Systems Research Laboratory, USDA-ARS, Lubbock, TX and released in 2011 via the Genetic Resource Information Network (GRIN) as a long term genetic resource to map early season field germinability plus seedling vigor and other important complex agronomic traits in sorghum. This population is composed of 171 F7 recombinant inbred lines (RILs) developed by single seed descent in earlier generations and then advanced and evaluated as plots in the field in three locations. The genotype data for this population consists of 141 simple sequence repeat (SSR) markers and 2922 single nucleotide polymorphism obtained by genotype by sequencing (gbs) technology. Ten QTL were detected in this population for early season field germination. These QTL data were utilized to identify early season cold tolerant inbred lines without pigmented testa that can be used as pollinators or as male parents in breeding programs.