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Mapping of Quantitative Trait Loci for Yield and Grade Related Traits in Peanut (Arachis hypogaea L.) Using High-Resolution SNP Markers
Plant Breed. Biotech. 2018;6:454-462
Published online December 1, 2018
© 2018 Korean Society of Breeding Science.

Yuya Liang, Michael R. Baring, Endang M. Septiningsih*

Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas 77843, USA
Correspondence to: Endang M. Septiningsih, eseptiningsih@tamu.edu, Tel: +1-979-845-7527, Fax: +1-979-845-0456
Received October 19, 2018; Revised November 18, 2018; Accepted November 19, 2018.
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Yield and grade are the key factors that affect production value of peanut. The objective of this study was to identify QTLs for pod yield, hundred-seed weight, and total sound mature kernel (TSMK). A total of 90 recombinant inbred lines, derived from Tamrun OL07 and a breeding line Tx964117, were used as a mapping population and planted in Brownfield and Stephenville, Texas. A genetic map was developed using 1,211 SNP markers based on double digest restriction-site associated DNA sequencing (ddRAD-seq). A total of 10 QTLs were identified above the permutation threshold, three for yield, three for hundred-seed weight and four for TSMK, with LOD score values of 3.7 - 6.9 and phenotypic variance explained of 12.2% - 35.9%. Among those, there were several QTLs that were detected in more than one field experiment. The commonly detected QTLs in this study may be used as potential targets for future breeding program to incorporate yield and grade related traits through molecular breeding.
Keywords : Peanut (Arachis hypogaea L.), Groundnut, Yield, Quality, TSMK, QTL mapping


December 2018, 6 (4)
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