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Comparative Study
. 2022 Mar 21;22(1):129.
doi: 10.1186/s12870-022-03523-x.

QTL detection for bread wheat processing quality in a nested association mapping population of semi-wild and domesticated wheat varieties

Junmei Hu #  1 , Guilian Xiao #  1 , Peng Jiang  1 , Yan Zhao  1 , Guangxu Zhang  2 , Xin Ma  1 , Jie Yao  3 , Lixia Xue  4 , Peisen Su  5 , Yinguang Bao  6
Affiliations
Comparative Study

QTL detection for bread wheat processing quality in a nested association mapping population of semi-wild and domesticated wheat varieties

Junmei Hu et al. BMC Plant Biol. .

Abstract

Background: Wheat processing quality is an important factor in evaluating overall wheat quality, and dough characteristics are important when assessing the processing quality of wheat. As a notable germplasm resource, semi-wild wheat has a key role in the study of wheat processing quality.

Results: In this study, four dough rheological characteristics were collected in four environments using a nested association mapping (NAM) population consisting of semi-wild and domesticated wheat varieties to identify quantitative trait loci (QTL) for wheat processing quality. A total of 49 QTL for wheat processing quality were detected, explaining 0.36-10.82% of the phenotypic variation. These QTL were located on all wheat chromosomes except for 2D, 3A, 3D, 6B, 6D and 7D. Compared to previous studies, 29 QTL were newly identified. Four novel QTL, QMlPH-1B.4, QMlPH-3B.4, QWdEm-1B.2 and QWdEm-3B.2, were stably identified in three or more environments, among which QMlPH-3B.4 was a major QTL. Moreover, eight important genetic regions for wheat processing quality were identified on chromosomes 1B, 3B and 4D, which showed pleiotropy for dough characteristics. In addition, out of 49 QTL, 15 favorable alleles came from three semi-wild parents, suggesting that the QTL alleles provided by the semi-wild parent were not utilized in domesticated varieties.

Conclusions: The results show that semi-wild wheat varieties can enrich the existing wheat gene pool and provide broader variation resources for wheat genetic research.

Keywords: Nested association mapping (NAM) population; Processing quality; Quantitative trait locus; Semi-wild wheat; Wheat.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Phenotypic data of wheat processing quality of the five parents and the NAM population. A The four dough rheological characteristics of the five parents (a–e) and the ANOVA between five parents of four dough rheological characteristics (f–i). Labels A and B indicate significant differences at the level of P < 0.01, and labels a and b indicate significant differences at the level of P < 0.05. B The boxplot for four dough rheological characteristics of four RIL populations. The different color lines of black, green, yellow, red, and blue indicate the five parents of the NAM population YZ, CY, HU, YN, and YT, respectively. C The relationships between four dough rheological characteristics of the NAM population. YZ, Yanzhan 1; CY, Chayazheda 29; HU, Hussar; YN, Yunnanxiaomai; YT, Yutiandaomai. MlPT, midline peak time; MlPH, midline peak height; PkWd, peak width; WdEm, width at eight minutes
Fig. 2
Fig. 2
Identified QTL for wheat processing quality detected in the NAM population. Red, blue, green and purple indicate the midline peak time, the midline peak height, the peak width, and the width at eight minutes, respectively. The outermost part of the graph represents the QTL/gene reported in the previous study
See this image and copyright information in PMC

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