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Identification of QTL for barley grain size


Wang, J and Wu, X and Yue, W and Zhao, C and Yang, J and Zhou, M, Identification of QTL for barley grain size, PeerJ, 9 Article e11287. ISSN 2167-8359 (2021) [Refereed Article]


Copyright Statement

Copyright 2021 Wang et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.7717/peerj.11287


Background: Barley grain size is one of the key factors determining storage capacity during grain filling. Large, well-filled grains also have a high malt extract potential. Grain size is a complex quantitative trait and can be easily affected by environmental factors thus the identification of genes controlling the trait and the use of molecular markers linked to the genes in breeding program is the most effective way of improving grain size.

Methods: Grain sizes of 188 doubled-haploid (DH) lines derived from the cross of a Japanese malting barley variety (Naso Nijo) and a Chinese feed barley variety (TX9425) were obtained from three different sites in two consecutive years. The average data were used for identifying QTL for grain size.

Results: A total of four significant QTL were identified for grain length (GL) and three for grain width (GW). The two major GL QTL are located at similar positions to the QTL for malt extract on 2H and uzu gene on 3H, respectively. However, the GL QTL on 2H is more likely a different one from the malt extract QTL as most of the candidate genes are located outside the fine mapped QTL region for malt extract. The GL QTL on 3H is closely linked with uzu gene but not due to a pleiotropic effect of uzu. The three QTL for grain width on 1H, 2H and 5H, respectively, were located at same position to those for GL.

Item Details

Item Type:Refereed Article
Keywords:barley (Hordeum vulgare L.), grain size, quantitative trait loci, molecular marker
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Agrochemicals and biocides (incl. application)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Barley
UTAS Author:Zhao, C (Dr Chenchen Zhao)
UTAS Author:Zhou, M (Professor Meixue Zhou)
ID Code:145380
Year Published:2021
Web of Science® Times Cited:6
Deposited By:TIA - Research Institute
Deposited On:2021-07-19
Last Modified:2021-09-08
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