Characterization of QTLs for Root Traits of Wheat Grown Under Different Nitrogen and Phosphorus Supply Levels

Overview

Journal Front Plant Sci

Date 2018 Jan 10

PMID 29312372

Citations 22

Authors

Yongzhe Ren

Yingying Qian

Yanhua Xu

Chunqin Zou

Dongcheng Liu

Xueqiang Zhao

Aimin Zhang

Yiping Tong

Affiliations

Soon will be listed here.

Abstract

Root is important in acquiring nutrients from soils. Developing marker-assisted selection for wheat root traits can help wheat breeders to select roots desirable for efficient acquisition of nutrients. A recombinant inbred line (RIL) population derived from wheat varieties Xiaoyan 54 and Jing 411 was used to detect QTLs for maximum root length and root dry weight (RDW) under control, low nitrogen and low phosphorus conditions in hydrophobic culture (HC). We totally detected 17 QTLs for the investigated root traits located at 13 loci on 11 chromosomes. These loci differentially expressed under different nutrient supplying levels. The RILs simultaneously harboring positive alleles or negative alleles of the most significant three QTLs for RDW, , and , were selected for soil column culture (SC) trial to verify the effects of these QTLs under soil conditions. The RILs pyramiding the positive alleles not only had significantly higher shoot dry weight, RDW, nitrogen and phosphorus uptake in all the three treatments of the HC trial, but also had significantly higher RDW distribution in both the top- and sub-soils in the SC trial than those pyramiding the negative alleles. These results suggested that QTL analysis based on hydroponic culture can provide useful information for molecular design of wheat with large and deep root system.

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