Dissection of a QTL reveals an adaptive, interacting gene complex associated with transgressive variation for flowering time in rice.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Luis F MaasS R McCouch

Abstract

A days to heading QTL (dth1.1) located on the short arm of rice chromosome 1 was sub-divided into eight sub-introgression lines (SILs) to analyze the genetic basis of transgressive variation for flowering time. Each SIL contained one or more introgression(s) from O. rufipogon in the genetic background of the elite Oryza sativa cultivar, Jefferson. Each introgression was defined at high resolution using molecular markers and those in the dth1.1 region were associated with the presence of one or more flowering time genes (GI, SOC1, FT-L8, EMF1, and PNZIP). SILs and controls were evaluated for flowering time under both short- and long-day growing conditions. Under short-day lengths, lines with introgressions carrying combinations of linked flowering time genes (GI/SOC1, SOC1/FT-L8, GI/SOC1/FT-L8 and EMF1/PNZIP) from the late parent, O. rufipogon, flowered earlier than the recurrent parent, Jefferson, while recombinant lines carrying smaller introgressions marked by the presence of GI, SOC1, EMF1 or PNZIP alone no longer flowered early. Under long-day length, lines carrying SOC1/FT-L8, SOC1 or PNZIP flowered early, while those carrying GI or EMF1 delayed flowering. Across all experiments and in the field, only SIL_SOC1/FT-L8 was co...Continue Reading

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Citations

Jan 14, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Kaworu EbanaMasahiro Yano
Nov 20, 2013·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Samantha BaldwinJohn McCallum
Sep 17, 2013·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Erik den BoerMarieke J W Jeuken
Apr 6, 2013·Seminars in Cell & Developmental Biology·Muhammad Usman Anwer, Seth Jon Davis

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