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Effects of TaPHS1 and TaMKK3-A Genes on Wheat Pre-Harvest Sprouting Resistance

by Meng Lin 1,2, Shubing Liu 1,3, Guorong Zhang 1 and Guihua Bai 1,4,*
1
Agronomy Department, Kansas State University, 2004 Throckmorton Hall, Manhattan, KS 66506, USA
2
353 Plant Science, Plant Breeding and Genetics, Cornell University, Ithaca, NY 14850, USA
3
Department of Agriculture, Shandong Agricultural University, Taian 271018, China
4
Hard Winter Wheat Genetics Research Unit, USDA-ARS, 4008 Throckmorton Hall, Manhattan, KS 66506, USA
*
Author to whom correspondence should be addressed.
Agronomy 2018, 8(10), 210; https://doi.org/10.3390/agronomy8100210
Received: 31 August 2018 / Revised: 25 September 2018 / Accepted: 28 September 2018 / Published: 30 September 2018
Pre-harvest sprouting (PHS) constrains wheat production worldwide by reducing both wheat grain yield and end-use quality. TaPHS1 on wheat chromosome 3AS and TaMKK3-A on chromosome 4AL are two cloned genes with major effects on PHS resistance and they are independent from grain color (GC). In this study, we used marker-assisted backcrossing (MAB) to introgress TaPHS1 and TaMKK3-A from two PHS resistant sources—‘Tutoumai A’ and ‘AUS1408′—into a sprouting-susceptible white wheat line, NW97S186. Progeny were tested in four environments to investigate individual and combined effects of those two genes. TaPHS1 significantly reduced PHS and its effect on PHS varied with environments and gene sources. In contrast, the TaMKK3-A gene also significantly reduced PHS but its effectiveness was influenced by environments. The two genes had additive effects on PHS resistance, indicating pyramiding those two quantitative trait lici (QTLs) could increase PHS resistance. The additive effects were greater in a mild environment, such as a greenhouse, than in a dry and hot environment during maturation. View Full-Text
Keywords: Triticum aestivum; pre-harvest sprouting; TaPHS1; TaMKK3-A; combined genetic effect Triticum aestivum; pre-harvest sprouting; TaPHS1; TaMKK3-A; combined genetic effect
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Lin, M.; Liu, S.; Zhang, G.; Bai, G. Effects of TaPHS1 and TaMKK3-A Genes on Wheat Pre-Harvest Sprouting Resistance. Agronomy 2018, 8, 210.

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