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Genes 2017, 8(8), 205;

Mapping of QTLs for Seed Phorbol Esters, a Toxic Chemical in Jatropha curcas (L.)

Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom 73140, Thailand
Department of Plant Science and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Korea
Author to whom correspondence should be addressed.
Received: 5 July 2017 / Revised: 12 August 2017 / Accepted: 17 August 2017 / Published: 18 August 2017
(This article belongs to the Special Issue Plant Genomics and Epigenomics for Trait Improvement)
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Jatropha (Jatropha curcas L.) is an oil-bearing plant that has potential to be cultivated as a biodiesel crop. The seed cake after oil extraction has 40–50% protein that can be used in animal feeds. A major limitation in utilizing the cake is the presence of phorbol esters (PE), a heat-tolerant toxic chemical. To identify the quantitative trait loci (QTLs) for PE, we constructed a genetic linkage map from an F2 population of 95 individuals from a cross “Chai Nat” × “M10” using 143 simple sequence repeat (SSR) markers. M10 is low in seed PE while Chai Nat is high. Seeds from each F2 individual were quantified for PE content by high performance liquid chromatography. A single marker analysis revealed five markers from linkage group 3 (LG3) and nine markers from LG8 associated with seed PE. Inclusive composite interval mapping identified two QTLs, each on LG3 (qPE3.1) and LG8 (qPE8.1) responsible for the PE. qPE3.1 and qPE8.1 accounted for 14.10%, and 15.49% of total variation in seed PE, respectively. Alelle(s) from M10 at qPE3.1 increased seed PE, while at qPE8.1 decreased seed PE. qPE3.1 is a new loci for PE, while qPE8.1 is the same locus with that reported recently for PE. View Full-Text
Keywords: phorbol esters; Jatropha; physic nut; quantitative trait loci; QTL; seed toxin phorbol esters; Jatropha; physic nut; quantitative trait loci; QTL; seed toxin

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Amkul, K.; Laosatit, K.; Somta, P.; Shim, S.; Lee, S.-H.; Tanya, P.; Srinives, P. Mapping of QTLs for Seed Phorbol Esters, a Toxic Chemical in Jatropha curcas (L.). Genes 2017, 8, 205.

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